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1. 3D-printed highly porous and reusable chitosan monoliths for Cu(II) removal

Author:
Dongxing Zhang; Junfeng Xiao; Qiuquan Guo; Jun Yang
Source:
Journal of materials science 2019 v.54 no.8 pp. 6728-6741
ISSN:
0022-2461
Subject:
EDTA (chelating agent); adsorbents; adsorption; chitosan; copper; cost effectiveness; desorption; equations; heavy metals; human health; metal ions; models; moieties; pH; pollution; pollution control; sorption isotherms; surface area; working conditions
Abstract:
... Removal of heavy metal pollution has received considerable research attention due to its severe effects on human health. In the present study, for the first time, a reusable monolithic 3D porous adsorbing filter was fabricated by integrating 3D printing technique with a natural adsorbent (chitosan), which is a low-cost and highly effective solution for heavy metal removal. The –NH₂ and –OH functio ...
DOI:
10.1007/s10853-019-03332-y

2. ADM1-based modeling of methane production from acidified sweet sorghum extract in a two stage process

Author:
Georgia Antonopoulou; Hariklia N. Gavala; Ioannis V. Skiadas; Gerasimos Lyberatos
Source:
Bioresource technology 2012 v.106 no. pp. 10-19
ISSN:
0960-8524
Subject:
anaerobic digesters; anaerobic digestion; chemical oxygen demand; equations; hydrogen; methane; methane production; models; pH; prediction; processing stages; sweet sorghum; volatile fatty acids
Abstract:
... The present study focused on the application of the Anaerobic Digestion Model 1 on the methane production from acidified sorghum extract generated from a hydrogen producing bioreactor in a two-stage anaerobic process. The kinetic parameters for hydrogen and volatile fatty acids consumption were estimated through fitting of the model equations to the data obtained from batch experiments. The simula ...
DOI:
10.1016/j.biortech.2011.11.088
PubMed:
22197333

3. Accounting for dissociation and photolysis: A review of the algal toxicity of triclosan

Author:
Jayne Roberts; Oliver R. Price; Nicola Bettles; Cecilie Rendal; Roger van Egmond
Source:
Environmental toxicology and chemistry 2014 v.33 no.11 pp. 2551-2559
ISSN:
0730-7268
Subject:
freshwater; economics; uncertainty; photolysis; compliance; equations; models; bioaccumulation factor; risk assessment; dissociation; toxicity testing; pH; growth retardation; wavelengths; toxicity; anti-infective agents; microalgae
Abstract:
... Triclosan, an antimicrobial agent commonly used in down‐the‐drain consumer products, is toxic to freshwater microalgae. However, the rapid photolysis and pH‐dependent dissociation of this compound may give rise to uncertainty in growth inhibition tests with freshwater microalgae, if these are not well characterized. Methods are presented to minimize these uncertainties by stabilizing pH with an or ...
DOI:
10.1002/etc.2710
PubMed:
25099165

4. Accumulation mechanism of tetracycline hydrochloride from aqueous solutions by nylon microplastics

Author:
Lujian Lin; Shuai Tang; Xue Song Wang; Xuan Sun; Zhaoxian Han; Yu Chen
Source:
Environmental technology & innovation 2020 v.18 pp. 100750
ISSN:
2352-1864
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; activation energy; aqueous solutions; desorption; digestive system; enthalpy; entropy; equations; heat production; ionic strength; lead; mariculture; metal ions; microplastics; models; nylon; pH; scanning electron microscopes; scanning electron microscopy; sorption; sorption isotherms; temperature; tetracycline; van der Waals forces
Abstract:
... Nylon microplastics and tetracycline hydrochloride (TH) coexist ubiquitously in the coastal aquaculture areas. In this study, the nylon microplastics were characterized by the scanning electron microscope (SEM) and Fourier transform-infrared spectroscopy (FTIR). Kinetic experiments were performed at various microplastics size and reaction temperature, respectively. The effects of adsorbate concent ...
DOI:
10.1016/j.eti.2020.100750

5. Accuracy and biases in predicting the chemical and physical traits of many types of cheeses using different visible and near-infrared spectroscopic techniques and spectrum intervals

Author:
Giorgia Stocco; Claudio Cipolat-Gotet; Alessandro Ferragina; Paolo Berzaghi; Giovanni Bittante
Source:
Journal of dairy science 2019 v.102 no.11 pp. 9622-9638
ISSN:
0022-0302
Subject:
Bayesian theory; cheese industry; cheese quality; chemical composition; chemometrics; color; equations; fresh cheeses; models; molds (fungi); near-infrared spectroscopy; pH; portable equipment; prediction; reflectance; texture; transmittance; wavelengths
Abstract:
... Near-infrared spectroscopy (NIRS) has been widely used to determine various composition traits of many dairy products in the industry. In the last few years, near-infrared (NIR) instruments have become more and more accessible, and now, portable devices can be easily used in the field, allowing the direct measurement of important quality traits. However, the comparison of the predictive performanc ...
DOI:
10.3168/jds.2019-16770

6. Activated Sericite: An Efficient and Effective Natural Clay Material for Attenuation of Cesium from Aquatic Environment

