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You searched for: Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Subject term adsorbents Remove constraint Subject term: adsorbents Subject term arsenic Remove constraint Subject term: arsenic
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1. A Mechanistic Approach for the Synthesis of Carboxylate-Rich Carbonaceous Biomass-Doped Lanthanum-Oxalate Nanocomplex for Arsenate Adsorption

Author:
Subbaiah Muthu Prabhu; Chitiphon Chuaicham; Keiko Sasaki
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.5 pp. 6052-6063
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; ambient temperature; arsenates; arsenic; biomass; carbon; coprecipitation; electrostatic interactions; equations; hydrogen bonding; lanthanum; ligands; oxalates; pH; protocols; sucrose; waste disposal
Abstract:
... Considering the protocol of “zero-alkaline waste disposal” for green and arsenic-free environment, lanthanum (La³⁺)-based MOF-like complex materials were designed, and the complex materials have been employed as adsorbent for AsO₄³– adsorption from water. The sucrose-derived porous carbon (SPC)@La-oxalate complex was prepared by a simple one-pot coprecipitation method at room temperature, where ox ...
DOI:
10.1021/acssuschemeng.7b04678

2. A critical review on arsenic removal from water using iron-based adsorbents

Author:
Linlin Hao; Mengzhu Liu; Nannan Wang; Guiju Li
Source:
RSC advances 2018 v.8 no.69 pp. 39545-39560
ISSN:
2046-2069
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; activated carbon; adsorbents; adsorption; arsenic; biomass; cellulose; drinking water; hydroxides; iron; mass transfer; mathematical models; minerals; nanoparticles; oxides; polymers; soil; thermodynamics
Abstract:
... Intensive research efforts have been pursued to remove arsenic (As) contamination from water with an intention to provide potable water to millions of people living in different countries. Recent studies have revealed that iron-based adsorbents, which are non-toxic, low cost, and easily accessible in large quantities, offer promising results for arsenic removal from water. This review is focused o ...
DOI:
10.1039/c8ra08512a

3. Adsorption combined with superconducting high gradient magnetic separation technique used for removal of arsenic and antimony

Author:
Zenglu Qi; Tista Prasai Joshi; Ruiping Liu; Yiran Li; Huijuan Liu; Jiuhui Qu
Source:
Journal of hazardous materials 2018 v.343 pp. 36-48
ISSN:
0304-3894
Subject:
United States Environmental Protection Agency; adsorbents; adsorption; antimony; arsenic; drinking water; finite element analysis; iron oxides; magnetic fields; magnetic separation; manganese; models; steel wool
Abstract:
... Manganese iron oxide (MnFe₂O₄), an excellent arsenic(As)/antimony(Sb) removal adsorbent, is greatly restricted for the solid-liquid separation. Through the application of superconducting high gradient magnetic separation (HGMS) technique, we herein constructed a facility for the in situ solid-liquid separation of micro-sized MnFe₂O₄ adsorbent in As/Sb removal process. To the relative low initial c ...
DOI:
10.1016/j.jhazmat.2017.09.007

4. Adsorption of As (III) and As (V) from aqueous solution by modified Cassia fistula (golden shower) biochar

Author:
Md. Arsh Alam; Wasim Akram Shaikh; Md. Osaid Alam; Tanushree Bhattacharya; Sukalyan Chakraborty; Bibhutibhushan Show; Indranil Saha
Source:
Applied water science 2018 v.8 no.7 pp. 198
ISSN:
2190-5487
Subject:
Cassia fistula; Fourier transform infrared spectroscopy; adsorbents; adsorption; ambient temperature; aqueous solutions; arsenates; arsenic; arsenites; biochar; biomass; biosorbents; biosorption; calcium; energy-dispersive X-ray analysis; ions; iron; leaching; mixing; models; pH; phosphates; scanning electron microscopy; sorption isotherms; thermodynamics
Abstract:
... The biosorption of two Arsenic (As) species [As (III) and As (V)] from aqueous solution onto activated biochar derived from Cassia fistula, belonging to Fabaceae family was studied. SEM/EDX characterization of the adsorbent showed an irregular, porous, and heterogeneous surface morphology with calcium and iron available for As binding. FTIR also showed the presence of groups responsible for As ads ...
DOI:
10.1007/s13201-018-0839-y

5. Adsorption/desorption of arsenite and arsenate on chitosan and nanochitosan

Author:
Katrina C. M. Kwok; Len Foong Koong; Tareq Al Ansari; Gordon McKay
Source:
Environmental science and pollution research international 2018 v.25 no.15 pp. 14734-14742
ISSN:
0944-1344
Subject:
adsorbents; adsorption; arsenates; arsenic; arsenites; biosorbents; chitosan; desorption; ions; pH; physical properties
Abstract:
... Equilibrium sorption studies of anionic species of arsenite, As(III) ions and arsenate As(V) ions onto two biosorbents, namely, chitosan and nanochitosan, have been investigated and compared. The results and trends in the sorption behavior are novel, and we have observed during the sorption process of the As(III) and As(V) on chitosan, a slow process of desorption occurred after an initial maximum ...
DOI:
10.1007/s11356-018-1501-9

6. Adsorptive removal of arsenic by novel iron/olivine composite: Insights into preparation and adsorption process by response surface methodology and artificial neural network

Author:
Partha S. Ghosal; Krishna V. Kattil; Manoj K. Yadav; Ashok K. Gupta
Source:
Journal of environmental management 2018 v.209 pp. 176-187
ISSN:
0301-4797
Subject:
adsorbents; adsorption; arsenates; arsenic; arsenites; iron; neural networks; response surface methodology; sorption isotherms; surface area; temperature
Abstract:
... Olivine, a low-cost natural material, impregnated with iron is introduced in the adsorptive removal of arsenic. A wet impregnation method and subsequent calcination were employed for the preparation of iron/olivine composite. The major preparation process parameter, viz., iron loading and calcination temperature were optimized through the response surface methodology coupled with a factorial desig ...
DOI:
10.1016/j.jenvman.2017.12.040

7. Adsorptive removal of lead and arsenic from aqueous solution using soya bean as a novel biosorbent: equilibrium isotherm and thermal stability studies

