U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Publication year rev 7981-2019 Remove constraint Publication year rev: 7981-2019 Subject term dyes Remove constraint Subject term: dyes Subject term aqueous solutions Remove constraint Subject term: aqueous solutions
Start Over

Search

144  Search Results

« Previous | 1 - 100 of 144 |
Number of results to display per page

Search Results

1. A Turn-On Luminescence Method for Phosphate Determination Based on Fast Green-Functionalized ZrO₂:Yb,Er@ZrO₂ Core@Shell Upconversion Nanoparticles

Author:
Gonzalo Ramírez-García; Erik Díaz Cervantes; Oussama Mounzer; Elder De la Rosa; Tzarara López Luke; Fabiola N. de la Cruz
Source:
Analytical chemistry 2019 v.91 no.22 pp. 14657-14665
ISSN:
1520-6882
Subject:
antibodies; aqueous solutions; chemical bonding; colorimetry; crop yield; detection limit; dyes; electrostatic interactions; energy transfer; environmental impact; fertilizers; ions; ligands; luminescence; nanoparticles; phosphates; spectral analysis; zirconium oxide
Abstract:
... The development of practical and sensitive tools for detecting phosphate deficiency could facilitate engineering approaches to enhance crop yield and quality in phosphate-stressed environments, reducing the misuse of nonrenewable fertilizers and their consequent ecological impact. Herein, a 975 nm-activated method based on ZrO₂:Yb,Er@ZrO₂ core@shell upconversion nanoparticles is presented for rapi ...
DOI:
10.1021/acs.analchem.9b03817

2. A colorimetric/fluorescence dual-channel probe for highly discriminating detection of cysteine

Author:
Kai-Bin Li; Wang-Bo Qu; De-Man Han; Siqi Zhang; Wei Shi; Cai-Xia Chen; Xiu-Xia Liang
Source:
Talanta 2019 v.194 pp. 803-808
ISSN:
0039-9140
Subject:
absorption; aqueous solutions; chemical species; colorimetry; cysteine; dyes; fluorescence; image analysis; piperazine
Abstract:
... In this work, a novel fluorescence (FL) probe for selective and sensitive detection of Cys with colorimetric and FL dual signal changes was reported. The probe was synthesized by two step of sulfonamide reaction coupling between a sulfonyl benzoxadiazole (SBD) dye and dansyl chloride linked with rigid piperazine group. The probe showed a specific off-on response to Cys in aqueous solution with nan ...
DOI:
10.1016/j.talanta.2018.11.007

3. A comprehensive review of applications of magnetic graphene oxide based nanocomposites for sustainable water purification

Author:
Lakshmi Prasanna Lingamdinne; Janardhan Reddy Koduru; Rama Rao Karri
Source:
Journal of environmental management 2019 v.231 pp. 622-634
ISSN:
0301-4797
Subject:
active sites; adsorbents; affordability; aqueous solutions; dyes; graphene oxide; heavy metals; industrialization; magnetic separation; magnetism; metal ions; nanocomposites; physicochemical properties; pollutants; pollution control; radionuclides; surface area; surface water; toxicity; water purification
Abstract:
... With the rapid growth of industrialization, water bodies are polluted with heavy metals and toxic pollutants. In pursuit of removal of toxic pollutants from the aqueous environment, researchers have been developed many techniques. Among these techniques, magnetic separation has caught research attention, as this approach has shown excellent performance in the removal of toxic pollutants from aqueo ...
DOI:
10.1016/j.jenvman.2018.10.063

4. A highly permeable loose nanofiltration membrane prepared via layer assembled in-situ mineralization

Author:
Jinglong Zhang; Libin Yang; Zhan Wang; Shigang Yang; Ping Li; Peng Song; Min Ban
Source:
Journal of membrane science 2019 v.587 pp. 117159
ISSN:
0376-7388
Subject:
aqueous solutions; artificial membranes; calcium carbonate; dyeing; dyes; humic acids; hydrophilicity; mineralization; nanofiltration; nanoparticles; permeability; sodium chloride; wastewater treatment
Abstract:
... Nanofiltration membrane with high water permeability and anti-fouling nature is particularly needed to be explored in dyeing wastewater treatment. Herein, a hydrophilic calcium carbonate/polyethyleneimine-gallic acid (CaCO3/PEI-GA) loose NF membrane was prepared via a layer assembled in-situ mineralization (LAIM) strategy. This strategy endowed the membrane with the following advantages: the forma ...
DOI:
10.1016/j.memsci.2019.05.083

5. A new uranium bioremediation approach using radio-tolerant Deinococcus radiodurans biofilm

Author:
T Manobala; Sudhir K Shukla; T Subba Rao; M Dharmendira Kumar
Source:
Journal of biosciences 2019 v.44 no.5 pp. 122
ISSN:
0250-5991
Subject:
Deinococcus radiodurans; aqueous solutions; biofilm; bioremediation; calcium; dyes; heavy metals; nitrates; nuclear fuels; uranium; uranyl ions
Abstract:
... Deinococcus radiodurans is the most radiation-tolerant organism ever known. It has gained importance in recent years as a potential candidate for bioremediation of heavy metals, especially the radioactive type. This study investigates the efficiency of a recombinant D. radiodurans (DR1-bf⁺) strain with an ability to form biofilm for uranium remediation. The modified Arsenazo III dye method was use ...
DOI:
10.1007/s12038-019-9942-y

6. A novel environmental-friendly nanobiocomposite synthesis by EDTA and chitosan functionalized magnetic graphene oxide for high removal of Rhodamine B: Adsorption mechanism and separation property

Author:
Niloufar Nekouei Marnani; Afsaneh Shahbazi
Source:
Chemosphere 2019 v.218 pp. 715-725
ISSN:
0045-6535
Subject:
EDTA (chelating agent); Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; chitosan; desorption; dyes; endothermy; experimental design; graphene oxide; kinetics; magnetism; moieties; nanosheets; pH; rhodamines; scanning electron microscopy; sorption isotherms; temperature; thermodynamics; thermogravimetry; zeta potential
Abstract:
... The synergistic combination of two different environmentally friendly functional groups (EDTA and Chitosan) with magnetic graphene oxide (mGO) nano-sheets was used for synthesizing a promising nanobiocomposite adsorbent (CS-EDTA-mGO) for efficient removal of a cationic dye, Rhodamine B (RhB), from aqueous solutions. CS-EDTA-mGO nanobiocomposite was characterized by XRD, FTIR, VSM, TGA, and zeta po ...
DOI:
10.1016/j.chemosphere.2018.11.109

7. A novel positively charged composite nanofiltration membrane based on polyethyleneimine with a tunable active layer structure developed via interfacial polymerization

Author:
Zhibin Jiang; Jing Miao; Yuantao He; Kai Tu; Shunquan Chen; Rui Zhang; Ling Zhang; Hao Yang
Source:
RSC advances 2019 v.9 no.19 pp. 10796-10806
ISSN:
2046-2069
Subject:
ambient temperature; aqueous solutions; calcium chloride; dyes; electrolytes; gold; magnesium chloride; magnesium sulfate; mixing ratio; molecular weight; nanofiltration; organochlorine compounds; polyamides; polyethyleneimine; polymerization; porosity; rhodamines; sodium chloride; sodium sulfate; ultrafiltration; zinc chloride
Abstract:
... A novel positively charged composite nanofiltration (NF) membrane with tunable active layer structure was successfully developed via interfacial polymerization on a polysulfone (PSF) ultrafiltration (UF) membrane surface, using polyethyleneimine (PEI) as the monomer of the aqueous phase, and a mixture of isophthaloyl dichloride (IPC) and tri-mesoyl chloride (TMC) as the monomer of the organic phas ...
DOI:
10.1039/c9ra00253g

8. Acid fuchsin dosimeter: a potential dosimeter for food irradiation dosimetry

Author:
Murtaza Sayed; Safia Tabassum; Noor S. Shah; Javed Ali Khan; Luqman Ali Shah; Faiza Rehman; Sana Ullah Khan; Hasan M. Khan; Mohib Ullah
Source:
Journal of food measurement & characterization 2019 v.13 no.1 pp. 707-715
ISSN:
2193-4126
Subject:
absorbance; absorbed dose; aqueous solutions; bleaching; dosimetry; dyes; food irradiation; gases; heat; nitrogen; nitrous oxide; oxygen; pH; wavelengths
Abstract:
... In this study, for the first-time, aqueous solution of Acid Fuchsin (AF) was spectrophotometrically evaluated as a possible chemical dosimeter for food irradiation dosimetry at low dose ranges. A 50 µM solution of AF at natural pH was gamma irradiated and absorbance of the solution was measured at λₘₐₓ (i.e., 543 nm) in addition to other wavelengths (490, 510, 549 and 564 nm). The response of AF d ...
DOI:
10.1007/s11694-018-9983-1

9. Adsorption and anion exchange insight of indigo carmine onto CuAl-LDH/SWCNTs nanocomposite: kinetic, thermodynamic and isotherm analysis

Author:
Noha Almoisheer; F. A. Alseroury; Rajeev Kumar; M. Aslam; M. A. Barakat
Source:
RSC advances 2019 v.9 no.1 pp. 560-568
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anion exchange; aqueous solutions; carbon nanotubes; dyes; electrostatic interactions; heat production; hydrogen bonding; hydrolysis; hydroxides; indigo carmine; models; nanocomposites; scanning electron microscopy; sorption isotherms; urea; wastewater
Abstract:
... Two-dimensional layered materials are gaining much attention in the field of wastewater purification. Herein, we report the synthesis and characterization of an anion selective copper–aluminum-layered double hydroxide/single-walled carbon nanotubes (CuAl-LDH/SWCNTs) composite for the scavenging of organic dye indigo carmine (IC) from aqueous solution. A facile urea hydrolysis method was used for t ...
DOI:
10.1039/c8ra09562k

10. Adsorption mechanism of polyethyleneimine modified magnetic core–shell Fe₃O₄@SiO₂ nanoparticles for anionic dye removal

Author:
Binyan Huang; Yunguo Liu; Bin Li; Hui Wang; Guangming Zeng
Source:
RSC advances 2019 v.9 no.56 pp. 32462-32471
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; active sites; adsorption; aquatic environment; aqueous solutions; dyes; electrostatic interactions; iron oxides; magnetism; methyl orange; models; nanoparticles; pH; polyethyleneimine; silica; sorption isotherms; thermogravimetry; transmission electron microscopy
Abstract:
... In this paper, polyethyleneimine modified magnetic core–shell Fe₃O₄@SiO₂ nanoparticles (Fe₃O₄@SiO₂/PEI) were innovatively synthesized and investigated using various techniques such as TEM, TGA, FT-IR, XRD, VSM and XPS. The adsorption performance based on the removal of the anionic dyes Methyl orange and Congo red from aqueous solution was studied systematically. The results showed that the adsorpt ...
DOI:
10.1039/c9ra06299h

11. Adsorption of Acidol Red 2BE-NW Dye from Aqueous Solutions on Carboxymethyl Cellulose/Organo-Bentonite Composite: Characterization, Kinetic and Thermodynamic Studies

Author:
Anissa Leshaf; Hocine Ziani Cherif; Kamal Benmansour
Source:
Journal of polymers and the environment 2019 v.27 no.5 pp. 1054-1064
ISSN:
1566-2543
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; aqueous solutions; bentonite; biopolymers; composite materials; dyes; pH; pollutants; pollution control; porosity; scanning electron microscopy; sorption isotherms; surface area; temperature; thermodynamics; thermogravimetry; wastewater
Abstract:
... The combination of biopolymers and clay minerals to form new composite materials offers new horizons and promises to reveal a great potential in the efficient removal of hazardous pollutants from wastewater. The adsorptive removal of Acidol Red 2BE-NW (AR42) with carboxymethyl cellulose/organo-bentonite (CMC/OBent) composite is investigated. The composite is characterized by means of Fourier-trans ...
DOI:
10.1007/s10924-019-01395-1

12. Adsorption of indigo carmine on Pistia stratiotes dry biomass chemically modified

Author:
Rachel M. Ferreira; Nazaré M. de Oliveira; Lorenna L. S. Lima; Ana Laura D. M. Campista; Danielle M. A. Stapelfeldt
Source:
Environmental science and pollution research 2019 v.26 no.28 pp. 28614-28621
ISSN:
1614-7499
Subject:
Pistia stratiotes; adsorbents; adsorption; aquatic plants; aqueous solutions; biomass; biosorbents; drying; dyes; equations; grinding; indigo carmine; sorption isotherms; temperature; washing; Brazil
Abstract:
... Pistia stratiotes is a common aquatic plant of the northern region of the state of Rio de Janeiro, and its use as adsorbent material was studied in the present work. The preparation process included washing, drying, grinding, and acid activation. The sorption potential for removal of the indigo carmine dye from aqueous solutions was tested under various conditions, such as initial concentration, c ...
DOI:
10.1007/s11356-018-3752-x