Author:
D. TIWARI; LALHMUNSIAMA; S.I. CHOI; S.M. LEE
Source:
Pedosphere 2014 v.24 no.6 pp. 731-742
ISSN:
1002-0160
Subject:
aquatic environment; cesium; clay; data collection; electrolytes; equations; hydrochloric acid; mica; models; pH; soil erosion; sorption; sorption isotherms; surface area
Abstract:
... Sericite is mica-based natural clay that is annealed at 800 °C for 4 h, followed by acid activation using 3.0 mol L−1 HCl at 100 °C. The interaction of cesium (I), Cs(I), with sericite could provide useful data for the study of soil erosion or mass water movement utilizing the natural radioactive Cs. In this study sericite and activated sericite were used to assess their suitability in the attenua ...
DOI:
10.1016/S1002-0160(14)60060-6

7. Activated carbon adsorption of quinolone antibiotics in water: Performance, mechanism, and modeling

Author:
Hao Fu; Xuebing Li; Jun Wang; Pengfei Lin; Chao Chen; Xiaojian Zhang; I.H. (Mel) Suffet
Source:
Journal of environmental sciences (China) 2017 v.56 pp. 145-152
ISSN:
1001-0742
Subject:
activated carbon; adsorption; antibiotics; aquatic environment; ciprofloxacin; drinking water; electrostatic interactions; enrofloxacin; environmental health; equations; hydrophobic bonding; ionization; models; pH; prediction; sorption isotherms; water treatment
Abstract:
... The extensive use of antibiotics has led to their presence in the aquatic environment, and introduces potential impacts on human and ecological health. The capability of powdered activated carbon (PAC) to remove six frequently used quinolone (QN) antibiotics during water treatment was evaluated to improve drinking water safety. The kinetics of QN adsorption by PAC was best described by a pseudo se ...
DOI:
10.1016/j.jes.2016.09.010

8. Activated carbons from banana peels for the removal of nickel ions

Author:
E. Bibaj; K. Lysigaki; J. W. Nolan; M. Seyedsalehi; E. A. Deliyanni; A. C. Mitropoulos; G. Z. Kyzas
Source:
International journal of environmental science and technology 2019 v.16 no.2 pp. 667-680
ISSN:
1735-1472
Subject:
Gibbs free energy; activated carbon; adsorption; banana peels; enthalpy; entropy; equations; hot water treatment; ions; models; nickel; pH; phosphoric acid; pollutants; pyrolysis; scanning electron microscopy; surface area; temperature
Abstract:
... This work aims the study of two types of activated carbons, produced with hydrothermal treatment (BAC-H samples) and pyrolysis (BAC-P samples) using from banana peels as source. The activation was done with H₃PO₄ (at three different temperatures 400, 500, 600 °C) in order to examine the effect of this time differentiation. The samples prepared a brief characterization which was also presented obse ...
DOI:
10.1007/s13762-018-1676-0

9. Addressing the electrostatic component of protons binding to aquatic nanoparticles beyond the Non-Ideal Competitive Adsorption (NICA)-Donnan level: Theory and application to analysis of proton titration data for humic matter

Author:
José Paulo Pinheiro; Elise Rotureau; Jérôme F.L. Duval
Source:
Journal of colloid and interface science 2021 v.583 pp. 642-651
ISSN:
0021-9797
Subject:
adsorption; automation; equations; models; pH; particle size; titration
Abstract:
... Charge descriptors of aquatic nanoparticles (NPs) are evaluated from proton titration curves measured at different salt concentrations and routinely analysed by the Non-Ideal Competitive Adsorption-Donnan (NICAD) model. This model, however, suffers from approximations regarding particle electrostatics, which may bias particle charge estimation. Implementation of Poisson-Boltzmann (PB) theory withi ...
DOI:
10.1016/j.jcis.2020.09.059

10. Adsorption Optimization of Lead (II) Using Saccharum Bengalense as a Non-Conventional Low Cost Biosorbent: Isotherm and Thermodynamics Modeling

Author:
Muhammad Imran Din; Zaib Hussain; Muhammad Latif Mirza; Asma Tufail Shah; Muhammad Makshoof Athar
Source:
International journal of phytoremediation 2014 v.16 no.9 pp. 889-908
ISSN:
1549-7879
Subject:
Saccharum; adsorbents; adsorption; aqueous solutions; biomass; biosorbents; energy; enthalpy; entropy; equations; ions; lead; models; pH; phytoremediation; pulp
Abstract:
... In the present study a novel biomass, derived from the pulp of Saccharum bengalense , was used as an adsorbent material for the removal of Pb (II) ions from aqueous solution. After 50 minutes contact time, almost 92% lead removal was possible at pH 6.0 under batch test conditions. The experimental data was analyzed using Langmuir, Freundlich, Timken and Dubinin-Radushkevich two parameters isotherm ...
DOI:
10.1080/15226514.2013.803025

11. Adsorption and Desorption Properties of Macroporous Resins for Anthocyanins from the Calyx Extract of Roselle (Hibiscus sabdariffa L.)