Author:
Nisha Gaur; Aayush Kukreja; Mahavir Yadav; Archana Tiwari
Source:
Applied water science 2018 v.8 no.4 pp. 98
ISSN:
2190-5487
Subject:
absorbents; adsorbents; adsorption; aqueous solutions; arsenic; biosorbents; biosorption; heat production; heavy metals; lead; models; pH; sorption isotherms; soybeans; temperature; thermal degradation; thermal stability; wastewater
Abstract:
... In this study, adsorption potential of soya bean adsorbent for lead (Pb) and arsenic (As) has been assessed in order to consider its suitability for purification of wastewater containing heavy metals. The main focus of study was on Pb and As. Batch experiments were performed to study the adsorption of Pb and As on soya bean absorbent. The effect of various experimental parameters (adsorbent dose, ...
DOI:
10.1007/s13201-018-0743-5

8. Aero-Gel Based Cerium Doped Iron Oxide Solid Solution for Ultrafast Removal of Arsenic

Author:
Prashant Kumar Mishra; Parveen Gahlyan; Rakesh Kumar; Pramod Kumar Rai
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.8 pp. 10668-10678
ISSN:
2168-0485
Subject:
adsorbents; adsorption; ambient temperature; arsenic; ceric oxide; cerium; iron; iron oxides; magnetism; metal ions; nanoparticles; oxidation; oxygen; pH; reflectance spectroscopy; scanning electron microscopy; toxicity; transmission electron microscopy; ultrasonics
Abstract:
... A solid solution of aero-gel based cerium doped iron oxide nanoparticles has been utilized for the first time for ultrasonic wave assisted adsorptive removal of arsenic from aqueous medium. The FE-SEM and HR-TEM images revealed a novel morphology of hollow architectures with irregular distribution in sizes in which the particles are interconnected with each other in a long-range network. The HR-XR ...
DOI:
10.1021/acssuschemeng.8b02006

9. Application of Adsorbate Solid Solution Theory To Design Novel Adsorbents for Arsenic Removal Using CAMD

Author:
Rajat K. Doshi; Rajib Mukherjee; Urmila M. Diwekar
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.2 pp. 2603-2611
ISSN:
2168-0485
Subject:
adsorbents; adsorption; algorithms; arsenic; clay; groundwater; ion exchange; markets; microfiltration; oxidation; remediation; sepiolite; smectite; system optimization; thermodynamics; zeolites
Abstract:
... Arsenic is a carcinogenic contaminant that pollutes the groundwater, a consequence of poor arsenic disposal. Various techniques are used to remove arsenic, such as oxidation, coagulation–flocculation, membrane filtration, ion exchange, and adsorption, among which adsorption is the most efficient method. Current arsenic separating agents on the market have a limited adsorption capacity. The overall ...
DOI:
10.1021/acssuschemeng.7b04094

10. Arsenate and arsenite adsorption onto iron-coated cork granulates

Author:
Ariana M.A. Pintor; Bárbara R.C. Vieira; Sílvia C.R. Santos; Rui A.R. Boaventura; Cidália M.S. Botelho
Source:
Science of the total environment 2018 v.642 pp. 1075-1089
ISSN:
0048-9697
Subject:
X-ray photoelectron spectroscopy; adsorbents; adsorption; arsenates; arsenic; arsenites; coatings; cork; ferric chloride; humans; hydroxides; iron; leaching; models; oxidation; pH; remediation; rural areas; sorption isotherms; temperature
Abstract:
... There is a growing demand for low-cost, effective adsorbents for arsenic removal from water intended for human consumption in affected rural areas. This work presents a novel adsorbent based on the coating of cork granulates with iron (oxy)hydroxides for the removal of As(III) and As(V) from aqueous matrices.A 2⁶–³ fractional factorial design was used to determine the optimal conditions for the ir ...
DOI:
10.1016/j.scitotenv.2018.06.170

11. Arsenic removal from water and river water by the combined adsorption - UF membrane process

Author:
Linlin Hao; Nannan Wang; Chang Wang; Guiju Li
Source:
Chemosphere 2018 v.202 pp. 768-776
ISSN:
0045-6535
Subject:
adsorbents; adsorption; aeration; arsenic; cellulose; electrostatic interactions; fouling; heat production; pH; response surface methodology; river water; sodium chloride; sodium hydroxide; sorption isotherms; ultrafiltration
Abstract:
... In this study, a pilot-scale adsorption-UF process equipped with an aerated system is established for arsenic removal from As-spiked Songhua river water. A newly synthesized amino-functionalized coffee cellulose adsorbent (PEI-coffee) which is derived from spent coffee powder is fully characterized and used for arsenic removal from water. The batch experiments revealed that the adsorption process ...
DOI:
10.1016/j.chemosphere.2018.03.159

12. Arsenic removal from water by metal-organic framework MIL-88A microrods

Author:
Hao Wu; Meng-Dan Ma; Wei-Zhuo Gai; Hongxun Yang; Jian-Ge Zhou; Zhenxiang Cheng; Pingguang Xu; Zhen-Yan Deng
Source:
Environmental science and pollution research international 2018 v.25 no.27 pp. 27196-27202
ISSN:
0944-1344
Subject:
adsorbents; adsorption; arsenic; coordination compounds; hot water treatment; kinetics; microstructure; models; sorption isotherms
Abstract:
... Fe-based metal-organic framework MIL-88A microrods were synthesized by hydrothermal method, which were used to adsorb As(V) in water for the first time. The experimental results indicated that MIL-88A has a very fast adsorption rate towards arsenic in water. The kinetic and isothermal data for arsenic removal were better fitted to the pseudo-second-order kinetic model and Langmuir model, respectiv ...
DOI:
10.1007/s11356-018-2751-2

13. Arsenic removal from water/wastewater using layered double hydroxide derived adsorbents, a critical review

Author:
Junya Wang; Taiping Zhang; Min Li; Ying Yang; Peng Lu; Ping Ning; Qiang Wang
Source:
RSC advances 2018 v.8 no.40 pp. 22694-22709
ISSN:
2046-2069
Subject:
adsorbents; adsorption; aluminum; anions; arsenic; hydrophilicity; hydroxides; magnesium; particle size; pollution; wastewater
Abstract:
... Arsenic pollution has become a worldwide environmental concern. Dangerous arsenic concentrations in natural waters threaten the health of millions of people, and this has received significant attention. Among the various technologies that have been developed for arsenic removal from water, the use of adsorption technology is considered to be a prevailing method, because the adsorption approach usu ...
DOI:
10.1039/c8ra03647k