13. Adsorption removal of cationic dyes from aqueous solutions using ceramic adsorbents prepared from industrial waste coal gangue

Author:
Lu Zhou; Hongjie Zhou; Yuxue Hu; Shu Yan; Jinlong Yang
Source:
Journal of environmental management 2019 v.234 pp. 245-252
ISSN:
0301-4797
Subject:
adsorbents; adsorption; aqueous solutions; ceramics; coal; color; dyes; ecosystem services; electrostatic interactions; hydrogen bonding; industrial wastes; microparticles; pH; solid wastes; sorption isotherms; spray drying; wastewater
Abstract:
... Industrial solid waste coal gangue has huge utilization potential. Low-cost ceramic microsphere adsorbents were prepared from coal gangue by spray drying and sintering method and applied to remove cationic red X-5GN and cationic blue X-GRRL from aqueous solutions. The structural properties of the adsorbents were characterized. Adsorption kinetics, adsorption isotherms and effect of solution pH wer ...
DOI:
10.1016/j.jenvman.2019.01.009

14. Adsorptive removal of anionic dye using calcined oyster shells: isotherms, kinetics, and thermodynamics

Author:
Xayanto Inthapanya; Shaohua Wu; Zhenfeng Han; Guangming Zeng; Mengjie Wu; Chunping Yang
Source:
Environmental science and pollution research international 2019 v.26 no.6 pp. 5944-5954
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; calcium carbonate; dyes; endothermy; models; oyster shells; pH; porosity; scanning electron microscopy; sorption isotherms; surface area; temperature; thermodynamics
Abstract:
... Oyster shells are a type of biogenic materials with excellent characteristics in surface area, porosity, sorption capacity, and high concentration of CaCO₃ (up to 90 wt%), and can be easily converted into a calcium-based alkali adsorbent. In this research, oyster shells calcined at 900 °C were applied as an adsorbent for acid green 25 (AG25) removal from aqueous solutions. The adsorption performan ...
DOI:
10.1007/s11356-018-3980-0

15. Aggregation-Induced Emission and Light-Harvesting Function of Tetraphenylethene-Based Tetracationic Dicyclophane

Author:
Yawen Li; Yunhong Dong; Lin Cheng; Chunyan Qin; Hao Nian; Haiyang Zhang; Yang Yu; Liping Cao
Source:
Journal of the American Chemical Society 2019 v.141 no.21 pp. 8412-8415
ISSN:
1520-5126
Subject:
aqueous solutions; crystal structure; dyes; energy transfer; fluorescence; nanospheres; synthesis; transmission electron microscopy
Abstract:
... Here we report one-pot synthesis of tetraphenylethene-based tetracationic dicyclophane (1) and its self-assembly behaviors with aggregation-induced emission (AIE) and light-harvesting function. Confirmed by X-ray crystal structure and high resolution transmission electron microscopy, this tetracationic dicyclophane can self-assemble into a 3D supramolecular framework to form crystalline nanosphere ...
DOI:
10.1021/jacs.9b02617

16. Anchoring of green synthesized silver nanoparticles onto various surfaces for enhanced heterogeneous removal of brilliant green dye from aqueous solutions with error analysis study

Author:
Rehab G. El-Sharkawy
Source:
Colloids and surfaces 2019 v.583 pp. 123871
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; aqueous solutions; cost effectiveness; decolorization; dyes; endothermy; equations; hydrogen peroxide; models; nanoparticles; nanosilver; orange peels; particle size; sorption isotherms; spectrophotometers; thermal stability; ultraviolet-visible spectroscopy
Abstract:
... Silver nanoparticles (AgNPs) were immobilized onto either an acid or "base-functionalized" orange peel via the green synthesized method and denoted as AgNPs@OP/A and AgNPs@OP/B. FTIR, UV–vis spectra, XRD, and thermogravemetric analysis techniques characterized the samples obtained. The mean particle size of immobilized AgNPs was computed from the XRD pattern based on the plane's line width, refrac ...
DOI:
10.1016/j.colsurfa.2019.123871

17. Anionic channel membrane encircled by SO3H-polyamide 6 particles for removal of anionic dyes

Author:
Shun Ren; Dongqing Liu; Yingbo Chen; Shulin An; Yiping Zhao; Yufeng Zhang
Source:
Journal of membrane science 2019 v.570-571 pp. 34-43
ISSN:
0376-7388
Subject:
anions; aqueous solutions; artificial membranes; coagulation; dyes; filtration; methyl orange; micelles; nanofibers; polyamides; solidification; textile mill effluents
Abstract:
... Membranes of anion channels in matrix were constructed through amphiphilic self-assembly of polyelectrolyte, SO₃H group containing polyamide 6 (SPA6). SPA6 molecules self-aggregated into 255 nm micelles with negative charges at the surface in casting solution. Micelles switched into nanofibers, which formed pompoms of divergent arrangement of nanofibers from the center after immersed in coagulatio ...
DOI:
10.1016/j.memsci.2018.10.025

18. Application of Excess Activated Sludge as Waste Sorbent for Dyes Removal from their Aqueous Solutions

Author:
Barbara Pieczykolan; Izabela Płonka
Source:
Ecological Chemistry and Engineering 2019 v.26 no.4 pp. 773-784
ISSN:
2084-4549
Subject:
activated sludge; aqueous solutions; carbon; color; cosmetics; dyes; fabrics; industry; medicine; models; nitrogen; pH; phosphorus; pollutants; sewage treatment; sorbents; sorption; sorption isotherms; wastewater
Abstract:
... Organic dyes are widely used in many industries (textiles, food, cosmetics, medicine and biology). These plants produce wastewater containing dyes. Even small amounts of dyes can cause a strong colour of wastewater. Therefore, it is very important to effectively remove residues of these pollutants from the wastewater, before discharging them into the environment. The sorption process is one of the ...
DOI:
10.1515/eces-2019-0054

19. Application of response surface methodology for enhanced synthesis of chitosan tripolyphosphate/TiO2 nanocomposite and adsorption of reactive orange 16 dye

Author:
Ahmed Saud Abdulhameed; AbdulKarim-Talaq Mohammad; Ali H. Jawad
Source:
Journal of cleaner production 2019 v.232 pp. 43-56
ISSN:
0959-6526
Subject:
adsorbents; adsorption; analysis of variance; aqueous solutions; chitosan; crosslinking; dyes; electrostatic interactions; experimental design; hydrogen bonding; models; nanocomposites; nanoparticles; pH; polymers; response surface methodology; sorption isotherms; temperature; titanium dioxide
Abstract:
... In this work, Box–Behnken design (BBD) in response surface methodology (RSM) was applied to optimize the synthesis condition of crosslinked chitosan-tripolyphosphate/TiO2 nanocompsite (CCTPP/TiO2 NC) as well as the adsorption conditions of reactive orange dye (RO16) from aqueous solution. The key input factors in this optimization process were loading of TiO2 nanoparticles into CCTPP polymeric mat ...
DOI:
10.1016/j.jclepro.2019.05.291

20. Bioremoval of reactive dye Remazol Navy by kefir grains

Author:
Ali Osman Erdoğdular; Dilek Kılıç Apar
Source:
Applied biological chemistry 2019 v.62 no.1 pp. 22
ISSN:
2468-0842
Subject:
Lactobacillus kefiri; adsorption; aqueous solutions; bacteria; biosorption; dietary supplements; dyes; kefir; kinetics; models; pH; sorption isotherms; yeasts
Abstract:
... Potential use of living and non-living kefir grains (small, gelatinous white/yellow irregularly shaped masses consist of live bacteria and yeasts) on removal of reactive dye Remazol Navy RGB from aqueous solutions were investigated. Experiments were carried out under different process conditions in order to optimize and model the bioremoval processes. At all conditions the living kefir grains exhi ...
DOI:
10.1186/s13765-019-0429-1

21. Biosorption of Rhodamine B onto novel biosorbents from Kappaphycus alvarezii, Gracilaria salicornia and Gracilaria edulis

Author:
A. Selvakumar; S. Rangabhashiyam
Source:
Environmental pollution 2019 v.255 pp. 113291
ISSN:
0269-7491
Subject:
Fourier transform infrared spectroscopy; Gracilaria; Kappaphycus alvarezii; aqueous solutions; batch systems; biosorbents; biosorption; desorption; dyes; ethanol; kinetics; macroalgae; models; pH; rhodamines; sorption isotherms
Abstract:
... In the present investigation seaweeds of macroalgae like Kappaphycus alvarezii, Gracilaria salicornia and Gracilaria edulis used as novel biosorbent in native (KA, GS, GE) and ethanol modified (EKA, EGS, EGE) for Rhodamine B (RB) removal from aqueous solution in batch process. Effect of various biosorption parameters such as pH, initial concentration of RB, biosorbent dosage and contact time were ...
DOI:
10.1016/j.envpol.2019.113291

22. Biosorption of xenobiotic Reactive Black B onto metabolically inactive T. harzianum biomass: optimization and equilibrium studies

Author:
V. Karthik; N. Sivarajasekar; V. C. Padmanaban; E. Nakkeeran; N. Selvaraju
Source:
International journal of environmental science and technology 2019 v.16 no.7 pp. 3625-3636
ISSN:
1735-1472
Subject:
Trichoderma harzianum; adsorbents; adsorption; aqueous solutions; biomass; biosorbents; biosorption; dyes; kinetics; mathematical models; pH; sorption isotherms; temperature; xenobiotics
Abstract:
... Biosorptive removal of Reactive Black B (RBB) from aqueous solution by metabolically inactive Trichoderma harzianum (T. harzianum) was examined in this study. The individual and interactive effects of pH (2.0–10.0), temperature (25–45 °C), initial dye concentration (100–300 mg/L) and adsorbent dosage (0.1–0.5 mg/L) on the biosorption of RBB were evaluated using central composite design (CCD), and ...
DOI:
10.1007/s13762-018-1841-5

23. Cationic functionalization of cellulose monoliths using a urea-choline based deep eutectic solvent and their applications

Author:
Zhaohang Yang; Taka-Aki Asoh; Hiroshi Uyama
Source:
Polymer degradation and stability 2019 v.160 pp. 126-135
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; biodegradability; cationization; cellulose; cellulose acetate; desorption; dyes; mechanical properties; permeability; quaternary ammonium compounds; scanning electron microscopy; separation; solvents; surface area; thermogravimetry; urea
Abstract:
... This study investigates an alternative green strategy based on non-toxic and readily biodegradable chlorocholine chloride/urea deep eutectic solvents (DESs), which act both as functionalization agents and solvents that allow for the cationization of cellulose monoliths to form novel adsorbents for removal of anionic reactive dye from water. Cellulose monolith was produced by deacetylation of cellu ...
DOI:
10.1016/j.polymdegradstab.2018.12.015

24. Characterization and adsorption behaviour of anthill for the removal of anionic dye from aqueous solution

Author:
A. S. Yusuff; O. A. Adesina
Source:
International journal of environmental science and technology 2019 v.16 no.7 pp. 3419-3428
ISSN:
1735-1472
Subject:
adsorbents; adsorption; ant nests; aqueous solutions; color; computer software; dyes; effluents; experimental design; models; pH; sorption isotherms
Abstract:
... The use of commercial adsorbents for the removal of dye from aqueous environment is expensive. Anthill could serve as alternative and cheap adsorbent in treating coloured effluents. However, this study focused on adsorption of dye from aqueous solution by anthill via batch mode process. The anthill was thermally activated at 900 °C for 2 h and then characterized using various techniques. The 2ᵏ fa ...
DOI:
10.1007/s13762-018-1981-7

25. Characterization and adsorptive behaviour of snail shell-rice husk (SS-RH) calcined particles (CPs) towards cationic dye

Author:
Lekan Taofeek Popoola
Source:
Heliyon 2019 v.5 no.1 pp. e01153
ISSN:
2405-8440
Subject:
adsorbents; adsorption; aqueous solutions; dyes; regression analysis; rice hulls; shell (molluscs); snails; sorption isotherms; standard deviation; texture
Abstract:
... In this study, a low-cost composite adsorbent was prepared from snail shell and rice husk (SS-RH) through calcination for brilliant green dye (BGD) adsorption from aqueous solution. Six two-parameter and three three-parameter isotherm models were used to fit the experimental data by both linear and non-linear regression methods using ten error functions. Linear and non-linear regression analysis c ...
DOI:
10.1016/j.heliyon.2019.e01153
PubMed:
30723831
PubMed Central:
PMC6351435

26. Characterization of cellulose–chitosan gels prepared using a LiOH/urea aqueous solution

Author:
Ung-Jin Kim; Satoshi Kimura; Masahisa Wada
Source:
Cellulose 2019 v.26 no.10 pp. 6189-6199
ISSN:
0969-0239
Subject:
adsorption; aqueous solutions; cellulose; chitosan; dyes; ethanol; freeze drying; freeze-thaw cycles; hydrogels; methanol; nitrogen content; pH; porosity; protonation; solvents; strength (mechanics); surface area; thermal analysis; transmittance; urea; washing
Abstract:
... Cellulose–chitosan gels were prepared using a LiOH/urea aqueous solution for a co-dissolution. After cellulose and chitosan were dissolved by a freeze–thaw process, the hydrogels were prepared via regeneration in methanol and washing with water. Finally, freeze-dried cellulose–chitosan gels were obtained via solvent exchange (water → ethanol → t-butyl alcohol) followed by freeze-drying. The chitos ...
DOI:
10.1007/s10570-019-02527-5