Author:
Chang Xiu-Lian; Wang Dong; Chen Bi-Yun; Feng Yong-Mei; Wen Shao-Hong; Zhan Peng-Yuan
Source:
Journal of agricultural and food chemistry 2012 v.60 no.9 pp. 2368-2376
ISSN:
1520-5118
Subject:
Hibiscus sabdariffa; adsorption; anthocyanins; calyx; citric acid; desorption; equations; ethanol; models; pH; resins
Abstract:
... Adsorption of roselle anthocynins, a natural pigment, onto various macroporous resins was optimized to develop a simple and efficient process for industrial separation and purification of roselle anthocyanins. Nine different macroporous resins (AB-8, X-5, HPD-100, SP-207, XAD-4, LS-305A, DM-21, LS-610B, and LS-305) were evaluated for the adsorption properties of the anthocyanins extracted from the ...
DOI:
10.1021/jf205311v
PubMed:
22329796

12. Adsorption and Transport of Arsenic(V) in Experimental Subsurface Systems

Author:
L. Elizabeth Williams; Mark O. Barnett; Timothy A. Kramer; Joel G. Melville
Source:
Journal of environmental quality 2003 v.32 no.3 pp. 841-850
ISSN:
1537-2537
Subject:
adsorption; arsenic; equations; ferric oxide; laboratory experimentation; models; pH; soil; sorption isotherms
Abstract:
... The adsorption and transport of As(V) in a heterogeneous, iron oxide–containing soil was investigated in batch and column laboratory experiments. The As(V) adsorbed rapidly to the soil over the first 48 h, but continued to adsorb slowly over the next several weeks, clearly indicating the potential for rate-limited transport. The equilibrium As(V) adsorption isotherm was markedly nonlinear, further ...
DOI:
10.2134/jeq2003.8410
PubMed:
12809285

13. Adsorption and dyeing properties of acid dyes on fine denier silk fibers

Author:
Sheng Sun; Yuansong Zhang; Yushan Zou; Fangyin Dai; Shixiong Yi
Source:
Textile research journal 2020 v.90 no.3-4 pp. 433-441
ISSN:
1746-7748
Subject:
acid orange 7; adsorption; color; dyeing; equations; fabrics; kinetics; models; pH; silk; temperature; textile fibers
Abstract:
... In this work, the surface morphology and diameter distribution of fine denier silk fiber were observed and measured. The adsorption property of acid orange 7 on the fine denier silk fiber was studied. The pseudo-first-order model and pseudo-second-order model adsorption kinetic models were employed to evaluate the experimental data. The effects of pH values and reaction temperature on the dyeing p ...
DOI:
10.1177/0040517519869389

14. Adsorption and flocculation of bentonite by chitosan with varying degree of deacetylation and molecular weight

Author:
Jin Li; Xuanyu Song; Jinfen Pan; Lian Zhong; Shufang Jiao; Qimin Ma
Source:
International journal of biological macromolecules 2013 v.62 pp. 4-12
ISSN:
0141-8130
Subject:
adsorption; bentonite; chitosan; equations; flocculation; models; molecular weight; neutralization; pH; salts; tap water; turbidity; zeta potential
Abstract:
... Chitosans with different degrees of deacetylation (DD) and molecular weights (Mw) were tested for the flocculation of bentonite suspensions prepared with demineralized water (DW) and tap water (TW), respectively. Flocculation kinetics model of particles collisions combining zeta potential and turbidity measurements was employed to investigate the effects of the DD and Mw of the chitosans on the fl ...
DOI:
10.1016/j.ijbiomac.2013.08.009

15. Adsorption and mechanism study for phosphonate antiscalant HEDP removal from reverse osmosis concentrates by magnetic La/Zn/Fe3O4@PAC composite

Author:
Chuang Li; Qingfeng Yang; Shengsen Lu; Yangqiao Liu
Source:
Colloids and surfaces 2021 v.613 pp. 126056
ISSN:
0927-7757
Subject:
activated carbon; adsorbents; adsorption; calcium; desalination; ecosystems; endothermy; equations; hardness; hydrogen; lanthanum; ligands; magnetic fields; models; pH; phosphonates; reverse osmosis; sorption isotherms; thermodynamics; zinc
Abstract:
... Phosphonate antiscalants are extensively used in reverse osmosis (RO) desalination processes to prevent scaling and improve the recovery of produced water. However, It is desirable to remove them before the disposal of RO concentrate, because the presence of phosphonate antiscalants may impede the removal of hardness from concentrates and affect the ecosystem. In this study, a highly efficient mag ...
DOI:
10.1016/j.colsurfa.2020.126056

16. Adsorption and recovery of U(vi) from low concentration uranium solution by amidoxime modified Aspergillus niger

Author:
Le Li; Nan Hu; Dexin Ding; Xin Xin; Yongdong Wang; Jinhua Xue; Hui Zhang; Yan Tan
Source:
RSC advances 2015 v.5 no.81 pp. 65827-65839
ISSN:
2046-2069
Subject:
Aspergillus niger; Fourier transform infrared spectroscopy; Gibbs free energy; adsorption; biosorbents; biosorption; desorption; endothermy; energy-dispersive X-ray analysis; enthalpy; entropy; equations; hydrochloric acid; models; pH; scanning electron microscopy; sorption isotherms; uranium; uranyl ions; wastewater
Abstract:
... Amidoxime modified Aspergillus niger (AMAN) was prepared by the oximation reaction. The effects of the initial pH, contact time, initial U(vi) concentration and biosorbent dose on the adsorption of U(vi) ions from radioactive wastewater in U(vi) concentrations of less than 1 mg L⁻¹ by AMAN and the raw Aspergillus niger (RAN) were investigated. The maximum adsorption efficiency by AMAN for the 0.5 ...
DOI:
10.1039/c5ra13516h