14. As(III) and As(V) adsorption on nanocomposite of hydrated zirconium oxide coated carbon nanotubes

Author:
Dengchao Liu; Shubo Deng; Ayiguli Maimaiti; Bin Wang; Jun Huang; Yujue Wang; Gang Yu
Source:
Journal of colloid and interface science 2018 v.511 pp. 277-284
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; arsenic; carbon nanotubes; drinking water; hydrolysis; nanocomposites; nanoparticles; pH; scanning electron microscopes; scanning electron microscopy; transmission electron microscopes; transmission electron microscopy; zirconium oxide
Abstract:
... Novel hydrated zirconium oxide (ZrO(OH)2) coated carbon nanotubes (CNTs) were prepared via a filtration-steam hydrolysis method, and were used to remove As(III) and As(V) from drinking water. This adsorbent was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The ZrO(OH)2 coated ...
DOI:
10.1016/j.jcis.2017.10.004

15. As(V) Removal from Water Using a Novel Magnetic Particle Adsorbent Prepared with Iron-Containing Water Treatment Residuals

Author:
Huiping Zeng; Can Yin; Tongda Qiao; Yaping Yu; Jie Zhang; Dong Li
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.11 pp. 14734-14742
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; arsenic; bicarbonates; chlorides; ferric oxide; laboratory experimentation; magnetic materials; magnetic properties; magnetism; models; pH; phosphates; porous media; scanning electron microscopy; sludge; sorption isotherms; sulfates; surface area; water treatment
Abstract:
... Magnetic particle adsorbent (MPA) was prepared using iron-containing sludge by solvothermal process for As(V) removal from the water solution. The magnetic property, structure features, and surface morphology of MPA were characterized by a vibrating-sample magnetometer, X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, and Brunauner–Emmett–Teller analysis. Laborato ...
DOI:
10.1021/acssuschemeng.8b03270

16. As(V) removal from aqueous solution using a low-cost adsorbent coir pith ash: Equilibrium and kinetic study

Author:
Md Mezbaul Bahar; Khandaker Rayhan Mahbub; Ravi Naidu; Mallavarapu Megharaj
Source:
Environmental technology & innovation 2018 v.9 pp. 198-209
ISSN:
2352-1864
Subject:
Gibbs free energy; adsorbents; adsorption; ambient temperature; aqueous solutions; arsenic; batch systems; coir; environmental technology; ion exchange; kinetics; models; pH; pith; sorption isotherms; water pollution
Abstract:
... In this study, the adsorptive removal of As(V) from aqueous solution by using a low-cost adsorbent coir pith ash (CPA) was analysed in a batch system. The adsorption capacity of CPA was investigated under different process parameters, these being pH, adsorbent dose, initial As(V) concentration and contact time. The CPA was found to adsorb As(V) over the initial solution pH range of 2–12, and the b ...
DOI:
10.1016/j.eti.2017.12.005

17. Biochar from Different Carbonaceous Waste Materials: Ecotoxicity and Effectiveness in the Sorption of Metal(loid)s

Author:
Mariano Simón; Inés García; María Diez-Ortiz; Verónica González
Source:
Water, air, and soil pollution 2018 v.229 no.7 pp. 224
ISSN:
0049-6979
Subject:
adsorbents; adsorption; arsenates; arsenic; biochar; copper; ecotoxicology; ions; iron; lead; moieties; organic matter; pH; phosphates; pollutants; pyrolysis; sewage sludge; soil; soil invertebrates; wood; zinc
Abstract:
... In this study, biochar produced by pyrolysis of urban pruning wood (Bpw) and sewage sludge (Bss) were characterized and investigated as adsorbents for the removal of Cu(II), Pb(II), Zn(II), and As(V) from contaminated solutions. Both types of biochars showed different physical-chemical properties and metal(loid) content. In Bss, Cu, Zn, and Pb concentrations exceeded the upper limit of the common ...
DOI:
10.1007/s11270-018-3860-8

18. Cerium dioxide and composites for the removal of toxic metal ions

Author:
Sharon Olivera; K. Chaitra; Krishna Venkatesh; Handanahally Basavarajaiah Muralidhara; Inamuddin; Abdullah M. Asiri; Mohd Imran Ahamed
Source:
Environmental chemistry letters 2018 v.16 no.4 pp. 1233-1246
ISSN:
1610-3653
Subject:
adsorbents; adsorption; arsenic; cadmium; catalytic activity; ceric oxide; cerium; chromium; cost effectiveness; decontamination; drinking water; fluorides; human health; kinetics; lead; mercury; metal ions; moieties; porosity; semiconductors; sorption isotherms; surface area; toxicity; water pollution; water treatment
Abstract:
... The presence of contaminants in potable water is a cause of worldwide concern. In particular, the presence of metals such as arsenic, lead, cadmium, mercury, chromium can affect human health. There is thus a need for advanced techniques of water decontamination. Adsorbents based on cerium dioxide (CeO₂), also named ‘ceria,’ have been used to remove contaminants such as arsenic, fluoride, lead and ...
DOI:
10.1007/s10311-018-0747-2

19. Change of arsenite adsorption mechanism during aging of 2-line ferrihydrite in the absence of oxygen

Author:
Wei Xiu; Huaming Guo; Xiaoqian Zhou; Richard B. Wanty; Michael Kersten
Source:
Applied geochemistry 2018 v.88 pp. 149-157
ISSN:
0883-2927
Subject:
adsorbents; adsorption; arsenic; arsenites; ferrihydrite; geochemistry; groundwater; oxygen; pH; remediation
Abstract:
... Arsenite was effectively immobilized by 2-line ferrihydrite at different pH values (4.0, 5.5 and 7.4) and adsorbent dosages (0.4, 1, and 2 g/L) in the absence of oxygen, showing an initial surface diffusion-controlled period (Stage I, <2 h) and a second mixed intra-particle and surface diffusion-controlled period (Stage II, >2 h). Dissolved δ56Fe increased during Stage I and decreased during Stage ...
DOI:
10.1016/j.apgeochem.2017.08.001

20. Clean application of magnetic biomaterial for the removal of As (III) from water

Author:
Agnes Pholosi; Bobby E. Naidoo; Augustine E. Ofomaja
Source:
Environmental science and pollution research international 2018 v.25 no.30 pp. 30348-30365
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; X-ray photoelectron spectroscopy; activation energy; adsorbents; adsorption; anion exchange; anions; arsenic; biobased products; biomass; humic acids; image analysis; ionic strength; iron; leaching; magnetism; magnetite; models; pH; scanning electron microscopes; sorption isotherms; transmission electron microscopes
Abstract:
... Magnetite-coated pine cone biomass was successfully synthesized, characterized, and its interaction with As (III) in water evaluated in order to apply it as an efficient adsorbent. Transmission electron microscope, scanning electron microscope, and imaging studies revealed that spherical magnetite particles were evenly distributed over the pine cone surface. Adsorption studies showed that the opti ...
DOI:
10.1007/s11356-018-2990-2