27. Chitosan-based magnetic adsorbent for removal of water-soluble anionic dye: Artificial neural network modeling and molecular docking insights

Author:
Corneliu Cojocaru; Petrisor Samoila; Petronela Pascariu
Source:
International journal of biological macromolecules 2019 v.123 pp. 587-599
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; adsorbents; adsorption; algorithms; aqueous solutions; chitosan; composite materials; computer simulation; crosslinking; decolorization; dyes; electrostatic interactions; energy-dispersive X-ray analysis; ferrimagnetic materials; glutaraldehyde; hydrogen bonding; hydrophobicity; ion exchange; magnetism; neural networks; pH; scanning electron microscopy; water solubility
Abstract:
... Herein, we report a new composite magnetic-adsorbent made of doped spinel ferrite (15%) dispersed throughout a matrix of chitosan (CS) cross-linked with glutaraldehyde (GA). The composite material was well characterized by using instrumental methods of physical-chemical analysis (SEM, EDX, FTIR and VSM). The produced adsorbent was applied for the removal of Acid Orange 7 (AO7) dye from aqueous sol ...
DOI:
10.1016/j.ijbiomac.2018.11.080

28. Chlorine-resistant polyester thin film composite nanofiltration membranes prepared with β-cyclodextrin

Author:
Jing Xue; Zhiwei Jiao; Ran Bi; Runnan Zhang; Xinda You; Fei Wang; Linjie Zhou; Yanlei Su; Zhongyi Jiang
Source:
Journal of membrane science 2019 v.584 pp. 282-289
ISSN:
0376-7388
Subject:
aqueous solutions; beta-cyclodextrin; chlorine; cleaning; dyes; hydrophilicity; moieties; nanofiltration; organochlorine compounds; polyesters; polymerization; sodium hypochlorite; thin film composite membranes; water treatment
Abstract:
... The chlorine resistance is recognized as one of the crucial and essential properties of membranes in water treatment field. In this study, β-cyclodextrin (β-CD) with abundant hydrophilic hydroxyl groups as aqueous phase monomer and trimesoyl chloride (TMC) as organic phase monomer were utilized to fabricate the polyester thin film composite (TFC) nanofiltration (NF) membranes by interfacial polyme ...
DOI:
10.1016/j.memsci.2019.04.077

29. Colorimetric detection of Ni2+ based on an anionic triphenylmethane dye and a cationic polyelectrolyte in aqueous solution

Author:
Yasumasa Fukushima; Shunichi Aikawa
Source:
Tetrahedron letters 2019 v.60 no.9 pp. 675-680
ISSN:
0040-4039
Subject:
aqueous solutions; chemical reactions; chemical structure; color; colorimetry; dyes; metal ions; nickel; quaternary ammonium compounds; water solubility
Abstract:
... The combination of xylenol orange (XO) and poly(diallyldimethylammonium chloride) (PDADMAC) has been utilized as a colorimetric sensor for selective recognition of Ni2+ in aqueous solution. Upon addition of Ni2+, the chemosensor exhibited the significant color change from red to purple with a bathochromic shift, whereas these change was not induced by other metal ions. XO alone did not recognize N ...
DOI:
10.1016/j.tetlet.2019.01.055

30. Colorimetric detection of spermine and spermidine by zincon in aqueous solution

Author:
Yasumasa Fukushima; Shunichi Aikawa
Source:
Tetrahedron letters 2019 v.60 no.49 pp. 151302
ISSN:
0040-4039
Subject:
amino acids; aqueous solutions; chemical reactions; chemical structure; color; colorimetry; detection limit; dyes; electrostatic interactions; neoplasms; pH; spermidine; spermine; stoichiometry; titration
Abstract:
... The anionic organic dye, zincon, was found to be a colorimetric probe for spermine and spermidine at pH 4.0 in pure aqueous solution through its aggregation by electrostatic interactions with them. The addition of spermine and spermidine led to bathochromic shifts with color changes from yellow to purple and dark brown, respectively, while other amines and basic amino acids induced no or minimal s ...
DOI:
10.1016/j.tetlet.2019.151302

31. Comparison between catalytic activities of two zinc layered hydroxide salts in brilliant green organic dye bleaching

Author:
Murilo Gonçalves da Rocha; Shirley Nakagaki; Geani Maria Ucoski; Fernando Wypych; Guilherme Sippel Machado
Source:
Journal of colloid and interface science 2019 v.541 pp. 425-433
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; ammonia; aqueous solutions; bleaching; catalysts; catalytic activity; dyes; electron paramagnetic resonance spectroscopy; human health; hydrogen peroxide; ions; nitrates; oxidants; superoxide anion; temperature; toxicity; wastewater treatment; zinc
Abstract:
... This paper reports the use of two layered hydroxide salts (LHS) (zinc hydroxide nitrate – ZHN – Zn5(OH)8(NO3)2·2H2O, and zinc hydroxide chloride – ZHC – Zn5(OH)8Cl2·H2O) as catalysts for brilliant green (BG) organic dye bleaching, using hydrogen peroxide as oxidant. The LHS were prepared by precipitation reaction between an aqueous solution of zinc salts and an aqueous ammonia solution. The solids ...
DOI:
10.1016/j.jcis.2019.01.111

32. Composite nanofiltration membrane with asymmetric selective separation layer for enhanced separation efficiency to anionic dye aqueous solution

Author:
Zhenhua Lü; Feng Hu; Haiyan Li; Xiru Zhang; Sanchuan Yu; Meihong Liu; Congjie Gao
Source:
Journal of hazardous materials 2019 v.368 pp. 436-443
ISSN:
0304-3894
Subject:
alizarin; antifouling activities; aqueous solutions; asymmetric membranes; chemical bonding; dyes; esterification; glucose; models; nanofiltration; permeability; piperazine; tannins; textile industry; wastewater
Abstract:
... The development of high performance membrane is crucial for enhanced separation efficiency of nanofiltration process in treating wastewaters from dye and textile industries. In this work, a novel thin-film composite nanofiltration membrane with an asymmetric separation layer composed of relatively compact skin and loose body was designed and fabricated for improved perm-selectivity and antifouling ...
DOI:
10.1016/j.jhazmat.2019.01.086

33. Conformational Selection in Anion Recognition: cGMP-Selective Binding by a Naphthalimide-Functionalized Amido-Amine Macrocycle

Author:
Aleksandr S. Oshchepkov; Tatiana A. Shumilova; Mario Zerson; Robert Magerle; Victor N. Khrustalev; Evgeny A. Kataev
Source:
Journal of organic chemistry 2019 v.84 no.14 pp. 9034-9043
ISSN:
1520-6904
Subject:
X-radiation; aqueous solutions; chemical structure; conformational isomerization; cyclic GMP; dyes; fluorescence; geometry; macrocyclization reactions; models; nucleosides; oligonucleotides; organic chemistry; organic compounds; proteins
Abstract:
... Amido-amine macrocycles with two and four naphthalimide dyes were designed to bind nucleoside monophosphates and oligonucleotides in an aqueous buffered solution. Anion-templated synthesis was used to direct the macrocyclization reaction to the [2+2] product, while high dilution conditions favored the formation of the [4+4] macrocycle with an unprecedented geometry, as revealed from the X-ray anal ...
DOI:
10.1021/acs.joc.9b00947

34. Controlling Self-Assembly with Light and Temperature

Author:
Nico Carl; Wenke Müller; Ralf Schweins; Klaus Huber
Source:
Langmuir 2019 v.36 no.1 pp. 223-231
ISSN:
1520-5827
Subject:
aqueous solutions; cis-trans isomers; dyes; electrolytes; isomerization; neutron diffraction; polyacrylic acid; sodium; solubility; temperature; ultraviolet radiation
Abstract:
... Complexes between the anionic polyelectrolyte sodium polyacrylate (PA) and an oppositely charged divalent azobenzene dye are prepared in aqueous solution. Depending on the ratio between dye and polyelectrolyte stable aggregates with a well-defined spherical shape are observed. Upon exposure of these complexes to UV light, the trans → cis transition of the azobenzene is excited resulting in a bette ...
DOI:
10.1021/acs.langmuir.9b03040

35. Copper and cerium co-doped cobalt ferrite nanoparticles: structural, morphological, optical, magnetic, and photocatalytic properties

Author:
Venkat Savunthari Kirankumar; Shanmugam Sumathi
Source:
Environmental science and pollution research international 2019 v.26 no.19 pp. 19189-19206
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aqueous solutions; bisphenol A; cerium; cobalt; copper; copper nanoparticles; dyes; energy; energy-dispersive X-ray analysis; ferrimagnetic materials; lighting; magnetism; photocatalysis; scanning electron microscopy; spectrometers; transmission electron microscopy; ultraviolet radiation
Abstract:
... A rapid synthetic technique is investigated for magnetic nanoparticles (Co₁₋yCuyFe₂₋ₓCeₓO₄ (x = 0, y = 0), (x = 0.05, y = 0), (x = 0, y = 0.5), and (x = 0.05, y = 0.5)). The structure, morphology, optical and magnetic performance of prepared nanoparticles are analyzed by powder XRD, XPS, FT-IR, SEM-EDAX, TEM, DRS, and VSM. The photocatalytic activity of the synthesized nanoparticles for the remova ...
DOI:
10.1007/s11356-019-05286-9

36. Cotton functionalized with nanostructured TiO2-Ag-AgBr layer for solar photocatalytic degradation of dyes and toxic organophosphates

Author:
S. Boufi; M. Abid; S. Bouattour; A.M. Ferraria; D.S. Conceição; L.F. Vieira Ferreira; G. Corbel; P.M. Neto; P.A. Lopes; M. Rei Vilar; A.M. Botelho do Rego
Source:
International journal of biological macromolecules 2019 v.128 pp. 902-910
ISSN:
0141-8130
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; absorption; aqueous solutions; bromine; clothing; cotton; cotton fabric; dyes; light; nanocrystals; nanoparticles; nanosilver; organophosphorus compounds; photocatalysis; silver; surface plasmon resonance; temperature; titanium dioxide; toxic substances; toxicity
Abstract:
... The functionalization of cotton fabric with photoactive TiO₂-Ag-AgBr nanostructured layer has been successfully developed using a low temperature non-aqueous sol-gel route and aqueous suspension of AgBr. Evidence for the growth of TiO₂ layer and the immobilization of AgBr nanoparticles have been confirmed by Raman, XRD and XPS. GSDR analysis revealed a strong absorption in the visible region broug ...
DOI:
10.1016/j.ijbiomac.2019.01.218

37. Could the porous chitosan-based composite materials have a chance to a “NEW LIFE” after Cu(II) ion binding?

Author:
Maria Marinela Lazar; Ionel Adrian Dinu; Mihaela Silion; Ecaterina Stela Dragan; Maria Valentina Dinu
Source:
International journal of biological macromolecules 2019 v.131 pp. 134-146
ISSN:
0141-8130
Subject:
aqueous solutions; biosorbents; biosorption; catalysts; catalytic activity; composite materials; copper; decolorization; dyes; hydrogen peroxide; metal ions; methyl orange; remediation; wastewater
Abstract:
... Currently, biosorption is considered a leading-edge environmentally-friendly method for the low-cost remediation of wastewaters contaminated with metal ions. However, the safe disposal of metal-loaded biosorbents is still a challenging issue. In this context, our major objective was to explore the possibility of “waste minimization” by reusing the metal-loaded biosorbents in further environmental ...
DOI:
10.1016/j.ijbiomac.2019.03.055

38. Covalent Construction of Sustainable Hybrid UiO-66-NH₂@Tb-CP Material for Selective Removal of Dyes and Detection of Metal Ions

Author:
Qiangsheng Zhang; Xue Jiang; Alexander M. Kirillov; Yanwen Zhang; Mingyang Hu; Wei Liu; Lizi Yang; Ran Fang; Weisheng Liu
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.3 pp. 3203-3212
ISSN:
2168-0485
Subject:
absorption; active sites; adsorption; aqueous solutions; cerium; chemical bonding; coordination polymers; copper; desorption; dyes; green chemistry; luminescence; metal ions; public health; solvents; surface area; toxicity; zirconium
Abstract:
... The development of quick and effective strategies for the removal of organic dyes and the detection of metal ions in aqueous solutions remains a challenge for protecting the public health and environment. Multifunctional materials that combine both the dye-adsorption and pollutant-detection functions rarely have been explored. In this work, a 2D Tb(III) coordination polymer (Tb-CP) was directly as ...
DOI:
10.1021/acssuschemeng.8b05146