17. Adsorption behavior of Ni(II) onto activated carbons from hide waste and high-pressure steaming hide waste

Author:
Jiaojiao Kong; Rong Gu; Junnan Yuan; Wanqun Liu; Jincheng Wu; Zhenghao Fei; Qinyan Yue
Source:
Ecotoxicology and environmental safety 2018 v.156 pp. 294-300
ISSN:
0147-6513
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; activated carbon; adsorbents; adsorption; desorption; electrostatic interactions; endothermy; enthalpy; equations; heavy metals; kinetics; models; nickel; pH; scanning electron microscopy; sorption isotherms; steaming; surface area; temperature; wastes
Abstract:
... This work reports the preparation and adsorption of Ni(II) via activated carbons which produced from hide waste (HWAC) and high-pressure steaming hide waste (HWSAC) with potassium silicate as the activating agent. The best preparation condition for HWAC and HWSAC was the activation temperature of 700 °C using an impregnation ratio of 2:1. Both of them were characterized by N2 adsorption/desorption ...
DOI:
10.1016/j.ecoenv.2018.03.017

18. Adsorption behavior of fluoroquinolone(ciprofloxacin) using zinc oxide impregnated activated carbon prepared from jack fruit peel: Kinetics and isotherm studies

Author:
N. Magesh; A.Annam Renita; R. Siva; N. Harirajan; A. Santhosh
Source:
Chemosphere 2022 v.290 pp. 133227
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; activated carbon; adsorbents; adsorption; biomass; ciprofloxacin; equations; fruit peels; models; nanocomposites; pH; sorption isotherms; zinc oxide
Abstract:
... Ciprofloxacin is a pharmaceutical component used for treating various tract infections. This is considered as an emerging contaminant due to the release of unreacted components getting disposed into the water bodies. This component is effectively treated using renewable biomass, which is converted into a useful renewable low-cost adsorbent material. Discarded Jack Fruit Peel (JFP) is used as an ac ...
DOI:
10.1016/j.chemosphere.2021.133227

19. Adsorption behaviors of Au(Ⅲ) onto humic acid extracted from gold ore: Adsorptive kinetics, isotherm and mechanism

Author:
Huiqun Niu; Hongying Yang; Linlin Tong
Source:
Colloids and surfaces 2021 v.630 pp. 127442
ISSN:
0927-7757
Subject:
adsorption; endothermy; equations; gold; heat; humic acids; models; pH; sorption isotherms
Abstract:
... Humic acid is an important component of carbonaceous matters in the carbon-containing gold ores, which possesses gold-adsorbing capability and leads to the gold loss due to its structural characterization and physicochemical properties. In this paper, the adsorption characteristics of humic acid extracted from refractory carbon-containing gold concentrate were investigated, the adsorption kinetic ...
DOI:
10.1016/j.colsurfa.2021.127442

20. Adsorption characteristics and behavior of a graphene oxide–Al₁₃ composite for cadmium ion removal from aqueous solutions

Author:
Lu Yan; Qian Zhao; Tingshun Jiang; Xiufang Liu; Yingying Li; Weibing Fang; Hengbo Yin
Source:
RSC advances 2015 v.5 no.83 pp. 67372-67379
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; cadmium; endothermy; enthalpy; entropy; equations; graphene; hydrolysis; models; pH; scanning electron microscopy; sorption isotherms; temperature
Abstract:
... Graphene oxide–Al₁₃ (GO–Al₁₃) composites were synthesized by a hydrolysis method on the basis of graphite oxide and were characterized by XRD, FT-IR and SEM. The adsorption of Cd²⁺ onto the GO–Al₁₃ composite was investigated as a function of pH, temperature and adsorbent dose. Langmuir and Freundlich models were employed to describe the adsorption equilibrium. The adsorption kinetic was investigat ...
DOI:
10.1039/c5ra10174c

21. Adsorption characteristics of copper (II) ions from aqueous solution onto humic acid-immobilized surfactant-modified zeolite

Author:
Jianwei Lin; Yanhui Zhan; Zhiliang Zhu
Source:
Colloids and surfaces 2011 v.384 no.1-3 pp. 9-16
ISSN:
0927-7757
Subject:
Gibbs free energy; activation energy; adsorption; aqueous solutions; cetylpyridinium chloride; colloids; copper; energy; enthalpy; entropy; equations; humic acids; ion exchange; ions; models; pH; zeolites
Abstract:
... Humic acid (HA) was immobilized onto surfactant-modified zeolite (SMZ) which was prepared by the loading of cetylpyridinium bromide (CPB) onto natural zeolite. The adsorption behavior of Cu(II) from aqueous solution onto HA-immobilized SMZ (HA-SMZ) was investigated. HA-SMZ exhibited higher adsorption efficiency for Cu(II) than SMZ. The adsorption efficiency of Cu(II) onto HA-SMZ increased with the ...
DOI:
10.1016/j.colsurfa.2011.02.044

22. Adsorption characteristics of modified sand for the removal of hexavalent chromium ions from aqueous solutions: Kinetic, thermodynamic and equilibrium studies

Author:
Sandeep Yadav; Varsha Srivastava; Sushmita Banerjee; Chih-Huang Weng; Yogesh C. Sharma
Source:
Catena 2013 v.100 pp. 120-127
ISSN:
0341-8162
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; chromium; energy-dispersive X-ray analysis; equations; heat production; ions; models; pH; sand; scanning electron microscopy; sorption isotherms; temperature
Abstract:
... The objective of this study is to investigate the removal of Cr(VI) from aqueous solutions by using modified sand as adsorbent. The modified sand was characterized by Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDX) and FTIR. pHzpc of the raw and modified sands was found to be 6.98 and 6.66, respectively. Removal efficiency of the modified sand was investigated by using b ...
DOI:
10.1016/j.catena.2012.08.002