21. Comparative study on synchronous adsorption of arsenate and fluoride in aqueous solution onto MgAlFe-LDHs with different intercalating anions

Author:
Lu Hongtao; Liu Shuxia; Zhang Hua; Qiu Yanling; Yin Daqiang; Zhao Jianfu; Zhu Zhiliang
Source:
RSC advances 2018 v.8 no.58 pp. 33301-33313
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; aqueous solutions; arsenates; arsenic; carbonates; chlorides; drinking water; equations; fluorides; nitrates; pH; pollutants; pollution; scanning electron microscopy; sorption isotherms
Abstract:
... In this study, a series of MgAlFe-LDHs (Cl⁻, NO₃⁻, intercalation, and calcined products of a CO₃²⁻ interlayer) was synthesized and used for adsorption of arsenate and fluoride in individual contaminants and coexisting pollutant systems. Effects of various factors such as initial pH of solution, dosage of materials, coexisting ions, contact time, and initial pollutant concentrations were evaluated. ...
DOI:
10.1039/c8ra05968c

22. Competitive adsorption and desorption of arsenate, vanadate, and molybdate onto the low-cost adsorbent materials alum water treatment sludge and bauxite

Author:
Tao Hua; Richard J. Haynes; Ya-Feng Zhou
Source:
Environmental science and pollution research international 2018 v.25 no.34 pp. 34053-34062
ISSN:
0944-1344
Subject:
adsorbents; adsorption; alum; aluminum oxide; arsenates; arsenic; bauxite; desorption; molybdates; oxyanions; pH; sludge; sodium chloride; sorption isotherms; wastewater; water treatment
Abstract:
... When low-cost adsorbents are being used to remove contaminant ions (e.g. arsenate, vanadate, and molybdate) from wastewater, competitive adsorption/desorption are central processes determining their removal efficiency. Competitive adsorption of As, V, and Mo was investigated using equimolar oxyanion concentrations in single, binary, and tertiary combinations in adsorption isotherm and pH envelope ...
DOI:
10.1007/s11356-018-3301-7

23. Decontamination of Arsenic in Actual Water Samples by Calcium Containing Layered Double Hydroxides from a Convenient Synthesis Method

Author:
Hongtao Lu; Shuxia Liu; Hua Zhang; Yanling Qiu; Jianfu Zhao; Zhiliang Zhu
Source:
Water 2018 v.10 no.9 pp. -
ISSN:
2073-4441
Subject:
World Health Organization; adsorbents; adsorption; arsenates; arsenic; calcium; decontamination; drinking water; hydroxides; ions; mining; pH; rivers; solvents; water pollution; China
Abstract:
... A series of calcium-containing layered double hydroxides (LDHs) and calcined product (CLDH) were synthesized using a comparative simple synthesis method (without using organic solvents and with a shortened reaction time) and applied in the adsorption of arsenic in water. The adsorption performance of arsenate on these LDHs and CLDH were studied using batch tests. The effects of various factors dur ...
DOI:
10.3390/w10091150

24. Defective magnesium ferrite nano-platelets for the adsorption of As(V): The role of surface hydroxyl groups

Author:
Can Wu; Jingwei Tu; Chen Tian; Junjie Geng; Zhang Lin; Zhi Dang
Source:
Environmental pollution 2018 v.235 pp. 11-19
ISSN:
0269-7491
Subject:
World Health Organization; X-ray diffraction; adsorbents; adsorption; aqueous solutions; arsenic; crystal structure; drinking water; ferrimagnetic materials; hematite; ions; iron; maghemite; magnesium; moieties; nanospheres; remediation; scanning electron microscopy
Abstract:
... In this work, magnesium ferrite (MgFe₂O₄) nano-platelets with rich defects and abundant surface hydroxyl groups were synthesized, and used for the removal of low concentration As(V) in aqueous solution. Results from scanning electron microscopy (SEM) showed that the as-synthesized MgFe₂O₄ nano-platelets were consisted of many individual nanospheres. Rietveld refinement of X-ray diffraction (XRD) d ...
DOI:
10.1016/j.envpol.2017.12.050

25. Development of bark-based magnetic iron oxide particle (BMIOP), a bio-adsorbent for removal of arsenic (III) from water

Author:
Rajesh Manoharrao Dhoble; Pratap Reddy Maddigapu; Anand Govind Bhole; Sadhana Rayalu
Source:
Environmental science and pollution research international 2018 v.25 no.20 pp. 19657-19674
ISSN:
0944-1344
Subject:
adsorbents; adsorption; agitation; arsenic; drinking water; endothermy; equations; iron oxides; magnetic separation; magnetism; models; pH; sorption isotherms; temperature; thermodynamics
Abstract:
... Novel low-cost bark-based magnetic iron oxide particles (BMIOPs) were synthesized and investigated for the removal of As(III) in drinking water. The synthesized BMIOP had a saturation magnetization value of 38.62 emug⁻¹ which was found to be enough for the magnetic separation of exhausted BMIOP after As(III) adsorption. Parameters like agitation speed, adsorbent dosage, contact time, pH, temperatu ...
DOI:
10.1007/s11356-018-1792-x

26. Distribution of Heavy Metals and Minerals in the Various Size Fractions of Soil from Copșa Mică, România

Author:
Gheorghe Damian; Christof Lanzerstorfer; Floarea Damian; Gheorghe Iepure
Source:
Water, air, and soil pollution 2018 v.229 no.6 pp. 202
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; air; antimony; arsenic; cadmium; carbon; cation exchange capacity; copper; feldspar; heavy metals; laws and regulations; lead; montmorillonite; pollution; porosity; quartz; surface area; topsoil; zinc; Romania
Abstract:
... The Copşa Mică area is one of the most polluted anthropic sites in Romania. Because higher heavy metal concentrations occur in finer fractions, this research focuses on the size fraction < 500 μm. Two kilograms soil sample was sieved on the 500-μm sieve and was air classified into size fractions down to the low micrometer range. The size fraction’s composition was investigated by ICP-OES IC, XRD, ...
DOI:
10.1007/s11270-018-3862-6