39. Cucurbituril-Based Reusable Nanocomposites for Efficient Molecular Encapsulation

Author:
Huifang Liu; Yange Luan; Bonhan Koo; Eun Yeong Lee; Jinmyoung Joo; Thuy Nguyen Thi Dao; Fei Zhao; Linlin Zhong; Kyusik Yun; Yong Shin
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.5 pp. 5440-5448
ISSN:
2168-0485
Subject:
aqueous solutions; chemical bonding; commercialization; diatomaceous earth; dyes; electrostatic interactions; encapsulation; energy conversion; engineering; macrocyclic compounds; nanocomposites; pathogens; solar cells; solubility; water purification
Abstract:
... Cucurbituril (CB) has recently been employed in many fields, including water purification, solar cells, energy conversion, and biomedical engineering. However, the poor solubility of CB poses a serious obstacle to the further development of CB applications. To enhance the solubility of members of the CB family (CB[5–8]) by preventing self-aggregation in aqueous solutions, the synthesis of highly s ...
DOI:
10.1021/acssuschemeng.8b06506

40. Decoupling pH Dependence of Flat Band Potential in Aqueous Dye-Sensitized Electrodes

Author:
Yongze Yu; Kevin A. Click; Szu-Chia Chien; Jiaonan Sun; Allison Curtze; Li-Chiang Lin; Yiying Wu
Source:
Journal of physical chemistry 2019 v.123 no.14 pp. 8681-8687
ISSN:
1932-7455
Subject:
aqueous solutions; carbon dioxide; deprotonation; dyes; electrodes; electrolytes; energy; formic acid; hydrogen; hydrophobicity; nickel oxide; pH; physical chemistry; protons; redox reactions; semiconductors
Abstract:
... When a semiconductor is in contact with an electrolyte, its flat band potential (EFB) is an important quantity for determining band edge positions in photoelectrochemistry. Oxide semiconductors generally have a EFB shift of −59 mV in aqueous solutions when the pH is increased by 1 unit as a consequence of surface deprotonation. Many of the most desirable redox reactions, such as the reduction of C ...
DOI:
10.1021/acs.jpcc.9b00710

41. Determination of phosphate anions with a near-infrared heptamethine cyanine dye in a neutral aqueous solution

Author:
Xia Gao; Jie Xu; Baoxian Ye; Weidong Wu; Hong Zheng
Source:
Analytical methods 2019 v.11 no.20 pp. 2677-2682
ISSN:
1759-9679
Subject:
absorbance; adenosine diphosphate; adenosine triphosphate; analytical methods; anions; aqueous solutions; dyes; humans; phosphates; saliva; terbium
Abstract:
... A novel absorbance recovery method has been developed for the determination of phosphate anions with a near-infrared reagent. This method employs a two-reagent system composed of anionic heptamethine cyanine (HMC) and Tb³⁺. The absorbance of HMC, with a maximum peak at 778 nm, was decreased due to addition of Tb³⁺ in appropriate concentrations, but recovered when phosphate anions were added. Under ...
DOI:
10.1039/c9ay00425d

42. Development of Graphene Oxide Framework Membranes via the “from” and “to” Cross-Linking Approach for Ion-Selective Separations

Author:
Sahadevan Rajesh; Anima. B. Bose
Source:
ACS applied materials & interfaces 2019 v.11 no.31 pp. 27706-27716
ISSN:
1944-8252
Subject:
aqueous solutions; crosslinking; dyes; graphene oxide; methyl orange; moieties; nanofiltration; nanosheets; oxidation; permeability; polyethyleneimine; rhodamines; sodium sulfate; thiourea
Abstract:
... Graphene oxide (GO) membranes with well-defined nanochannels formed between the stacked GO nanosheets find great interest in molecular separations. However, GO membranes are unstable in aqueous solution environments because of weak interactions between the stacked nanosheets. Herein, we developed a preparation method by diminishing the self-contained oxidized functional groups in GO and subsequent ...
DOI:
10.1021/acsami.9b05465

43. Development of high flux nanofiltration membranes through single bilayer polyethyleneimine/alginate deposition

Author:
Önder Tekinalp; Sacide Alsoy Altinkaya
Source:
Journal of colloid and interface science 2019 v.537 pp. 215-227
ISSN:
0021-9797
Subject:
adsorption; alginates; aqueous solutions; bovine serum albumin; crosslinking; dyes; electrolytes; ionic strength; moieties; molecular weight; nanofiltration; pH; permeability; polyethylene glycol; polyethyleneimine; ultrafiltration
Abstract:
... The aim of this study is to prepare high flux, stable, antifouling nanofiltration membranes through single bilayer polyelectrolyte deposition. To this end, a tight ultrafiltration support membrane was prepared from a polysulfone/sulfonated polyethersulfone blend. Deposition of a polyethyleneimine and alginate pair on this support has reduced the molecular weight cut off from 6 kDa to below 1 kDa. ...
DOI:
10.1016/j.jcis.2018.10.089

44. Diffusion Behavior of Differently Charged Molecules in Self-Assembled Organic Nanotubes Studied Using Imaging Fluorescence Correlation Spectroscopy

Author:
Govinda Ghimire; Roberto Espinoza; Hao Xu; Shinobu Nagasaka; Naohiro Kameta; Mitsutoshi Masuda; Daniel A. Higgins; Takashi Ito
Source:
Langmuir 2019 v.35 no.24 pp. 7783-7790
ISSN:
1520-5827
Subject:
adsorbents; ammonium; aqueous solutions; diffusivity; drugs; dyes; electrostatic interactions; fluorescence; fluorescence correlation spectroscopy; glucose; image analysis; ionic strength; microscopy; nanotubes; pH; protonation; rhodamines; solutes; zwitterions
Abstract:
... The diffusion behavior of fluorescent molecules within bolaamphiphile-based organic nanotubes (ONTs) was systematically investigated using imaging fluorescence correlation spectroscopy (imaging FCS). Anionic sulforhodamine B, zwitterionic/cationic rhodamine B, or cationic rhodamine 123 was loaded into ONTs having cylindrical hollow structures (ca. 10 nm in inner diameter) with amine and glucose gr ...
DOI:
10.1021/acs.langmuir.9b01022

45. Direct Z-scheme CaTiO3@BiOBr composite photocatalysts with enhanced photodegradation of dyes

Author:
Yuxiang Yan; Hua Yang; Zao Yi; Tao Xian; Xiangxian Wang
Source:
Environmental science and pollution research international 2019 v.26 no.28 pp. 29020-29031
ISSN:
0944-1344
Subject:
aqueous solutions; dielectric spectroscopy; dyes; electric current; electron transfer; lighting; models; nanoparticles; photocatalysis; photocatalysts; photoluminescence; photolysis; pollutants; rhodamines; transmission electron microscopy
Abstract:
... To efficiently separate photoexcited electron/hole pairs is one of the key points for achieving excellent photocatalysts with high photocatalytic performances. To achieve this aim, here we have assembled CaTiO₃ (CTO) nanoparticles onto BiOBr microplates, thus constructing novel Z-scheme CTO@BiOBr heterojunction composite photocatalysts. Observation by scanning/transmission electron microscopy conf ...
DOI:
10.1007/s11356-019-06085-y

46. Direct red 81 adsorption on iron filings from aqueous solutions; kinetic and isotherm studies

Author:
Mansooreh Dehghani; Majid Nozari; Atefeh Fakhraei Fard; Marziyeh Ansari Shiri; Narges Shamsedini
Source:
Environmental technology 2019 v.40 no.13 pp. 1705-1713
ISSN:
1479-487X
Subject:
adsorbents; adsorption; aqueous solutions; dyes; iron; models; pH; sorption isotherms; textile industry; water solubility
Abstract:
... Direct Red 81 (DR-81) dye with a very high water solubility is widely used in many industries particularly textile industries. This study aimed to evaluate the practicability of using iron filings for the adsorption of DR-81 dye from the aqueous solutions. The effects of pH, adsorbent dose, initial DR-81 dye concentration, and adsorption time on adsorption process were also evaluated. The maximum ...
DOI:
10.1080/09593330.2018.1428228

47. Dye-Mediated Interactions in Chitosan-Based Polyelectrolyte/Organoclay Hybrids for Enhanced Adsorption of Industrial Dyes

Author:
Peng Huang; Dong Xia; Algy Kazlauciunas; Paul Thornton; Long Lin; Robert Menzel
Source:
ACS applied materials & interfaces 2019 v.11 no.12 pp. 11961-11969
ISSN:
1944-8252
Subject:
adsorbents; adsorption; anthraquinones; aqueous solutions; crosslinking; dyes; electrolytes; flocculation; industrial wastewater; models; small-angle X-ray scattering
Abstract:
... Noncovalent, dye-mediated interactions between organo-montmorillonites (“organoclays”) and a chitosan-based polyelectrolyte are exploited for highly effective and fast removal of different, industrially important anionic dyes (single-azo, double-azo, and anthraquinone) from aqueous solutions. The addition of only 10 wt % of the polyelectrolyte to conventional organoclay results in a 100% increase ...
DOI:
10.1021/acsami.9b01648

48. Effective removal of methyl orange and rhodamine B from aqueous solution using furfural industrial processing waste: Furfural residue as an eco-friendly biosorbent

Author:
Xiaoyan Chen; Heping Li; Wanyi Liu; Xia Zhang; Zhiqiang Wu; Shuxian Bi; Weiwei Zhang; Haijuan Zhan
Source:
Colloids and surfaces 2019 v.583 pp. 123976
ISSN:
0927-7757
Subject:
adsorbents; adsorption; aqueous solutions; biosorbents; carbonization; dyes; electrostatic interactions; furfural; heat production; hydrogen bonding; hydrophilicity; metals; methyl orange; moieties; processing technology; processing waste; rhodamines; temperature; vapors
Abstract:
... In this study, furfural residue (FR) raw sample as an adsorbent was obtained from the known furfural waste, and without activation by other physical and chemical methods such as activation with metals and/or vapor, carbonization, which was only washed and dried and applied to remove anionic methyl orange (MO) and cationic rhodamine B (RhB) from aqueous solution. Characterization results confirmed ...
DOI:
10.1016/j.colsurfa.2019.123976

49. Effectiveness of the dispersion of iron nanoparticles within micropores and mesopores of activated carbon for Rhodamine B removal in wastewater by the heterogeneous Fenton process

Author:
Bi Gouessé Henri Briton; Laurent Duclaux; Yohan Richardson; Kouassi Benjamin Yao; Laurence Reinert; Yasushi Soneda
Source:
Applied water science 2019 v.9 no.7 pp. 166
ISSN:
2190-5487
Subject:
X-ray photoelectron spectroscopy; activated carbon; aqueous solutions; bananas; catalysts; catalytic activity; discoloration; dyes; hydrogen peroxide; iron; micropores; mineralization; nanoparticles; pH; porosity; porous media; pyrolysis; rhodamines; sulfates; temperature; transmission electron microscopes; wastewater
Abstract:
... Iron-based nanoparticles were formed in the pores of a micro- and mesoporous activated carbon made from banana spike by the impregnation of iron sulfate at various ratios and further pyrolysis, in order to prepare three catalysts AC@Fe/1, AC@Fe/2, AC@Fe/3 having iron mass contents of 1.6%, 2.2% and 3.3%, respectively. The pore size distributions, transmission electron microscope observations and X ...
DOI:
10.1007/s13201-019-1047-0

50. Efficient combined near-infrared-triggered therapy: Phototherapy over chemotherapy in chitosan-reduced graphene oxide-IR820 dye-doxorubicin nanoplatforms

Author:
Diana Zaharie-Butucel; Monica Potara; Sorina Suarasan; Emilia Licarete; Simion Astilean
Source:
Journal of colloid and interface science 2019 v.552 pp. 218-229
ISSN:
0021-9797
Subject:
Raman imaging; antineoplastic activity; aqueous solutions; colorectal neoplasms; doxorubicin; dyes; graphene; graphene oxide; heat; irradiation; mice; nanomaterials; near-infrared spectroscopy; neoplasm cells; optical properties; phototherapy; singlet oxygen
Abstract:
... Significant efforts are currently being funneled into the improvement of therapeutic outcomes in cancer by designing hybrid nanomaterials that synergistically combine chemotherapeutic abilities and near-infrared (NIR) light-activated photothermal (PTT) and photodynamic (PDT) activity. Herein, a nanotherapeutic platform is specifically designed to integrate combinational functionalities: chemothera ...
DOI:
10.1016/j.jcis.2019.05.050

51. Efficient removal of Alizarin Red S from aqueous solution by polyethyleneimine functionalized magnetic carbon nanotubes