23. Adsorption kinetic studies for removal of methylene blue using activated carbon prepared from sugar beet pulp

Author:
D. Li; J. Yan; Z. Liu
Source:
International journal of environmental science and technology 2016 v.13 no.7 pp. 1815-1822
ISSN:
1735-1472
Subject:
activated carbon; adsorption; equations; kinetics; methylene blue; models; nitrogen; pH; phosphoric acid; sorption isotherms; sugar beet pulp; temperature
Abstract:
... Sugar beet pulp is an abundant, renewable and low-cost precursor for production of activated carbon. In the present study, sugar beet pulp based activated carbon was prepared by using phosphoric acid as activating agent for adsorption of methylene blue. The conditions of preparation process had a significant influence on the adsorption of methylene blue, and the optimal preparation conditions were ...
DOI:
10.1007/s13762-016-1012-5

24. Adsorption kinetics, capacity and mechanism of arsenate and phosphate on a bifunctional TiO₂–Fe₂O₃ bi-composite

Author:
Mitch D’Arcy; Dominik Weiss; Michael Bluck; Ramon Vilar
Source:
Journal of colloid and interface science 2011 v.364 no.1 pp. 205-212
ISSN:
0021-9797
Subject:
adsorbents; adsorption; arsenates; arsenic; equations; groundwater; models; pH; phosphates; titanium dioxide
Abstract:
... Mixed oxide TiO₂–Fe₂O₃ bi-composites have been recognised as efficient and economical sorbents with great promise for arsenic removal from groundwater. In this study, we use a fast, simple and inexpensive synthesis method for this type of bi-composite and assess its adsorption performance. The kinetics of arsenate and phosphate adsorption onto the bi-composite are determined, demonstrating rapid a ...
DOI:
10.1016/j.jcis.2011.08.023

25. Adsorption kinetics, isotherm, and thermodynamics studies of acetyl-11-keto-β-boswellic acids (AKBA) from Boswellia serrata extract using macroporous resin

Author:
Sonali S. Niphadkar; Virendra K. Rathod
Source:
Preparative biochemistry & biotechnology 2017 v.47 no.8 pp. 804-812
ISSN:
1532-2297
Subject:
Boswellia serrata; Gibbs free energy; adsorbents; adsorption; anti-inflammatory agents; desorption; enthalpy; entropy; equations; heat production; kinetics; models; pH; porous media; resins; sorption isotherms; temperature
Abstract:
... An acetyl-11-keto- β -boswellic acid (AKBA) is potent anti-inflammatory agent found in Boswellia serrata oleogum resin. Adsorption characteristics of AKBA from B. serrata were studied using macroporous adsorbent resin to understand separation and adsorption mechanism of targeted molecules. Different macroporous resins were screened for adsorption and desorption of AKBA and Indion 830 was screened ...
DOI:
10.1080/10826068.2017.1342263

26. Adsorption of (−)-epigallocatechin-3-gallate (EGCG) onto oat β-glucan

Author:
Ruiping Gao; Hui Liu; Zhen Peng; Zhen Wu; Yuxue Wang; Guohua Zhao
Source:
Food chemistry 2012 v.132 no.4 pp. 1936-1943
ISSN:
0308-8146
Subject:
adsorption; dialysis; equations; food quality; hydrogen bonding; models; oats; pH; polyphenols; response surface methodology; sensory properties; sorption isotherms; tea; temperature
Abstract:
... Polyphenol–polysaccharide interaction attracted much attention due to its crucial impact on the functional and sensory quality of foods. Monomers of tea polyphenols (TP) were selectively adsorbed by oat β-glucan and (−)-epigallocatechin gallate (EGCG) was the mostly adsorbed one in terms of adsorption capacity (qₑ) and efficiency (Eₑ) determined by equilibrium dialysis. Contrast to Langmuir, Freun ...
DOI:
10.1016/j.foodchem.2011.12.029

27. Adsorption of 2,4-dichlorophenoxyacetic acid and 4-chloro-2-metylphenoxyacetic acid onto activated carbons derived from various lignocellulosic materials

Author:
Beata Doczekalska; Krzysztof Kuśmierek; Andrzej Świątkowski; Monika Bartkowiak
Source:
Journal of environmental science and health 2018 v.53 no.5 pp. 290-297
ISSN:
1532-4109
Subject:
2,4-D; MCPA (herbicide); Miscanthus; activated carbon; adsorbents; adsorption; aqueous solutions; data analysis; equations; flax; hemp; kinetics; lignocellulose; models; pH; sorption isotherms
Abstract:
... Adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) and 4-chloro-2-metylphenoxyacetic acid (MCPA) from aqueous solution onto activated carbons derived from various lignocellulosic materials including willow, miscanthus, flax, and hemp shives was investigated. The adsorption kinetic data were analyzed using two kinetic models: the pseudo-first order and pseudo-second order equations. The adsorptio ...
DOI:
10.1080/03601234.2017.1421840

28. Adsorption of 3,4-dihydroxybenzoic acid onto hematite surface in aqueous medium: Importance of position of phenolic –OH groups and understanding of the same using catechol as an auxiliary model

Author:
Nabanita Saikia; Jyotirmoy Sarma; Jayanta M Borah; Sekh Mahiuddin
Source:
Journal of colloid and interface science 2013 v.398 no. pp. 227-233
ISSN:
0021-9797
Subject:
adsorption; catechol; electrolytes; equations; hematite; models; pH; solubility; spectroscopy; vibration
Abstract:
... A comparative adsorption kinetics, isotherms, dissolution and surface complexation of 3,4-dihydroxybenzoic acid (3,4-DHBA) and 1,2-dihydroxybenzene (catechol) at the hematite/electrolyte interface were investigated. The kinetics at pH 10 and 298.15K suggested that the adsorption behaviour of 3,4-DHBA and catechol onto hematite surface is similar and attain same equilibration time of 60min. The ads ...
DOI:
10.1016/j.jcis.2013.02.028