27. Effects of the presence of organic matter on the removal of arsenic from groundwater

Author:
Adriana Saldaña-Robles; Cesar E. Damian-Ascencio; Ricardo J. Guerra-Sanchez; Alberto L. Saldaña-Robles; Noe Saldaña-Robles; Armando Gallegos-Muñoz; Sergio Cano-Andrade
Source:
Journal of cleaner production 2018 v.183 pp. 720-728
ISSN:
0959-6526
Subject:
acids; adsorbents; adsorption; arsenic; ferric hydroxide; filters; groundwater; irrigation; organic matter; pH; prediction; Mexico
Abstract:
... Arsenic is a natural contaminant present in groundwater mantles which, in high concentrations, causes severe health and environmental problems such as the degradation of human health and the contamination of land used for agriculture during irrigation. Understanding the process of arsenic removal from water contributes to the sustainability of regions where this problem is present. This work prese ...
DOI:
10.1016/j.jclepro.2018.02.161

28. Efficient multistep arsenate removal onto magnetite modified fly ash

Author:
Milica Karanac; Maja Đolić; Zlate Veličković; Ana Kapidžić; Valentin Ivanovski; Miodrag Mitrić; Aleksandar Marinković
Source:
Journal of environmental management 2018 v.224 pp. 263-276
ISSN:
0301-4797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; arsenates; arsenic; batch systems; desorption; endothermy; fly ash; industrial wastes; kinetics; liquids; magnetite; models; nitrogen; pH; porosimetry; response surface methodology; scanning electron microscopy; sorption isotherms; temperature; thermodynamics
Abstract:
... The modification of the fly ash (FA) by magnetite (M) was performed to obtain FAM adsorbent with improved adsorption efficiency for arsenate removal from water. The novel low cost adsorbents are characterized by liquid nitrogen porosimetry (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), Mössbauer spectroscopy (MB) and Fourier transform infrared (FTIR) spectroscopy. The optimal ...
DOI:
10.1016/j.jenvman.2018.07.051

29. Efficient removal of arsenic(III) from aqueous media using magnetic polyaniline-doped strontium–titanium nanocomposite

Author:
Mohammad Kazem Mohammadi Nodeh; Mohammad Ali Gabris; Hamid Rashidi Nodeh; Mehdi Esmaeili Bidhendi
Source:
Environmental science and pollution research international 2018 v.25 no.17 pp. 16864-16874
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; arsenic; chemical structure; energy-dispersive X-ray analysis; heat production; ions; magnetism; models; nanocomposites; nanoparticles; pH; polymerization; polymers; scanning electron microscopy; sorption isotherms
Abstract:
... In this study, a novel nanocomposite adsorbent based on magnetic polyaniline and strontium–titanium (MP-SrTiO₃) nanoparticles was synthesized via a simple and low-cost polymerization method for efficiently removing of arsenic(III) ions from aqueous samples. The chemical structure, surface properties, and morphology of the prepared adsorbent were studied using Fourier transform infrared spectroscop ...
DOI:
10.1007/s11356-018-1870-0

30. Enhanced Adsorption of p-Arsanilic Acid from Water by Amine-Modified UiO-67 as Examined Using Extended X-ray Absorption Fine Structure, X-ray Photoelectron Spectroscopy, and Density Functional Theory Calculations

Author:
Chen Tian; Jian Zhao; Xinwen Ou; Jieting Wan; Yuepeng Cai; Zhang Lin; Zhi Dang; Baoshan Xing
Source:
Environmental science & technology 2018 v.52 no.6 pp. 3466-3475
ISSN:
1520-5851
Subject:
World Health Organization; X-radiation; X-ray photoelectron spectroscopy; absorption; adsorbents; adsorption; arsenic; coordination polymers; density functional theory; drinking water; hydrogen bonding; moieties; pollutants; surface water; wastewater; China
Abstract:
... p-Arsanilic acid (p-ASA) is an emerging organoarsenic pollutant comprising both inorganic and organic moieties. For the efficient removal of p-ASA, adsorbents with high adsorption affinity are urgently needed. Herein, amine-modified UiO-67 (UiO-67-NH₂) metal–organic frameworks (MOFs) were synthesized, and their adsorption affinities toward p-ASA were 2 times higher than that of the pristine UiO-67 ...
DOI:
10.1021/acs.est.7b05761

31. Enhanced adsorption of arsenic onto alum sludge modified by calcination

Author:
Eun-Ki Jeon; Sori Ryu; Sung-Woo Park; Lei Wang; Daniel C.W. Tsang; Kitae Baek
Source:
Journal of cleaner production 2018 v.176 pp. 54-62
ISSN:
0959-6526
Subject:
X-ray diffraction; adsorbents; adsorption; alum; aluminum hydroxide; aluminum oxide; arsenic; crystallization; inorganic matter; microorganisms; organic matter; scanning electron microscopy; sludge; surface area; temperature; water treatment; zeta potential
Abstract:
... Alum sludge from water treatment facilities is composed mainly of aluminum hydroxide or aluminum oxide, which can adsorb As(V). However, microorganisms and organic/inorganic matter agglomerated together with raw alum sludge inhibit the adsorption of As(V) onto the material. Calcination was used to remove organic matter and activate the material, and the physical properties and adsorption character ...
DOI:
10.1016/j.jclepro.2017.12.153

32. Enhanced removal of arsenite and arsenate by a multifunctional Fe-Ti-Mn composite oxide: Photooxidation, oxidation and adsorption

Author:
Wei Zhang; Gaosheng Zhang; Caihong Liu; Juan Li; Tong Zheng; Jun Ma; Lu Wang; Jin Jiang; Xuedong Zhai
Source:
Water research 2018 v.147 pp. 264-275
ISSN:
0043-1354
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; arsenates; arsenic; arsenites; coprecipitation; iron; lighting; manganese; moieties; photooxidation
Abstract:
... In order to attain a high-efficiency and low-cost adsorbent for both arsenate (As(V)) and arsenite (As(III)) removal from As-contaminated water, a novel nanostructured Fe-Ti-Mn composite oxide (FTMO) was fabricated through a one-step simultaneous oxidation and co-precipitation method. Batch control experiments and series of spectroscopy detection technologies were carried out to investigate the su ...
DOI:
10.1016/j.watres.2018.10.001