Author:
Zhifeng Zhang; Huijuan Chen; Wenmei Wu; Wenting Pang; Guiqin Yan
Source:
Bioresource technology 2019 v.293 pp. 122100
ISSN:
0960-8524
Subject:
adsorbents; adsorption; alizarin; ambient temperature; aqueous solutions; carbon nanotubes; dyeing; dyes; industry; magnetic materials; pH; polyethyleneimine; sorption isotherms; wastewater; wastewater treatment
Abstract:
... Alizarin Red S (ARS) has been extensively used in the dyeing industry. In order to effectively remove the ARS form dyeing wastewater, polyethyleneimine (PEI)-functionalized magnetic carbon nanotubes (PEI@MCNTs) adsorbent was successfully prepared and its adsorption performances were also investigated in detail. The PEI@MCNTs could efficiently remove the ARS from acidic aqueous solution (pH ≤ 6.0) ...
DOI:
10.1016/j.biortech.2019.122100

52. Efficient removal of ethidium bromide from aqueous solution by using DNA-loaded Fe3O4 nanoparticles

Author:
Zhiqiang Ge; Tingting Sun; Jinfeng Xing; Xuejiao Fan
Source:
Environmental science and pollution research international 2019 v.26 no.3 pp. 2387-2396
ISSN:
0944-1344
Subject:
DNA; Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; batch systems; carcinogens; chemical bonding; crystal structure; dyes; ethidium; heat production; iron oxides; magnetism; models; mutagens; nanoparticles; pH; reaction kinetics; scanning electron microscopy; sorption isotherms; temperature; transmission electron microscopy; zeta potential
Abstract:
... Ethidium bromide (EtBr) is widely used as DNA-staining dyes for the detection of nucleic acids in laboratories and known to be powerful mutagens and carcinogens. In the present paper, the removal of EtBr from aqueous solutions in a batch system using DNA-loaded Fe₃O₄ nanoparticles as a simple and efficient method was investigated. DNA was covalently loaded on the surface of Fe₃O₄ magnetic nanopart ...
DOI:
10.1007/s11356-018-3747-7

53. Enhanced adsorption of Orange G from aqueous solutions by quaternary ammonium group-rich magnetic nanoparticles

Author:
Xinyu Zheng; Huaili Zheng; Yuhao Zhou; Yongjun Sun; Rui Zhao; Yongzhi Liu; Shixin Zhang
Source:
Colloids and surfaces 2019 v.580 pp. 123746
ISSN:
0927-7757
Subject:
adsorbents; adsorption; aqueous solutions; dyes; electrostatic interactions; endothermy; human health; ionic strength; iron oxides; magnetic fields; models; nanoparticles; pH; polymerization; quaternary ammonium compounds; sorption isotherms; thermodynamics; wastewater
Abstract:
... Wastewater containing dyes poses a severe threat to human health and to environmental safety. Hence, finding an effective way to treat this wastewater has attracted wide attentions. In this study, quaternary ammonium group-rich magnetic nanoparticles (MNPs), Fe₃O₄@SiO₂-MPS-g-DAC (FSMD), were facilely prepared by grafting polymerization and served as a cationic adsorbent to remove anionic dye Orang ...
DOI:
10.1016/j.colsurfa.2019.123746

54. Enhanced dyes adsorption from wastewater via Fe3O4 nanoparticles functionalized activated carbon

Author:
Xiaoduo Liu; Jiefu Tian; Yuanyuan Li; Ningfei Sun; Shu Mi; Yong Xie; Ziyu Chen
Source:
Journal of hazardous materials 2019 v.373 pp. 397-407
ISSN:
0304-3894
Subject:
activated carbon; adsorbents; adsorption; aqueous solutions; dyes; equations; heat production; iron oxides; magnetic separation; magnetism; methyl orange; models; moieties; nanoparticles; physicochemical properties; purification methods; rhodamines; surface area; wastewater; wastewater treatment
Abstract:
... Fe₃O₄ nanoparticles functionalized activated carbon (Fe₃O₄/AC) as an adsorbent was prepared and used for fast and effectively removing rhodamine B (RhB) and methyl orange (MO) from aqueous solution. Its physical and chemical properties characterized indicate that the adsorbent possesses abundant surface functional groups, sensitive magnetic response and enhanced specific surface area. Batch experi ...
DOI:
10.1016/j.jhazmat.2019.03.103

55. Enhanced removal of Orange G from aqueous solutions by modified chitosan beads: Performance and mechanism

Author:
Zetty Azalea Sutirman; Mohd Marsin Sanagi; Khairil Juhanni Abd Karim; Ahmedy Abu Naim; Wan Aini Wan Ibrahim
Source:
International journal of biological macromolecules 2019 v.133 pp. 1260-1267
ISSN:
0141-8130
Subject:
adsorbents; adsorption; aqueous solutions; batch systems; chitosan; crosslinking; dyes; kinetics; models; pH; sorption isotherms
Abstract:
... Grafting of crosslinked chitosan with monomer, N-vinyl-2-pyrrolidone, has been carried out to investigate its adsorption capacity toward Orange G (OG) from aqueous solutions. The adsorption performance of modified chitosan (cts(x)-g-PNVP) was examined and compared with that of the unmodified chitosan. The effects of initial pH, contact time and initial dye concentration were investigated in a batc ...
DOI:
10.1016/j.ijbiomac.2019.04.188

56. Fabrication of chitosan/alginate porous sponges as adsorbents for the removal of acid dyes from aqueous solution

Author:
Mengxiang Zeng; Wei Wu; Jianjun Fang; Sufang Li; Zhihua Zhou
Source:
Journal of materials science 2019 v.54 no.13 pp. 9995-10008
ISSN:
0022-2461
Subject:
adsorbents; adsorption; alginates; aqueous solutions; chitosan; dyes; electrostatic interactions; freeze drying; freezing; pH; remediation; wastewater
Abstract:
... Effective wastewater remediation requires the development of suitable adsorbents. In this study, a strategy based on electrostatic interactions between the amino groups of chitosan and the anionic groups of acid dyes was developed for the removal of acid dyes from aqueous solution. By adjusting the fabrication parameters, chitosan/alginate porous sponges with controlled specific areas and pore str ...
DOI:
10.1007/s10853-019-03602-9

57. Fabrication of phosphonium bamboo cellulose by triphenylphosphine: preparation, characterization, and adsorption of Acid Black 24

Author:
Wei Xiong; Dongying Hu
Source:
Environmental science and pollution research international 2019 v.26 no.2 pp. 1880-1891
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; activation energy; adsorbents; adsorption; aqueous solutions; bamboos; biomass; cellulose; chemical structure; dyes; endothermy; models; pH; purification methods; scanning electron microscopy; sorption isotherms; temperature
Abstract:
... Cellulose from bamboo shavings (BC) separated and modified by grafting triphenylphosphine, which was used as an adsorbent for the removal of Acid Black 24 from aqueous solution. The quaternary phosphonium-based bamboo cellulose (PBC) was characterized by FTIR and SEM measurements. The FTIR studies showed that the quaternary phosphonium group was successfully grafted onto the BC molecular structure ...
DOI:
10.1007/s11356-018-3711-6

58. Facile fabrication of quaternary water soluble chitosan-sodium alginate gel and its affinity characteristic toward multivalent metal ion

Author:
Yinghao Fu; Congming Xiao; Juan Liu
Source:
Environmental technology & innovation 2019 v.13 pp. 340-345
ISSN:
2352-1864
Subject:
adsorption; ammonium salts; aqueous solutions; chitosan; copper; dyes; environmental technology; gels; lead; metal ions; quaternary ammonium compounds; rhodamines; sodium alginate; water solubility
Abstract:
... A novel chitosan-based gel-capsule that exhibited excellent adsorption property was facilely generated. Firstly, a gel was formed from quaternary ammonium salt of water soluble chitosan and acted as a dissolvable core. Then, a polymeric shell was formed via immersing the gel in the aqueous solution of sodium alginate. The obtained complex gel was able to convert into a stable gel-capsule through i ...
DOI:
10.1016/j.eti.2019.01.007

59. Facile preparation of luminescent cellulose nanocrystals with aggregation-induced emission feature through Ce(IV) redox polymerization

Author:
Yi Cui; Hongye Huang; Meiying Liu; Junyu Chen; Fengjie Deng; Naigen Zhou; Xiaoyong Zhang; Yen Wei
Source:
Carbohydrate polymers 2019 v.223 pp. 115102
ISSN:
0144-8617
Subject:
aqueous solutions; biocompatibility; biodegradability; cellulose; cytotoxicity; dyeing; dyes; fluorescence; hydrophilicity; moieties; nanocrystals; polyethylene glycol; polymerization; temperature
Abstract:
... Cellulose nanocrystals (CNCs) are a novel type of natural nanomaterials that have attracted tremendous research interest for various applications especially in the biomedical fields owing to their natural origin, biodegradable potential, remarkable biocompatibility and massive reactive hydroxyl groups. In this work, a novel strategy has been developed for fabrication of luminescent CNCs with aggre ...
DOI:
10.1016/j.carbpol.2019.115102

60. Facile synthesis of a micro-scale MOF host–guest with long-lasting phosphorescence and enhanced optoelectronic performance

Author:
Xiao-Gang Yang; Xiao-Min Lu; Zhi-Min Zhai; Ying Zhao; Xin-Yi Liu; Lu-Fang Ma; Shuang-Quan Zang
Source:
Chemical communications 2019 v.55 no.74 pp. 11099-11102
ISSN:
1364-548X
Subject:
aqueous solutions; chemical compounds; color; dyes; encapsulation; phosphorescence; photocatalysis
Abstract:
... Micro-scale MOFs with a persistent phosphorescence lifetime of 900 ms can be facilely synthesized by a fast precipitation process in aqueous solution. The in situ encapsulation of a dye into the MOF matrix can expressly tune the phosphorescence color from green to a rare example of red emission with a lifetime of 450 ms, highly enhancing the photoelectrocatalytic water splitting. ...
DOI:
10.1039/c9cc05708k

61. Fluorescent determination of micro-quantities of RNA using Hoechst 33258 and binase

Author:
A.N. Doynikova; N.L. Vekshin
Source:
Analytical biochemistry 2019 v.576 pp. 5-8
ISSN:
0003-2697
Subject:
ambient temperature; aqueous solutions; dyes; enzymes; fluorescence; fluorescence emission spectroscopy; hydrolysis; oligonucleotides; physicochemical properties; ribonucleotides; ribosomal RNA; transfer RNA
Abstract:
... Detection of small amounts of RNA in various biological samples is an important applied task. Using fluorescence spectroscopy, the hydrolysis by binase of rRNA and tRNA, stained with Hoechst 33258, in aqueous solutions was investigated. The binding constant of Hoechst with rRNA is 106 M−1. Specific hydrolysis of rRNA and tRNA by binase during 1–2 min at room temperature leads to a multiple decreas ...
DOI:
10.1016/j.ab.2019.04.002

62. Fullerene-Directed Synthesis of Flowerlike Cu₃(PO₄)₂ Crystals for Efficient Photocatalytic Degradation of Dyes

Author:
Mengjun Chen; Geping Zhang; Yue Jiang; Keyang Yin; Linwen Zhang; Hongguang Li; Jingcheng Hao
Source:
Langmuir 2019 v.35 no.26 pp. 8806-8815
ISSN:
1520-5827
Subject:
adsorption; aqueous solutions; biomineralization; cations; copper sulfate; crystals; desorption; dyes; fullerene; nitrogen; photocatalysis; photolysis; polyethylene glycol; rhodamines; scanning electron microscopy; surface area; thermogravimetry; water solubility
Abstract:
... Biomineralization is a typical methodology developed by nature to produce calcium-based materials. A method mimicking this process has nowadays become popular for the preparation of artificial organic–inorganic hybrids. Here, Cu₃(PO₄)₂ crystals with a flowerlike morphology have been prepared using water-soluble derivatives of fullerene C₆₀ as templates. In a typical system, flowerlike crystals of ...
DOI:
10.1021/acs.langmuir.9b00193

63. Functionalization of corn stover with 3-aminopropyltrietoxysilane to uptake Reactive Red 141 from aqueous solutions

Author:
Paola Mortari Carijo; Glaydson Simões dos Reis; Éder Cláudio Lima; Marcos L. S. Oliveira; Guilherme Luiz Dotto
Source:
Environmental science and pollution research international 2019 v.26 no.31 pp. 32198-32208
ISSN:
0944-1344
Subject:
adsorbents; adsorption; analytical methods; aqueous solutions; color; corn stover; dyes; effluents; endothermy; ions; pH; thermodynamics
Abstract:
... An alternative and low-cost adsorbent (CS–APTES) was developed by the functionalization corn stover (CS) with 3-aminopropyltrietoxysilane (APTES) using a simple method. Several analytical techniques were used to prove the functionalization and then, CS–APTES was employed to adsorb Reactive Red 141 (RR141) dye from aqueous solutions. The functionalization with APTES caused an increase of 15 times i ...
DOI:
10.1007/s11356-019-06386-2