29. Adsorption of Alizarin Red S Dye by Carbon Nanotubes: An Experimental and Theoretical Investigation

Author:
Machado Fernando M.; Carmalin Sophia A.; Lima Eder C.; Dias Silvio L. P.; Prola Lizie D. T.; Saucier Caroline; Jauris Iuri M.; Zanella Ivana; Fagan Solange B.
Source:
The Journal of Physical Chemistry C 2016 v.120 no.32 pp. 18296-18306
ISSN:
1932-7455
Subject:
adsorption; alizarin; aqueous solutions; carbon nanotubes; electrostatic interactions; enthalpy; entropy; equations; models; pH; temperature
Abstract:
... This study evaluated the feasibility of removing Alizarin Red S dye (ARS) from aqueous solutions, using nanoadsorbents such as single and multiwalled carbon nanotubes (SWCNT and MWCNT, respectively). The effect of pH, shaking time, and temperature on adsorption was studied. The pH 2.0 was observed to show optimum removal for both of the carbon nanotubes. The equilibrium time (298–318 K) was fixed ...
DOI:
10.1021/acs.jpcc.6b03884

30. Adsorption of Anionic-Azo Dye from Aqueous Solution by Lignocellulose-Biomass Jute Fiber: Equilibrium, Kinetics, and Thermodynamics Study

Author:
Roy Aparna; Chakraborty Sumit; Kundu Sarada Prasad; Adhikari Basudam; Majumder S. B.
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.37 pp. 12095-12106
ISSN:
1520-5045
Subject:
absorption; adsorbents; adsorption; aqueous solutions; biomass; desorption; engineering; equations; heat production; jute; lignocellulose; models; pH; response surface methodology; sodium hydroxide; sorption isotherms; temperature
Abstract:
... The present investigation describes the evaluation of feasibility of lignocellulosic-biomass jute fiber (JF) toward adsorptive removal of anionic-azo dye from aqueous solution. Batch studies illustrated that dye uptake was highly dependent on different process variables, pH, initial dye concentration of solution, adsorbent dosage, and temperature. Further, an attempt has been taken to correlate th ...
DOI:
10.1021/ie301708e

31. Adsorption of As(III) on chitosan-Fe-crosslinked complex (Ch-Fe)

Author:
Helen Helena dos Santos; Carla Albertina Demarchi; Clovis Antonio Rodrigues; Jean Marc Greneche; Nataliya Nedelko; Anna Ślawska-Waniewska
Source:
Chemosphere 2011 v.82 no.2 pp. 278-283
ISSN:
0045-6535
Subject:
adsorption; arsenic; chitosan; crosslinking; equations; iron; kinetics; models; pH; redox reactions; sorption isotherms; spectroscopy
Abstract:
... It was reported the adsorption of As(III) on the surface of the chitosan-Fe-crosslinked complex. Theoretical correlation of the experimental equilibrium adsorption data for As(III)/Ch-Fe system is best explained by the non-linearized form Langmuir–Freundlich isotherm model. At optimum conditions, pH 9.0, the maximum adsorption capacity, calculated using the Langmuir–Freundlich isotherm model was 1 ...
DOI:
10.1016/j.chemosphere.2010.09.033
PubMed:
20943252

32. Adsorption of Cd(II) by rhizosphere and non-rhizosphere soil originating from mulberry field under laboratory condition

Author:
Yongbing Jiang; Renzhi Huang; Shimeng Jiang; Zhixiong Qin; Xinpei Yan
Source:
International journal of phytoremediation 2018 v.20 no.4 pp. 378-383
ISSN:
1549-7879
Subject:
adsorption; cadmium; cation exchange capacity; equations; ion exchange; ions; laboratory experimentation; models; mulberries; pH; phytoremediation; polluted soils; rhizosphere; roots; soil organic matter; sorption isotherms; trees
Abstract:
... In this study, the adsorption behavior of Cd ions by rhizosphere soil (RS) and non-rhizosphere soil (NS) originated from mulberry field was investigated. The Langmuir, Freundlich and the Dubinin–Radushkevich (D-R) equations were used to evaluate the type and efficiency of Cd adsorption. The RS was characterized by lower pH but the higher content of soil organic matter and cation exchange capacity ...
DOI:
10.1080/15226514.2017.1393396

33. Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons

Author:
Joanna Lach
Source:
Water 2019 v.11 no.6 pp. -
ISSN:
2073-4441
Subject:
activated carbon; adsorption; air; carbon dioxide; chloramphenicol; equations; micropores; models; pH; sorption isotherms; surface area; water treatment; water vapor
Abstract:
... The aim of the study was to evaluate the possibility of applying commercial activated carbons currently used in water treatment plants and modified carbon at 400 and 800 °C in the atmosphere of air, water vapour and carbon dioxide to remove chloramphenicol. Adsorption kinetics was examined for solutions with pH of 2–10. Adsorption kinetics were determined for the initial concentration of ...
DOI:
10.3390/w11061141