33. Evaluation of natural quartz and zeolitic tuffs for As(V) removal from aqueous solutions: a mechanistic approach

Author:
F. Melak; E. Alemayehu; A. Ambelu; E. Van Ranst; G. Du Laing
Source:
International journal of environmental science and technology 2018 v.15 no.1 pp. 217-230
ISSN:
1735-1472
Subject:
adsorbents; aluminum; anions; aqueous solutions; arsenic; bicarbonates; buffering capacity; chlorides; drinking water; hydrolysis; iron; nitrates; pH; phosphates; pyroclastic materials; quartz; sorption; sorption isotherms; sulfates
Abstract:
... Naturally occurring pyroclastic materials, quartz-rich tuffs (Qz) and stellerite tuffs, were evaluated for their capacities to remove As(V) from aqueous solutions. The mechanism of As(V) uptake was evaluated using sequential extraction of As(V)-loaded adsorbent which entailed that the plausible removal mechanism is sorption to short-range ordered hydrous oxides of iron and aluminum. In addition, b ...
DOI:
10.1007/s13762-017-1379-y

34. Experimental dataset on adsorption of Arsenic from aqueous solution using Chitosan extracted from shrimp waste; optimization by response surface methodology with central composite design

Author:
Mohammad Hadi Dehghani; Mohammad Maroosi; Zoha Heidarinejad
Source:
Data in Brief 2018 v.20 pp. 1415-1421
ISSN:
2352-3409
Subject:
adsorbents; adsorption; aqueous solutions; arsenic; chitosan; data collection; pH; response surface methodology; shrimp
Abstract:
... The aim of data was to evaluate the efficiency of chitosan extracted from shrimp waste for Arsenic adsorption and optimization by response surface methodology (RSM) with central composite design (CCD). The data showed that, with increasing contact time, the amount of adsorption increased and the optimal contact time was about 60 min. With increasing pH decreased adsorption, although this reduction ...
DOI:
10.1016/j.dib.2018.09.003

35. Fabrication of porous covalent organic frameworks as selective and advanced adsorbents for the on-line preconcentration of trace elements against the complex sample matrix

Author:
Jing-Min Liu; Xing-Zhi Wang; Chao-Yue Zhao; Jia-Li Hao; Guo-Zhen Fang; Shuo Wang
Source:
Journal of hazardous materials 2018 v.344 pp. 220-229
ISSN:
0304-3894
Subject:
adsorbents; arsenic; atomic absorption spectrometry; cadmium; chromium; cobalt; copper; ions; manganese; molybdenum; nickel; selenium; solid phase extraction; statistical analysis; surface area; vanadium
Abstract:
... Herein, for the first time, the typical porous Covalent Organic Frameworks (COFs) CTpBD with superior chemical stability and large surface area were applied as sorbents for solid phase extraction of trace ions via flow injection followed by inductively coupled plasma mass spectrometry (ICP-MS) detection. The well-prepared and fully-characterized CTpBD COFs were filled in solid phase extraction car ...
DOI:
10.1016/j.jhazmat.2017.10.013

36. Facile synthesis of novel calcined magnetic orange peel composites for efficient removal of arsenite through simultaneous oxidation and adsorption

Author:
Khurram Shehzad; Chang Xie; Junyong He; Xingguo Cai; Weihong Xu; Jinhuai Liu
Source:
Journal of colloid and interface science 2018 v.511 pp. 155-164
ISSN:
0021-9797
Subject:
active sites; adsorbents; adsorption; aqueous solutions; arsenic; arsenites; cost effectiveness; groundwater; health hazards; ions; iron; ligands; magnetism; models; nanoparticles; orange peels; oxidation; porosity; sorption isotherms; surface area; wastes; water pollution
Abstract:
... Increasing exposure to arsenic (As) contaminated ground water has become a global health hazard to humanity. Suitable adsorbent for As removal from water, especially for As(III) than As(V), is an urgent but still a challenging task. In this study, waste orange peel (OP) was modified with magnetic nanoparticles followed by calcination as a novel adsorbent and investigated for instantaneous oxidatio ...
DOI:
10.1016/j.jcis.2017.09.110

37. Facilitative capture of As(V), Pb(II) and methylene blue from aqueous solutions with MgO hybrid sponge-like carbonaceous composite derived from sugarcane leafy trash

Author:
Ronghua Li; Wen Liang; Jim J. Wang; Lewis A. Gaston; Di Huang; Hui Huang; Shuang Lei; Mukesh Kumar Awasthi; Baoyue Zhou; Ran Xiao; Zengqiang Zhang
Source:
Journal of environmental management 2018 v.212 pp. 77-87
ISSN:
0301-4797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; arsenates; arsenic; biomass; carbon; crystals; hybridization; ionic strength; lead; magnesium; magnesium oxide; methylene blue; models; pH; pollutants; sorption isotherms; sugarcane; temperature; wastewater treatment
Abstract:
... Enhancing the contaminant adsorption capacity is a key factor affecting utilization of carbon-based adsorbents in wastewater treatment and encouraging development of biomass thermo-disposal. In this study, a novel MgO hybrid sponge-like carbonaceous composite (HSC) derived from sugarcane leafy trash was prepared through an integrated adsorption-pyrolysis method. The resulted HSC composite was char ...
DOI:
10.1016/j.jenvman.2017.12.034

38. Functional manganese ferrite/graphene oxide nanocomposites: effects of graphene oxide on the adsorption mechanisms of organic MB dye and inorganic As(v) ions from aqueous solution

Author:
Pham Thi Lan Huong; Nguyen Tu; Hoang Lan; Le Hong Thang; Nguyen Van Quy; Pham Anh Tuan; Ngo Xuan Dinh; Vu Ngoc Phan; Anh-Tuan Le
Source:
RSC advances 2018 v.8 no.22 pp. 12376-12389
ISSN:
2046-2069
Subject:
adsorbents; adsorption; anions; aqueous solutions; arsenic; binding sites; coprecipitation; electrostatic interactions; equations; ferrimagnetic materials; graphene oxide; heavy metals; iron; magnetic properties; manganese; methylene blue; models; moieties; nanocomposites; nanoparticles; nanosheets; pollutants; sorption isotherms
Abstract:
... In this study, manganese ferrite-graphene oxide (MFO-GO) nanocomposites were prepared via a co-precipitation reaction of Fe³⁺ and Mn²⁺ ions in a GO suspension. The effects of graphene oxide on the physicochemical characteristics, magnetic properties and adsorption activities of the MFO-GO nanocomposites were studied. Methylene blue (MB) and arsenic(v) were used in this study as model water polluta ...
DOI:
10.1039/c8ra00270c