64. Functionalized coconut husks for rhodamine-B dye sequestration

Author:
Olugbenga Solomon Bello; Kayode Adesina Adegoke; Samuel Oluwaseun Fagbenro; Olasunkanmi Seun Lameed
Source:
Applied water science 2019 v.9 no.8 pp. 189
ISSN:
2190-5487
Subject:
Fourier transform infrared spectroscopy; activated carbon; adsorbents; adsorption; aqueous solutions; coir; cost analysis; dyes; endothermy; energy-dispersive X-ray analysis; kinetics; models; scanning electron microscopy; sorption isotherms; temperature; thermodynamics; titration
Abstract:
... This study investigates the efficacy of acid activated coconut husk (CHA) for the removal of rhodamine-B (Rh-B) dye from aqueous solutions. The CHA prepared was characterized using various techniques: SEM, FTIR EDX, Boehm titration and pHₚzc, respectively. The effects of different operational parameters including initial concentration, contact time and solution temperatures were examined. Kinetic ...
DOI:
10.1007/s13201-019-1051-4

65. Functionalized locust bean pod (Parkia biglobosa) activated carbon for Rhodamine B dye removal

Author:
Olugbenga Solomon Bello; Kayode Adesina Adegoke; Oluwafunmilayo Oluwapamilerin Sarumi; Olasunkanmi Seun Lameed
Source:
Heliyon 2019 v.5 no.8 pp. e02323
ISSN:
2405-8440
Subject:
Parkia biglobosa; activated carbon; adsorbents; adsorption; aqueous solutions; cost analysis; dyes; energy; hulls; kinetics; locust beans; rhodamines; temperature; thermodynamics; titration
Abstract:
... Activated carbon prepared from locust bean husk was modified using ortho-phosphoric acid (ALBP) and used to scavenge Rhodamine B (RhB) dye from aqueous solutions. Characteristic features of the adsorbents were investigated using SEM, FTIR, pHₚzc and Boehm Titration (BT) techniques respectively. Batch studies were used to determine the influences of contact time, temperature and initial Rh–B dye co ...
DOI:
10.1016/j.heliyon.2019.e02323
PubMed:
31517094
PubMed Central:
PMC6728439

66. Green synthesis of f-CdWO4 for photocatalytic degradation and adsorptive removal of Bismarck Brown R dye from water

Author:
Bushra Fatima; Sharf Ilahi Siddiqui; Rabia Ahmed; Saif Ali Chaudhry
Source:
Water resources and industry 2019 v.22 pp. 100119
ISSN:
2212-3717
Subject:
Brassica rapa; adsorption; aqueous solutions; cadmium; dyes; endothermy; industry; iodides; irradiation; photocatalysis; semiconductors; sodium; temperature; thermodynamics; toxicity; water; water treatment
Abstract:
... Cadmium tungstate, CdWO₄, is well-known semiconducting material which exhibit good photocatalytic properties but its preparation is usually carried out at very high temperature. Hardly any report is available for its preparation through green route, and its application for water treatment. Therefore, the functionalized cadmium tungstate, f-CdWO₄, nanoparticles synthesis through green, environmenta ...
DOI:
10.1016/j.wri.2019.100119

67. Greener Terpene–Terpene Eutectic Mixtures as Hydrophobic Solvents

Author:
Mónia A. R. Martins; Liliana P. Silva; Nicolas Schaeffer; Dinis O. Abranches; Guilherme J. Maximo; Simão P. Pinho; João A. P. Coutinho
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.20 pp. 17414-17423
ISSN:
2168-0485
Subject:
ambient temperature; aqueous solutions; boiling; dyes; hydrophobicity; models; screening; solvents; terpenoids; viscosity; water solubility
Abstract:
... Natural products can be the basis for the development of green solvents, relevant for the advancement of new, more sustainable processes and products. In this work, 10 binary mixtures constituted by terpenes are prepared and characterized. Their solid–liquid phase diagrams show that room-temperature solvents can be prepared from solid terpenes in a wide composition range. These diagrams are accura ...
DOI:
10.1021/acssuschemeng.9b04614

68. H3PO4-activated carbons produced from açai stones and Brazil nut shells: removal of basic blue 26 dye from aqueous solutions by adsorption

Author:
Thielle Nayara Vieira de Souza; Melissa Gurgel Adeodato Vieira; Meuris Gurgel Carlos da Silva; Davi do Socorro Barros Brasil; Samira Maria Leão de Carvalho
Source:
Environmental science and pollution research international 2019 v.26 no.28 pp. 28533-28547
ISSN:
0944-1344
Subject:
Bertholletia excelsa; Brazil nuts; Euterpe oleracea; Fourier transform infrared spectroscopy; X-ray diffraction; acidity; adsorbents; adsorption; aqueous solutions; batch systems; data analysis; dyes; heat production; hulls; kinetics; models; nitrogen; porosimetry; sorption isotherms; temperature
Abstract:
... The adsorption characteristics of C.I. basic blue 26 (BB26) from aqueous solutions onto H₃PO₄-activated carbons (ACs) produced from açai stones (Euterpe oleracea Martius) and Brazil nut shells (Bertholletia excelsa H. B. K) were investigated in a batch system. The ACs were characterized by XRD, FT-IR, N₂ adsorption at 77 K, mercury porosimetry, and acidity/basicity analysis. The pseudo-first-order ...
DOI:
10.1007/s11356-019-04215-0

69. Highly Photostable and Two-Photon Active Quantum Dot–Polymer Multicolor Hybrid Coacervate Droplets

Author:
Jamuna K. Vaishnav; Tushar Kanti Mukherjee
Source:
Langmuir 2019 v.35 no.36 pp. 11764-11773
ISSN:
1520-5827
Subject:
albumins; aqueous solutions; bioimaging; blood serum; cadmium; catalytic activity; confocal laser scanning microscopy; droplets; dyes; electrostatic interactions; fluorescence microscopy; ionic strength; mixing; nanocomposites; pH; photoluminescence; polymers; quantum dots; quaternary ammonium compounds
Abstract:
... Fabrication and precise control of the physicochemical properties of multifunctional organic–inorganic hybrid nanocomposites find great importance in various research fields. Herein, we report the fabrication of a new class of luminescent hybrid coacervate droplets from CdTe quantum dots (QDs) and a poly(diallyldimethylammonium chloride) (PDADMAC) aqueous mixture. The colloidal stability of these ...
DOI:
10.1021/acs.langmuir.9b01783

70. Highly charged, magnetically sensitive magnetite/polystyrene colloids: synthesis and tunable optical properties

Author:
Xuegang Lu; Changhao Chen; Xiaoxiang Wen; Ping Han; Wenfeng Jiang; Gongying Liang
Source:
Journal of materials science 2019 v.54 no.10 pp. 7628-7636
ISSN:
0022-2461
Subject:
aqueous solutions; biosensors; colloids; color; dyes; magnetic fields; magnetite; nanoemulsions; optical properties; pigments; polymerization; polystyrenes
Abstract:
... Highly charged monodisperse magnetite/polystyrene colloidal particles are successfully synthesized by using a miniemulsion polymerization method. The particles, with high saturation magnetization (Mₛ ≈ 38.6 emu g⁻¹), display high sensitivity to the magnetic field and can self-assemble into periodically ordered colloidal structure in aqueous solution, thus diffract light strongly, under magnetic in ...
DOI:
10.1007/s10853-019-03445-4

71. Honeycomb-like hydrogel adsorbents derived from salecan polysaccharide for wastewater treatment

Author:
Xiaoliang Qi; Xianqin Tong; Ting Su; Lei Lin; Qianwen Gong
Source:
Cellulose 2019 v.26 no.16 pp. 8759-8773
ISSN:
0969-0239
Subject:
adsorbents; adsorption; aqueous solutions; biosorbents; cellulose; dyes; hydrogels; kinetics; models; pH; polymerization; remediation; rhodamines; sorption isotherms; sulfonates; wastewater; wastewater treatment; water purification
Abstract:
... There is an emerging quest for water purification materials with high efficiency and low cost, while still being renewable and sustainable. In this study, a series of honeycomb-like composite hydrogels based on salecan polysaccharide and poly(acrylamide-co-sodium allylsulfonate) were developed by solution polymerization and were employed as adsorbents for removal of rhodamine B (RhB) dye from aque ...
DOI:
10.1007/s10570-019-02680-x

72. Hybrid treatment of coagulation/flocculation process followed by ultrafiltration in TIO2-modified membranes to improve the removal of reactive black 5 dye

Author:
Natália de Camargo Lima Beluci; Gustavo Affonso Pisano Mateus; Carolina Sayury Miyashiro; Natália Cândido Homem; Raquel Guttierres Gomes; Márcia Regina Fagundes-Klen; Rosangela Bergamasco; Angélica Marquetotti Salcedo Vieira
Source:
Science of the total environment 2019 v.664 pp. 222-229
ISSN:
0048-9697
Subject:
Fourier transform infrared spectroscopy; Moringa oleifera; aqueous solutions; coagulation; color; dyes; flocculation; fouling; scanning electron microscopy; seeds; toxicity; ultrafiltration; wastewater
Abstract:
... Many efforts have been made to minimize the polluting effect of wastewater containing dyes that are potentially toxic to the environment. The association of the coagulation/flocculation (CF) process, using saline extract of Moringa oleifera Lam (MO) seeds and subsequently ultrafiltration (UF) in TiO₂-modified membranes was performed to remove reactive black 5 dye (10 ppm, RB5) from aqueous solutio ...
DOI:
10.1016/j.scitotenv.2019.01.199

73. Improved Photocatalytic Performance for Rhodamine B Degradation by Porous Zn2SnO4 Prepared with Carbon Black as a Pore-Forming Agent

Author:
Siara Silvestri; Roberta dos Santos Trentin; Julia da Silveira Salla; Edson Luiz Foletto
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 186
ISSN:
0049-6979
Subject:
X-ray diffraction; aqueous solutions; crystal structure; dyes; energy; nitrogen; photocatalysis; photocatalysts; photolysis; porosity; powders; reflectance; rhodamines; soot; surface area
Abstract:
... Hydrothermal synthesis followed by a calcination step was used to prepare porous Zn₂SnO₄ powders using carbon black as a pore-forming agent. The porous Zn₂SnO₄ was used as a photocatalyst to degrade the Rhodamine B dye from aqueous solution under UV artificial light. X-ray diffraction, N₂ adsorption-desorption isotherms, and UV-Vis diffuse reflectance were used to characterize the material. The ad ...
DOI:
10.1007/s11270-019-4239-1

74. In situ deposition of Ag/AgCl on the surface of magnetic metal-organic framework nanocomposite and its application for the visible-light photocatalytic degradation of Rhodamine dye

Author:
Niyaz Mohammad Mahmoodi; Ali Taghizadeh; Mohsen Taghizadeh; Jafar Abdi
Source:
Journal of hazardous materials 2019 v.378 pp. 120741
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorption; ambient temperature; aqueous solutions; coordination polymers; dyes; energy-dispersive X-ray analysis; hot water treatment; light; liquids; magnetic separation; magnetism; models; nanocomposites; nanoparticles; photocatalysis; photocatalysts; photolysis; photons; pollutants; recycling; rhodamines; scanning electron microscopy; silver; silver chloride; synergism; transmission electron microscopy
Abstract:
... Herein, NH2-MIL-125(Ti) (NMT) as one of the known stable metal-organic frameworks (MOFs) in aqueous solution was successfully magnetized with CoFe2O4 nanoparticles through the hydrothermal method. The Ag/AgCl as a plasmonic photocatalyst was assembled on the CoFe2O4/NMT (CFNMT) at room temperature by in situ deposition, and photo-reduction methods to improve the photocatalytic activity of CFNMT un ...
DOI:
10.1016/j.jhazmat.2019.06.018

75. Interlocked Graphene Oxide Provides Narrow Channels for Effective Water Desalination through Forward Osmosis

Author:
Nagarajan Padmavathy; Shasanka Sekhar Behera; Shabnam Pathan; Lopamudra Das Ghosh; Suryasarathi Bose
Source:
ACS applied materials & interfaces 2019 v.11 no.7 pp. 7566-7575
ISSN:
1944-8252
Subject:
aqueous solutions; bacterial growth; biofouling; crosslinking; cytotoxicity; desalination; dyes; graphene oxide; magnesium hydroxide; osmosis; permeability; quantum dots; remediation; sieving; solutes
Abstract:
... Unique two-dimensional water channels formed by stacked graphene oxide (GO) sheets that are “nonleachable” and nonswellable can show great potential for water remediation. The interlayer spacing controls the solute or ion sieving and plays a crucial role in water transport in GO-based membranes. Herein, the sub-nano-channels adjacent to the sheets are altered by either ionic or covalent cross-link ...
DOI:
10.1021/acsami.8b20598

76. LED-activated immobilized Fe-Ce-N tri-doped TiO2 nanocatalyst on glass bed for photocatalytic degradation organic dye from aqueous solutions