34. Adsorption of Clofibric Acid from Aqueous Solution by Graphene Oxide and the Effect of Environmental Factors

Author:
Ya-Lei Zhang; Yan-Jing Liu; Chao-Meng Dai; Xue-Fei Zhou; Shu-Guang Liu
Source:
Water, air, and soil pollution 2014 v.225 no.8 pp. 2064
ISSN:
0049-6979
Subject:
adsorption; clofibric acid; environmental factors; equations; graphene; humic acids; ionic strength; models; pH; sorption isotherms; wastewater; wastewater treatment
Abstract:
... Graphene oxide (GO) nanosheets were used as adsorbent material for the removal of clofibric acid (CA) which was difficult to be removed from wastewater by traditional wastewater treatment technique. Adsorption kinetics, adsorption equilibrium, and effect of pH, ionic strength, and humic acid (HA) of the adsorption of CA onto the GO nanosheets in aqueous solution were investigated in detail. Adsorp ...
DOI:
10.1007/s11270-014-2064-0

35. Adsorption of Cr(VI) and As(V) ions by modified magnetic chitosan chelating resin

Author:
Y.G. Abou El-Reash; M. Otto; I.M. Kenawy; A.M. Ouf
Source:
International journal of biological macromolecules 2011 v.49 no.4 pp. 513-522
ISSN:
0141-8130
Subject:
crosslinking; temperature; X-ray diffraction; sodium hydroxide; chitosan; equations; arsenic; models; glutaraldehyde; scanning electron microscopy; pH; Fourier transform infrared spectroscopy; sorption isotherms; mass transfer; chromium; metal ions; anthranilic acid; desorption; adsorption
Abstract:
... Cross-linked magnetic chitosan anthranilic acid glutaraldehyde Schiff's base (CAGS) was prepared for adsorption of both As(V) and Cr(VI) ions and their determination by ICP-OES. Prepared cross-linked magnetic CAGS was investigated by means of SEM, FTIR, wide angle X-ray diffraction (WAXRD) and TGA analysis. The adsorption properties of cross-linked magnetic CAGS resin toward both As(V) and Cr(VI) ...
DOI:
10.1016/j.ijbiomac.2011.06.001

36. Adsorption of Mercury on Coarse Loamy Mixed Hyperthermic Ustic Haplocambids of Punjab

Author:
Kuldip Singh; Dhanwinder Singh; H.S. Hundal
Source:
Journal of the Indian Society of Soil Science 2012 v.60 no.1 pp. 8-12
ISSN:
0974-0228
Subject:
Haplocambids; adsorption; energy; equations; heat; mercury; models; pH; remediation; soil solution; sorption isotherms; temperature; water pollution
Abstract:
... A coarse loamy mixed hyperthermic Ustic Haplocambid of Punjab was used in a laboratory study to test it for remediation of mercury (Hg) contaminated water using adsorption mechanism. In this study, the Langmuir adsorption model proved to be reasonable approximation of mercury adsorption onto the soil. With the increase in equilibrated soil solution temperature from 278 to 318 μK, the bonding energ ...

37. Adsorption of Ni(II), Cu(II) and Cd(II) from aqueous solutions by amino modified nanostructured microfibrillated cellulose

Author:
Sanna Hokkanen; Eveliina Repo; Terhi Suopajärvi; Henrikki Liimatainen; Jouko Niinimaa; Mika Sillanpää
Source:
Cellulose 2014 v.21 no.3 pp. 1471-1487
ISSN:
0969-0239
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; cadmium; cellulose; copper; equations; ions; models; nickel; pH; sorption isotherms
Abstract:
... The aim of the present study was to investigate the adsorption properties of aminopropyltriethoxysilane (APS) modified microfibrillated cellulose (MFC) in aqueous solutions containing Ni(II), Cu(II) and Cd(II) ions. The modified adsorbents were characterized using elemental analysis, Fourier transform infrared spectroscopy, SEM and zeta potential analysis. The adsorption and regeneration studies w ...
DOI:
10.1007/s10570-014-0240-4

38. Adsorption of Victoria blue by carbon/Ba/alginate beads: Kinetics, thermodynamics and isotherm studies

Author:
M. Kumar; R. Tamilarasan; V. Sivakumar
Source:
Carbohydrate polymers 2013 v.98 no.1 pp. 505-513
ISSN:
0144-8617
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; activated carbon; adsorbents; adsorption; barium; enthalpy; entropy; equations; models; pH; polymers; scanning electron microscopy; sorption isotherms; temperature
Abstract:
... The kinetic, thermodynamic and isotherm modeling studies were carried out on adsorptive removal of Victoria blue (VB) dye using activated carbon, Ba/alginate and modified carbon/Ba/alginate polymer beads. The feasibility of sorption process was determined by varying the experimental parameters viz., dye concentration (4–20mgL−1), contact time (10–90min), pH (3–10), adsorbent dose (0.5–2.5g) and te ...
DOI:
10.1016/j.carbpol.2013.05.078

39. Adsorption of ammonium ion by coconut shell-activated carbon from aqueous solution: kinetic, isotherm, and thermodynamic studies

Author:
Ramasamy Boopathy; Sekar Karthikeyan; Asit Baran Mandal; Ganesan Sekaran
Source:
Environmental science and pollution research international 2013 v.20 no.1 pp. 533-542
ISSN:
0944-1344
Subject:
adsorbents; adsorption; ammonia; ammonium; ammonium chloride; aqueous solutions; carbon; coconuts; distillation; enthalpy; equations; heat production; human population; models; nitrogen; odors; pH; research; sorption isotherms; taste; temperature; water pollution
Abstract:
... Ammonium ions are one of the most encountered nitrogen species in polluted water bodies. High level of ammonium ion in aqueous solution imparts unpleasant taste and odor problems, which can interfere with the life of aquatics and human population when discharged. Many chemical methods are developed and being used for removal of ammonium ion from aqueous solution. Among various techniques, adsorpti ...
DOI:
10.1007/s11356-012-0911-3