39. Graphene Oxide Decorated with Cerium(IV) Oxide in Determination of Ultratrace Metal Ions and Speciation of Selenium

Author:
Anna Baranik; Rafal Sitko; Anna Gagor; Ignasi Queralt; Eva Marguí; Beata Zawisza
Source:
Analytical chemistry 2018 v.90 no.6 pp. 4150-4159
ISSN:
1520-6882
Subject:
X-ray fluorescence spectroscopy; adsorbents; adsorption; arsenic; cerium; copper; detection limit; dispersibility; energy-dispersive X-ray analysis; graphene oxide; groundwater; heavy metals; humic acids; kidneys; lead; metal ions; nanocomposites; selenates; selenites; selenium; sorption isotherms; swine
Abstract:
... Graphene oxide decorated with cerium(IV) oxide (GO/CeO₂) was synthesized and applied in adsorption of several metal ions such as As(III), As(V), Se(IV), Cu(II), and Pb(II) from aqueous samples. The important feature of GO/CeO₂ nanocomposite is also its selectivity toward selenite in the presence of selenate. The structure of GO/CeO₂ has been proven by microscopic and spectroscopic techniques. The ...
DOI:
10.1021/acs.analchem.8b00137

40. Highly Efficient Arsenite [As(III)] Adsorption by an [MIL-100(Fe)] Metal–Organic Framework: Structural and Mechanistic Insights

Author:
Y. Georgiou; J. A. Perman; A. B. Bourlinos; Y. Deligiannakis
Source:
Journal of physical chemistry 2018 v.122 no.9 pp. 4859-4869
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; arsenic; arsenites; carbonization; coordination polymers; electron paramagnetic resonance spectroscopy; graphene; iron; iron oxides; models; scanning electron microscopy; temperature; thermogravimetry; transmission electron microscopy
Abstract:
... The MIL-100(Fe) metal–organic framework presents a high As(III) uptake capacity of 120 mg g–¹. Mechanistic insights into the role of Fe sites versus carbon sites on As(III) uptake are provided by a comparative study of a series of MIL-100(Fe) calcinated at 600, 800, and 900 °C. Using powder X-ray diffraction, TEM, scanning electron microscopy, and N₂-porosimetry, we have mapped the morphology evol ...
DOI:
10.1021/acs.jpcc.7b11247

41. Highly-efficient removal of AsV, Pb2+, Fe3+, and Al3+ pollutants from water using hierarchical, microscopic TiO2 and TiOF2 adsorbents through batch and fixed-bed columnar techniques

Author:
Hassanien Gomaa; Mohamed A. Shenashen; Hitoshi Yamaguchi; Ahmad S. Alamoudi; Mohamed Abdelmottaleb; Mohamed F. Cheira; Tarek A. Seaf El-Naser; Sherif A. El-Safty
Source:
Journal of cleaner production 2018 v.182 pp. 910-925
ISSN:
0959-6526
Subject:
adsorbents; adsorption; aluminum; arsenic; health services; heavy metals; humans; ions; iron; lakes; lead; pH; perchloric acid; pollutants; sodium hydroxide; squirrels; tap water; titanium dioxide; toxins; trapping
Abstract:
... Treating water containing hazardous toxins by using a simple and inexpensive method is essential for human healthcare and environment. Here, the highly efficient removal of arsenic, lead, iron and aluminum pollutants (>99.5%) from water were evaluated through batch and filter-like fixed column designs by using microscopic titanium oxide and oxyfluoride captors, to produce toxin-free water for huma ...
DOI:
10.1016/j.jclepro.2018.02.063

42. Hybrid mineral@silsesquioxane particles for water remediation: synthesis, characterization and application as adsorbent of As(V) and other water pollutants

Author:
Carolina V. Waiman; Ignacio E. dell’Erba; Carlos A. Chesta; María Lorena Gómez
Source:
Journal of materials science 2018 v.53 no.18 pp. 12781-12794
ISSN:
0022-2461
Subject:
X-ray diffraction; adsorbents; adsorption; arsenic; calorimetry; infrared spectroscopy; light scattering; minerals; nanocomposites; pollutants; remediation; scanning electron microscopy; thermogravimetry; zeta potential
Abstract:
... Mineral-coated silsesquioxane particles of approximately 600 nm diameter were synthesized from the hydrolytic co-condensation of N-[3-trimethoxysilyl]-propyl]ethylenediamine (DAS) and tetraethyl orthosilicate (TEOS). The hybrid particles involve nanocomposites with a mineral core (montmorillonite—MMT—or goethite—Gt—nanoparticles) and coated with a silsesquioxane shell containing hydroxyl and amine ...
DOI:
10.1007/s10853-018-2529-4

43. Identification of Fe and Zr oxide phases in an iron-zirconium binary oxide and arsenate complexes adsorbed onto their surfaces

Author:
Xiaomin Dou; Gui-Chang Wang; Mengqiang Zhu; Fudong Liu; Wei Li; Dinesh Mohan; Charles U. Pittman
Source:
Journal of hazardous materials 2018 v.353 pp. 340-347
ISSN:
0304-3894
Subject:
X-ray photoelectron spectroscopy; adsorbents; adsorption; arsenates; arsenic; density functional theory; goethite; iron; iron oxides; lepidocrocite; synergism; zirconium; zirconium oxide
Abstract:
... The Fe-Zr binary oxide adsorbents have higher arsenic adsorptive capacities than either iron oxide or zirconium oxide alone, indicating a strong synergistic effect exists between Fe and Zr oxides. However, no generally accepted in-depth explanations have been reached on the origin of this better performance. In the present study, the component phases, the active surface sites, the structure of the ...
DOI:
10.1016/j.jhazmat.2018.04.004

44. Improved waste-sourced biocomposite for simultaneous removal of crude oil and heavy metals from synthetic and real oilfield-produced water

Author:
Razegheh Akhbarizadeh; Farid Moore; Dariush Mowla; Behnam Keshavarzi
Source:
Environmental science and pollution research international 2018 v.25 no.31 pp. 31407-31420
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; arsenic; biocomposites; chemical reactions; energy-dispersive X-ray analysis; heavy metals; ions; kinetics; models; montmorillonite; oil fields; petroleum; pollutants; scanning electron microscopy; shrimp shells; sorption isotherms; wastewater treatment; water pollution
Abstract:
... Oil- and gas-produced water (PW) which contains various pollutants is an enormous threat to the environment. In this study, a novel low-cost bio-adsorbent was prepared from shrimp shell and acid-activated montmorillonite. The results of FT-IR spectroscopy, energy dispersive X-ray (EDX) analysis, and SEM-EDX technique indicated that the chitosan-activated montmorillonite (CTS-A-MMT) was prepared su ...
DOI:
10.1007/s11356-018-3136-2