Author:
Layegh Khaledi Maki; Afshin Maleki; Reza Rezaee; Hiua Daraei; Kaan Yetilmezsoy
Source:
Environmental technology & innovation 2019 v.15 pp. 100411
ISSN:
2352-1864
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; aqueous solutions; atomic force microscopy; catalysts; cerium; dyes; environmental technology; glass; iron; light intensity; nanoparticles; nitrogen; oxidation; pH; photocatalysis; pollutants; scanning electron microscopy; sol-gel processing; solar radiation; titanium dioxide; zeta potential
Abstract:
... The aim of this study was to evaluate the photocatalytic process efficiency of titanium dioxide (TiO2) nanoparticles doped with nitrogen (N), iron (Fe), and cerium (Ce) stabilized on a glass bed for the removal of organic dye from an aqueous medium in the presence of visible light. Synthesis of nanocatalysts was performed by sol–gel method. SEM, XRD, FTIR, DLS, AFM, and Zeta-potential analyses wer ...
DOI:
10.1016/j.eti.2019.100411

77. Low Carbonate Contaminative and Ultrasmall NiAl LDH Prepared by Acid Salt Treatment with High Adsorption Capacity of Methyl Orange

Author:
Chuan Jing; Yuxiang Chen; Xing Zhang; Xiaolong Guo; Xiaoying Liu; Biqin Dong; Fan Dong; Xianming Zhang; Yunqi Liu; Shaochun Li; Yuxin Zhang
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.27 pp. 11985-11998
ISSN:
1520-5045
Subject:
adsorbents; adsorption; aqueous solutions; carbonates; chlorides; dyes; endothermy; hot water treatment; hydroxides; methyl orange; nanosheets; pH; process design
Abstract:
... Layered double hydroxides (LDHs) are attracting intense research interests as methyl orange (MO) adsorbent due to the unique anionic exchange ability. Herein, ultrasmall NiAl LDHs with Cl– intercalation were prepared by a facile method combining hydrothermal method with acid salt treatment. As a result, the as-prepared NiAl LDHs displayed favorable removal performance toward MO from aqueous soluti ...
DOI:
10.1021/acs.iecr.9b01706

78. Low – cost multilayered green fiber for the treatment of textile industry waste water

Author:
Mary Lidiya Mathew; Akhil Gopalakrishnan; Charuvila T. Aravindakumar; Usha K. Aravind
Source:
Journal of hazardous materials 2019 v.365 pp. 297-305
ISSN:
0304-3894
Subject:
adsorbents; aqueous solutions; chemical oxygen demand; chitosan; coir; color; dyes; electrolytes; fabrics; hydrophobicity; industrial wastes; industrial wastewater; pH; pollutants; polyacrylic acid; sodium chloride; sodium dodecyl sulfate; sodium sulfate; spectroscopy; textile industry; water treatment
Abstract:
... Layer by layer (LbL) assembly can be regarded as an emerging technology for the separation of organic micro-pollutants from water. Direct assembly of polyelectrolytes (PEs) under LbL mode on natural support material is rare. Here we report the integration of LbL to one of the most resourceful support materials that might have an enduring impact on water treatment in color industry. A low-cost adso ...
DOI:
10.1016/j.jhazmat.2018.11.014

79. Low-cost adsorbent prepared from poplar sawdust for removal of disperse orange 30 dye from aqueous solutions

Author:
U. Tezcan Un; F. Ates
Source:
International journal of environmental science and technology 2019 v.16 no.2 pp. 899-908
ISSN:
1735-1472
Subject:
Fourier transform infrared spectroscopy; Populus; adsorbents; adsorption; aqueous solutions; dyes; equations; fabrics; pH; pyrolysis; sawdust; scanning electron microscopy; temperature
Abstract:
... In this study, the applicability of char generated from poplar sawdust as an inexpensive adsorbent for the removal of a textile dye is investigated. Adsorbent samples were generated through pyrolysis at temperatures of 500, 600, 700 and 800 °C. The structural features of the char samples were illuminated by elemental analyses, FTIR, BET and SEM analyses. The effect of operating parameters such as ...
DOI:
10.1007/s13762-018-1716-9

80. Mechanism and kinetics of catalytic ozonation for elimination of organic compounds with spinel-type CuAl2O4 and its precursor

Author:
Yin Xu; Ziyan Lin; Yanyan Zheng; Jean-Philippe Dacquin; Sébastien Royer; Hui Zhang
Source:
Science of the total environment 2019 v.651 pp. 2585-2596
ISSN:
0048-9697
Subject:
Fourier transform infrared spectroscopy; Lewis acids; X-ray diffraction; X-ray photoelectron spectroscopy; acidity; active sites; aqueous solutions; catalysts; catalytic activity; dyes; electron transfer; energy-dispersive X-ray analysis; moieties; organic compounds; oxides; ozonation; ozone; pH; scanning electron microscopy; superoxide anion; temperature; texture; transmission electron microscopy
Abstract:
... CuAl2O4 based mixed oxides were used as heterogeneous catalysts for ozone activation to degrade organics in aqueous solution. The solids were thoroughly characterized by SEM/EDS, N2 physisorption, XRD, FTIR, Pyridine-FTIR, TEM and XPS. We demonstrated that the solid precursor calcined at 300 °C exhibited the best catalytic ozonation activity with respect to CuAl2O4 spinel phase obtained at higher ...
DOI:
10.1016/j.scitotenv.2018.10.005

81. Multifunctional Nanodroplets Encapsulating Naphthalocyanine and Perfluorohexane for Bimodal Image-Guided Therapy

Author:
Hyunsik Choi; Wonseok Choi; Jeesu Kim; Won Ho Kong; Ki Su Kim; Chulhong Kim; Sei Kwang Hahn
Source:
Biomacromolecules 2019 v.20 no.10 pp. 3767-3777
ISSN:
1526-4602
Subject:
apoptosis; aqueous solutions; biocompatibility; crosslinking; dyes; emulsions; encapsulation; image analysis; methylene chloride; nanocarriers; nanoparticles; necrosis; neoplasm cells; neoplasms; perfluorocarbons; polyethylene glycol; ultrasonics; ultrasonography; volatilization
Abstract:
... Although nanocarriers containing perfluorocarbon (PFC) have been widely investigated as an ultrasound (US) imaging agent and a high intensity focused ultrasound (HIFU) agent, these carriers have suffered from low stability and biocompatibility limiting their further biomedical applications. Here, we developed surface cross-linked polymer nanodroplets as a HIFU therapeutic agent guided by bimodal p ...
DOI:
10.1021/acs.biomac.9b00842

82. Multifunctional Thin-Film Nanofiltration Membrane Incorporated with Reduced Graphene Oxide@TiO₂@Ag Nanocomposites for High Desalination Performance, Dye Retention, and Antibacterial Properties

Author:
Hamidreza Abadikhah; Ehsan Naderi Kalali; Samaneh Khodi; Xin Xu; Simeon Agathopoulos
Source:
ACS applied materials & interfaces 2019 v.11 no.26 pp. 23535-23545
ISSN:
1944-8252
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; antibacterial properties; aqueous solutions; atomic force microscopy; bacteria; channelization; contact angle; cost effectiveness; desalination; dyes; energy-dispersive X-ray analysis; graphene; graphene oxide; hydrophilicity; irradiation; microwave radiation; microwave treatment; nanocomposites; nanofiltration; nanosilver; permeability; polyamides; polymerization; scanning electron microscopy; silicon nitride; silver; sodium sulfate; titanium dioxide; transmission electron microscopy; trimesoyl chloride
Abstract:
... High desalination performance, dye retention, and antibacterial properties were achieved with a multifunctional thin-film nanocomposite (MTFN) membrane, fabricated by the incorporation of a novel nanocomposite structure of reduced graphene oxide@TiO₂@Ag (rGO@TiO₂@Ag) into the polyamide active layer. The specific characteristics of the graphene-based nanocomposite, synthesized by the microwave-assi ...
DOI:
10.1021/acsami.9b03557

83. Multifunctional ZnO-porous carbon composites derived from MOF-74(Zn) with ultrafast pollutant adsorption capacity and supercapacitance properties

Author:
Linjie Wang; Penghao Tang; Jie Liu; Aobo Geng; Chi Song; Qiang Zhong; Lijie Xu; Lu Gan
Source:
Journal of colloid and interface science 2019 v.554 pp. 260-268
ISSN:
0021-9797
Subject:
absorbents; adsorption; aqueous solutions; capacitance; carbon; desorption; dyes; electrodes; pH; pollutants; pyrolysis; rhodamines; surface area; temperature
Abstract:
... In the present study, the ZnO-porous carbon (ZnO-C) composites were prepared by pyrolyzing MOF-74 (Zn) precursor at different pyrolysis temperatures. The ZnO-C composites were endowed with ultrafast organic dye adsorption capability and promising supercapacitance properties due to the existence of abundant pores within the composite structures. Having a surface area of 782.971 m2/g and pore volume ...
DOI:
10.1016/j.jcis.2019.07.015

84. Multifunctional vesicular coacervates as engineered supramolecular solvents for wastewater treatment

Author:
Ana Ballesteros-Gómez; Noelia Caballero-Casero; Sergio García-Fonseca; Loreto Lunar; Soledad Rubio
Source:
Chemosphere 2019 v.223 pp. 569-576
ISSN:
0045-6535
Subject:
ambient temperature; aqueous solutions; benzo(a)pyrene; carboxylic acids; droplets; dyes; hydrophobicity; ionic strength; ions; mixing; nanomaterials; pH; polycyclic aromatic hydrocarbons; quaternary ammonium compounds; solvents; tap water; textile mill effluents; wastewater; wastewater treatment
Abstract:
... In this study, multifunctional supramolecular solvents (SUPRASs) able to simultaneously extract ionic, polar and hydrophobic organic compounds from wastewater have been developed. SUPRASs were synthesized in aqueous solutions containing mixtures of carboxylic acids and carboxylates that underwent spontaneous self-assembly and coacervation under the addition of tetraalkylammonium ions. These SUPRAS ...
DOI:
10.1016/j.chemosphere.2019.02.089

85. Nano Silver-Iron-Reduced Graphene Oxide Modified Titanium Dioxide Photocatalytic Remediation System for Organic Dye

Author:
Danielle Thandi Sass; Emile Salomon Massima Mouele; Natasha Ross
Source:
Environments 2019 v.6 no.9 pp. -
ISSN:
2076-3298
Subject:
aqueous solutions; cost effectiveness; dyes; graphene; graphene oxide; irradiation; methyl orange; moieties; organic matter; photocatalysis; photocatalysts; remediation; spectroscopy; surface area; titanium dioxide
Abstract:
... The organic water contaminant, methyl orange contaminant (M.O), has shown a hazardous increase in our water systems over the past few years due to its increasing demand in industrial processes. The photocatalytic degradation of the commercial dye was studied through the application of modified TiO2 composite catalysts in aqueous solution under artificial irradiation. The improvement of ...
DOI:
10.3390/environments6090106

86. Nanomolar detection of adenosine triphosphate (ATP) using a nanostructured fluorescent chemosensing ensemble

Author:
Ling-Xi Huang; Qing Guo; Yong Chen; Peter Verwilst; Subin Son; Jia-Bin Wu; Qian-Yong Cao; Jong Seung Kim
Source:
Chemical communications 2019 v.55 no.94 pp. 14135-14138
ISSN:
1364-548X
Subject:
adenosine triphosphate; aqueous solutions; chemical compounds; chemical reactions; detection limit; dyes; fluorescence
Abstract:
... We report a novel nanostructured chemosensing ensemble PyNp-C13/UD, obtained by self-assembling uranine dye (UD) and an amphiphilic pyridinium salt PyNp-C13. The ensemble was developed for the fluorescence turn-on sensing of ATP in aqueous solutions and inside living cells. The assembly operates via an indicator displacement assay (IDA) method with an ultra-low detection limit of 6.8 nM. ...
DOI:
10.1039/c9cc08054f

87. Natural Sawdust as Adsorbent for the Eriochrome Black T Dye Removal from Aqueous Solution

Author:
Siham Akhouairi; Hassan Ouachtak; Abdelaziz Ait Addi; Amane Jada; Jamaa Douch
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 181
ISSN:
0049-6979
Subject:
adsorbents; adsorption; aqueous solutions; dyes; electrostatic interactions; equations; industrial wastes; pH; prediction; sawdust; sorption isotherms; wood industry
Abstract:
... This paper deals with the adsorption of an anionic dye, Eriochrome Black T (EBT), from aqueous solutions onto sawdust, which is a natural, eco-friendly, widespread, and a low-cost bio sorbent. The aim of the work is to append values to the wood industry waste. Thus, sawdust was used as adsorbent in both batch reactor (BR) and fixed bed column (FBC), and various operating parameters influencing the ...
DOI:
10.1007/s11270-019-4234-6

88. Novel acid treated biomass: Applications in Cu2+ scavenging, Rhodamine B/Cu2+ binary solution and real textile effluent treatment

Author:
Adejumoke Abosede Inyinbor; Folahan Amoo Adekola; Oluwasogo Adewumi Dada; Abimbola Peter Oluyori; Gabriel Ademola Olatunji; Oluwapamilerin Feyikemi Fanawopo; Toyin Adedayo Oreofe; Temitope Olabisi Abodunrin
Source:
Environmental technology & innovation 2019 v.13 pp. 37-47
ISSN:
2352-1864
Subject:
Irvingia gabonensis; adsorbents; adsorption; aqueous solutions; biomass; copper; dyes; environmental technology; pH; rhodamines; synergism; temperature; textile mill effluents; thermodynamics
Abstract:
... A novel adsorbent prepared from the waste of Irvingia gabonensis nut (ADN) was used for scavenging of Cu2+ from aqueous solution. Various adsorption operational parameters were investigated in order to establish the behavior of ADN before further studies. The efficacy of ADN in concurrent removal of rhodamine B (RhB) dye and Cu2+ in a binary solution of RhB/Cu2+ was also investigated. Finally the ...
DOI:
10.1016/j.eti.2018.10.006

89. One-pot preparation of zwitterion-type lignin polymers

Author:
Yanzhu Guo; Weijue Gao; Fangong Kong; Pedram Fatehi
Source:
International journal of biological macromolecules 2019 v.140 pp. 429-440
ISSN:
0141-8130
Subject:
aqueous solutions; biodegradability; carbon; dyes; flocculants; flocculation; hydrogen; lignin; moieties; pigments; quaternary ammonium compounds; sodium hydroxide; stable isotopes; sulfonates; thermal stability; wastewater
Abstract:
... In this work, a simple approach was examined to prepare zwitterion-type lignin (ZL) in a one-pot reaction system. Kraft lignin (KL) was modified with 3-chloro-2-hydroxypropansulfonic acid sodium salt (CHPSS) and glycidyltrimethylammonium chloride (GTMAC) in an aqueous solution simultaneously. The maximum amounts of sulfonate (1.57 mmol/g) and quaternary-N (2.16 mmol/g) groups on ZL were achieved u ...
DOI:
10.1016/j.ijbiomac.2019.08.135

90. Optimization of the 3D electro‐Fenton process in removal of acid orange 10 from aqueous solutions by response surface methodology

Author:
Hamed Mohammadi; Abdolazim Alinejad; Mahsa Khajeh; Mohammad Darvishmotevalli; Maryam Moradnia; Ashraf Mazaheri Tehrani; Gholamreza Hosseindost; Mohammad Reza Zare; Nezamaddin Mengelizadeh
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.10 pp. 3158-3171
ISSN:
0268-2575
Subject:
analysis of variance; aqueous solutions; dyes; electrochemistry; electrodes; energy; foams; industrialization; models; nickel; pH; population growth; response surface methodology; toxic substances; water resources
Abstract:
... BACKGROUND: In recent decades, rapid population growth and industrial development have led to the release of toxic compounds into water resources. Several technologies have been proposed to address the problem, and among them, the 3D electro‐Fenton process has found great popularity due to its high efficiency and simple operation. In the 3D electro‐Fenton process, the type of particle electrode is ...
DOI:
10.1002/jctb.6122

91. Photocatalytic Degradation Dynamics of Methyl Orange Using Coprecipitation Synthesized Fe3O4 Nanoparticles

Author:
Yousef Al-Abdallat; Inshad Jum’h; Abeer Al Bsoul; Rami Jumah; Ahmad Telfah
Source:
Water, air, and soil pollution 2019 v.230 no.12 pp. 277
ISSN:
0049-6979
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorbance; absorption; aqueous solutions; coprecipitation; crystallites; decolorization; dissociation; dyes; electrical conductivity; equations; hydrogen bonding; hydrophilic interactions; hydrophobicity; iron oxides; magnetism; methyl orange; models; nanoparticles; photocatalysis; pollutants; scanning electron microscopy; solvents; statistical analysis; textile industry; wastewater; wavelengths
Abstract:
... This study aims to investigate the photocatalytic degradation performance, mechanism, and dynamics of methyl orange (MO) which is a widely used organic dye in textile industries as well a hazardous wastewater pollutant. The degradation process was catalyzed by employing a synthesized Fe₃O₄ magnetic nanoparticle (NP) using the coprecipitation method. The structural and morphological properties of t ...
DOI:
10.1007/s11270-019-4310-y

92. Photoinduced Deadhesion of a Polymer Film Using a Photochromic Donor–Acceptor Stenhouse Adduct

Author:
Seyed Hossein Mostafavi; Wangxiang Li; Kyle D. Clark; Friedrich Stricker; Javier Read de Alaniz; Christopher J. Bardeen
Source:
Macromolecules 2019 v.52 no.16 pp. 6311-6317
ISSN:
1520-5835
Subject:
adhesion; aqueous solutions; contact angle; delamination; dyes; films (materials); glass; irradiation; light; photoisomerization; polystyrenes
Abstract:
... Photoisomerization of molecules dissolved in a polymer film can modulate its properties. In a previous paper (Mostafavi, S. H.;Macromolecules2018, 51, 2388−2394), it was found that the ultraviolet light-induced photoisomerization of spiropyran dopants could substantially increase adhesion to a glass surface. In this work, a different photochromic reaction, the visible-light-induced cyclization of ...
DOI:
10.1021/acs.macromol.9b00882

93. Photon Upconversion in Aqueous Nanodroplets

Author:
Samuel N. Sanders; Mahesh K. Gangishetty; Matthew Y. Sfeir; Daniel N. Congreve
Source:
Journal of the American Chemical Society 2019 v.141 no.23 pp. 9180-9184
ISSN:
1520-5126
Subject:
aqueous solutions; boiling point; color; composite polymers; dyes; image analysis; micelles; nanoparticles; optogenetics; photochemistry; photochemotherapy; photons; solar energy; solvents
Abstract:
... Triplet fusion upconversion, the conversion of two low-energy photons into one higher-energy photon via excitonic intermediates, has the potential to revolutionize fields as diverse as biological imaging, photovoltaics, and optogenetics. However, important hurdles to widespread application still exist; for example, the vast majority of demonstrations are in nonpolar solvents, limiting applications ...
DOI:
10.1021/jacs.9b03992

94. Photostable Iridium(III)–Cyanine Complex Nanoparticles for Photoacoustic Imaging Guided Near-Infrared Photodynamic Therapy in Vivo

Author:
Qi Yang; Hongyu Jin; Yucong Gao; Jiaomin Lin; Hong Yang; Shiping Yang
Source:
ACS applied materials & interfaces 2019 v.11 no.17 pp. 15417-15425
ISSN:
1944-8252
Subject:
absorption; aqueous solutions; biochemical pathways; bladder; blood circulation; dyes; half life; image analysis; iridium; irradiation; kidneys; liver; mice; models; nanoparticles; near-infrared spectroscopy; neoplasms; permeability; pharmacokinetics; photochemotherapy; photostability; singlet oxygen; solvents; spleen; urine; water solubility
Abstract:
... The iridium(III)–cyanine complex (IrCy) was fabricated by conjugating an iridium(III) complex to a cyanine dye with an intense near-infrared (NIR) absorption. IrCy complex nanoparticles (NPs) with high water solubility and photostability were prepared by a solvent evaporation-induced self-assembly strategy. Considering their effective photacoustic (PA) imaging and generation of ¹O₂ property with 8 ...
DOI:
10.1021/acsami.9b04098

95. Phytoextraction capability of Azolla pinnata in the removal of rhodamine B from aqueous solution: artificial neural network and random forests approaches

Author:
Muhammad Raziq Rahimi Kooh; Muhammad Khairud Dahri; Linda B. L. Lim; Lee Hoon Lim; Sze Ling Lee
Source:
Applied water science 2019 v.9 no.4 pp. 80
ISSN:
2190-5487
Subject:
Azolla pinnata; algorithms; aqueous solutions; artificial intelligence; dyes; neural networks; pH; phytoaccumulation; plant pigments; rhodamines
Abstract:
... This study used live Azolla pinnata (AP) to remediate rhodamine B (RB) from aqueous solutions via the phytoextraction method, and machine learning algorithms such as artificial neural networks and random forests were used as predictive models. The pH was found to have a major influence on the phytoextraction process, and the AP dosage can change the pH of the aqueous solution. The optimum conditio ...
DOI:
10.1007/s13201-019-0960-6

96. Porous carbon material derived from fungal hyphae and its application for the removal of dye

Author:
Siji Chen; Zhixiao Wang; Yuhan Xia; Bolun Zhang; Huan Chen; Guang Chen; Shanshan Tang
Source:
RSC advances 2019 v.9 no.44 pp. 25480-25487
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; Irpex lacteus; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; aqueous solutions; carbon; desorption; dyeing; dyes; fungi; hyphae; models; moieties; nitrogen; oxygen; pH; pollution control; rhodamines; scanning electron microscopy; sorption isotherms; surface area; wastewater; water pollution
Abstract:
... In this work, fungal hyphae (FH, Irpex lacteus) was used as the carbon resource for the preparation of porous carbon materials (PCFH) using mixed alkali as the activator. The SEM, N₂ adsorption/desorption, FT-IR, XRD, Raman, and XPS were used to characterize the structure and surface properties of PCFH. The results showed that the PCFH not only has a huge Brunauer–Emmett–Teller (BET) surface area ...
DOI:
10.1039/c9ra04648h

97. Post-Coagulation Sludge as an Adsorbent of Dyes from Aqueous Solutions

Author:
Barbara Pieczykolan; Izabela Płonka
Source:
Ecological Chemistry and Engineering 2019 v.26 no.3 pp. 509-520
ISSN:
2084-4549
Subject:
adsorbents; adsorption; aqueous solutions; coagulation; dyes; energy; filtration; models; pH; sewage sludge; sorption isotherms; surface water; water supply; water treatment; Poland
Abstract:
... The main source of usable water supply in Poland is surface water. The most frequently used methods of surface water treatment are coagulation and filtration processes. During these processes post-coagulation sludge is generated, which is the main waste produced in water treatment plants. This sludge is characterized by an amorphous structure with a strongly developed specific surface, similar to ...
DOI:
10.1515/eces-2019-0038

98. Potential utility of graphene-based nano spinel ferrites as adsorbent and photocatalyst for removing organic/inorganic contaminants from aqueous solutions: A mini review

Author:
Chang Min Park; Young Mo Kim; Ki-Hyun Kim; Dengjun Wang; Chunming Su; Yeomin Yoon
Source:
Chemosphere 2019 v.221 pp. 392-402
ISSN:
0045-6535
Subject:
adsorbents; antibiotics; aquatic environment; aqueous solutions; cost effectiveness; decontamination; dyes; graphene; heavy metals; magnetic separation; magnetism; metal ions; nanomaterials; persistent organic pollutants; photocatalysis; photocatalysts; physicochemical properties; surface area; toxic substances
Abstract:
... Toxic substances such as heavy metals or persistent organic pollutants raise global environmental concerns. Thus, diverse water decontamination approaches using nano-adsorbents and/or photocatalysts based on nanotechnology are being developed. Particularly, many studies have examined the removal of organic and inorganic contaminants with novel graphene-based nano spinel ferrites (GNSFs) as potenti ...
DOI:
10.1016/j.chemosphere.2019.01.063

99. Potentiality of Eichhornia shoots ash towards removal of Congo red from aqueous solution: Isotherms, kinetics, thermodynamics and optimization studies

Author:
Tapas Kumar Roy; Naba Kumar Mondal
Source:
Groundwater for sustainable development 2019 v.9 pp. 100269
ISSN:
2352-801X
Subject:
Eichhornia crassipes; adsorption; aqueous solutions; biomass; dyes; entropy; groundwater; models; pH; response surface methodology; shoots; sustainable development; wastewater
Abstract:
... This study investigated the affinity of adsorption of Congo red (CR) dye on burned shoot of Eichhornia crassipes (BSEC) biomass and the effects of this dye on BSEC. The removal of CR from aqueous solution was conducted by a series of batch experiments and the optimum conditions were screen out through optimization study. The experimental data were nicely fitted with quadratic model for central com ...
DOI:
10.1016/j.gsd.2019.100269

100. Preparation and characterization of chitosan extracted from shrimp shells waste and chitosan film: application for Eriochrome black T removal from aqueous solutions

Author:
Nacer Boudouaia; Zohra Bengharez; Salah Jellali
Source:
Applied water science 2019 v.9 no.4 pp. 91
ISSN:
2190-5487
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; chitosan; differential scanning calorimetry; dyes; endothermy; molecular weight; pH; seafood waste; shrimp shells; sorption isotherms; temperature; thermodynamics; viscosity
Abstract:
... In this paper, chitosan (CS) was successfully extracted from shrimp shells waste at two deacetylation temperatures (90 °C and 40 °C). The obtained chitosan at 90 °C showed better physicochemical properties compared to the one prepared at 40 °C with a degree of deacetylation DA = 88%, molecular weight M = 353 KDa, viscosity η = 0.469 dL/g and pKa = 6.49, and its structure was confirmed by Fourier t ...
DOI:
10.1007/s13201-019-0967-z