45. Influence of heavy metals on the adsorption of arsenate by magnetite nanoparticles: Kinetics and thermodynamic

Author:
Esmaeel Darezereshki; Ahmad khodadadi Darban; Mahmoud Abdollahy; Ahmad Jamshidi-Zanjani
Source:
Environmental nanotechnology, monitoring & management 2018 v.10 pp. 51-62
ISSN:
2215-1532
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aluminum; arsenates; arsenic; cations; copper; endothermy; heavy metals; iron; kinetics; magnetite; manganese; metal ions; mine tailings; nanoparticles; pH; sodium hydroxide; temperature; thermodynamics; transmission electron microscopy
Abstract:
... Magnetite nanoparticles were produced from iron ore tailings and used to remove arsenate ions from water. The produced spherical nanoparticles were 25 ± 3 nm in diameter and had ferromagnetic properties as discovered by XRD, FTIR, TEM, and VSM analyses. The kinetic and equilibrium of the arsenate (As⁵⁺) adsorption by the magnetite nanoparticles was investigated in the presence of Cu²⁺, Zn²⁺and Mn² ...
DOI:
10.1016/j.enmm.2018.04.002

46. Investigation of Arsenic Removal from Water by Iron-Mixed Mesoporous Pellet in a Continuous Fixed-Bed Column

Author:
Borano Te; Boonchai Wichitsathian; Chatpet Yossapol; Watcharapol Wonglertarak
Source:
Water, air, and soil pollution 2018 v.229 no.9 pp. 296
ISSN:
0049-6979
Subject:
adsorbents; adsorption; arsenates; arsenic; arsenites; clay; iron; iron oxides; models; pH; porous media
Abstract:
... Natural clay combing with iron oxide and iron particle was developed to be iron-mixed mesoporous pellet that was packed in a fixed-bed column for removing arsenic from water. The performance of the column in terms of breakthrough curve analysis was investigated with the variations of influent flow rate, adsorbent bed height, initial solution pH, and initial adsorbate concentration. The results ind ...
DOI:
10.1007/s11270-018-3935-6

47. Iron Mesh-Based Metal Organic Framework Filter for Efficient Arsenic Removal

Author:
Dawei Wang; Stanley E. Gilliland; Xinbei Yi; Kayla Logan; Denver R. Heitger; Heather R. Lucas; Wei-Ning Wang
Source:
Environmental science & technology 2018 v.52 no.7 pp. 4275-4284
ISSN:
1520-5851
Subject:
active sites; adsorbents; adsorption; arsenates; arsenic; arsenites; colorimetry; coordination polymers; electron paramagnetic resonance spectroscopy; fluorescence; groundwater; groundwater contamination; heat; hydrogen peroxide; hydroxyl radicals; iron; oxidation; oxygen; porous media; remediation; surface area; toxicity
Abstract:
... Efficient oxidation from arsenite [As(III)] to arsenate [As(V)], which is less toxic and more readily to be adsorbed by adsorbents, is important for the remediation of arsenic pollution. In this paper, we report a metal organic framework (MIL-100(Fe)) filter to efficiently remove arsenic from synthetic groundwater. With commercially available iron mesh as a substrate, MIL-100(Fe) is implanted thro ...
DOI:
10.1021/acs.est.7b06212

48. MOF derived iron oxide-based smart plasmonic Ag/Au hollow and porous nanoshells “ultra-microelectrodes” for ultra-sensitive detection of arsenic

Author:
Zhenlu Zhao; Ziwei Zhang; Chuanping Li; Haoxi Wu; Jianrong Wang; Yizhong Lu
Source:
Journal of materials chemistry 2018 v.6 no.33 pp. 16164-16169
ISSN:
2050-7496
Subject:
active sites; adsorbents; adsorption; arsenic; detection limit; electrochemistry; engineering; gold; iron; iron oxides; nanoparticles; nanosilver; oxygen; pyrolysis; redox reactions; silver; synergism
Abstract:
... Engineering sensitive gold-based nanostructured “ultra-microelectrode” systems have been an essential part of As(iii) sensing due to their high theoretical efficiency, high oxygen overpotential, high abundance and environmental benignity. However, it is still challenging to increase the specific active sites and enhance the electrocatalytic activity, the lack of which significantly limits the over ...
DOI:
10.1039/c8ta05093g

49. Magnetic responsive Fe3O4-ZIF-8 core-shell composites for efficient removal of As(III) from water

Author:
Jiang-Bo Huo; Lei Xu; Jia-Cheng E. Yang; Hao-Jie Cui; Baoling Yuan; Ming-Lai Fu
Source:
Colloids and surfaces 2018 v.539 pp. 59-68
ISSN:
0927-7757
Subject:
X-ray diffraction; adsorbents; adsorption; anions; aqueous solutions; arsenic; carbonates; chlorides; colloids; endothermy; entropy; iron oxides; magnetism; nitrates; phosphates; scanning electron microscopy; sorption isotherms; sulfates; surface area; transmission electron microscopy; water treatment
Abstract:
... Water stable Fe3O4@ZIF-8 composites were successfully fabricated by a facile modification. The composites were characterized by powder XRD, SEM, TEM and BET surface areas measurement. The results showed that as-obtained Fe3O4@ZIF-8 composites possess core-shell structures (Fe3O4 as core and ZIF-8 as shell) with a high surface area (1133m2g−1). The composites were also evaluated for adsorption of A ...
DOI:
10.1016/j.colsurfa.2017.12.010

50. Multifunctional photoactive and selective adsorbent for arsenite and arsenate: Evaluation of nano titanium dioxide-enabled chitosan cross-linked with copper

Author:
Lauren N. Pincus; Fjodor Melnikov; Jamila S. Yamani; Julie B. Zimmerman
Source:
Journal of hazardous materials 2018 v.358 pp. 145-154
ISSN:
0304-3894
Subject:
adsorbents; adsorption; arsenates; arsenic; arsenites; chelation; chitosan; copper; crosslinking; environmental factors; ions; phosphates; photooxidation; titanium; ultraviolet radiation
Abstract:
... A novel multifunctional sorbent material of nano-titanium dioxide-enabled chitosan beads cross-linked with copper (CuTICB) is capable of photo-oxidation of As(III) to the less-toxic and more easily adsorbed As(V) in UV light and selective adsorption of arsenite (As(III)) and arsenate (As(V)) in the presence of phosphate, a strong adsorptive competitor and inhibitor of arsenic removal performance. ...
DOI:
10.1016/j.jhazmat.2018.06.033