40. Adsorption of anion polyacrylamide from aqueous solution by polytetrafluoroethylene (PTFE) membrane as an adsorbent: Kinetic and isotherm studies

Author:
Bing Zhang; Wenxin Shi; Shuili Yu; Youbing Zhu; Ruijun Zhang; Joo Hwa Tay
Source:
Journal of colloid and interface science 2019 v.544 pp. 303-311
ISSN:
0021-9797
Subject:
adsorbents; adsorption; aqueous solutions; endothermy; equations; hydrogen bonding; microfiltration; models; pH; polyacrylamide; polytetrafluoroethylene; sorption isotherms; temperature; thermodynamics
Abstract:
... In this study, the kinetic and isothermal behaviors of anion polyacrylamide (APAM) on a polytetrafluoroethylene (PTFE) microfiltration membrane were investigated to better understand the adsorption mechanism. A series of adsorption experiments were conducted to determine the effects of the initial APAM concentration, contact time, solution pH and temperature on the adsorption performance. The resu ...
DOI:
10.1016/j.jcis.2019.03.008

41. Adsorption of anionic azo-dyes from aqueous solutions onto graphene oxide: Equilibrium, kinetic and thermodynamic studies

Author:
Wojciech Konicki; Małgorzata Aleksandrzak; Dariusz Moszyński; Ewa Mijowska
Source:
Journal of colloid and interface science 2017 v.496 pp. 188-200
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; aqueous solutions; atomic force microscopy; azo dyes; data analysis; endothermy; equations; graphene oxide; heat production; kinetics; models; pH; scanning electron microscopy; temperature; thermogravimetry; transmission electron microscopy; zeta potential
Abstract:
... In the present study, graphene oxide (GO) was used for the adsorption of anionic azo-dyes such as Acid Orange 8 (AO8) and Direct Red 23 (DR23) from aqueous solutions. GO was characterized by Fourier Transform-Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Thermogravimetric Analysis (TGA), Atomic Force Microscopy (AFM), X-ray Diffraction (XRD), Scanning Electron Microscopy (S ...
DOI:
10.1016/j.jcis.2017.02.031

42. Adsorption of anionic surfactant (sodium dodecyl sulfate) on silica

Author:
Pengxiang Li; Munehide Ishiguro
Source:
Soil science and plant nutrition 2016 v.62 no.3 pp. 223-229
ISSN:
1747-0765
Subject:
adsorption; agrochemicals; anionic surfactants; electrolytes; electrostatic interactions; equations; hydrophobic bonding; hydrophobicity; models; pH; silica; sodium dodecyl sulfate; soil; zeta potential
Abstract:
... The adsorption of an anionic surfactant sodium dodecyl sulfate (SDS) on a negatively charged silica was studied to provide a better understanding of surfactant adsorption phenomena in an electrostatic repulsion environment between surfactant and soil. The adsorption experiment was conducted under different electrolyte concentration and pH. Results indicated that adsorption happened with hydrophobi ...
DOI:
10.1080/00380768.2016.1191969

43. Adsorption of arsenate from aqueous solution by ferric oxide-impregnated Dowex Marathon MSA anion exchange resin: application of non-linear isotherm modeling and thermodynamic studies

Author:
Sujitra Tandorn; Orn-anong Arqueropanyo; Wimol Naksata; Ponlayuth Sooksamiti; Ingon Chaisri
Source:
Environmental earth sciences 2019 v.78 no.5 pp. 136
ISSN:
1866-6280
Subject:
Gibbs free energy; adsorbents; adsorption; anion exchange resins; aqueous solutions; arsenates; arsenic; endothermy; enthalpy; entropy; equations; models; pH; regression analysis; sorption isotherms; temperature
Abstract:
... The characteristic of adsorption of As(V) onto ferric oxide-impregnated anion resin Dowex marathon MSA (FO-Dowex) was investigated. Batch adsorption experiment was studied as a function of pH, contact time, initial As(V) concentration, and temperature. The results revealed that the adsorption of As(V) onto FO-Dowex was highly pH-dependent and that the equilibrium time was attained within 360 min. ...
DOI:
10.1007/s12665-019-8138-y

44. Adsorption of cadmium ions using the bioadsorbent of Pichia kudriavzevii YB5 immobilized by polyurethane foam and alginate gels

Author:
Wenyu Zhao; Ting Zhou; Junxiang Zhu; Xun Sun; Ying Xu
Source:
Environmental science and pollution research international 2018 v.25 no.4 pp. 3745-3755
ISSN:
0944-1344
Subject:
Pichia kudriavzevii; adsorbents; adsorption; alginate gels; biomass; cadmium; calcium chloride; crosslinking; endothermy; equations; foams; food safety; hydrolysates; ions; models; oysters; pH; polyurethanes; sodium alginate; thermodynamics
Abstract:
... Pichia kudriavzevii YB5, mutated from Pichia kudriavzevii A16 with a strong ability to remove cadmium ions, was immobilized by polyurethane foam and alginate gels in this work. The immobilization conditions were optimized as follows: sodium alginate concentration of 2% (w/v), calcium chloride concentration of 2% (w/v), biomass dose of 1 × 10⁹ cell/mL, and cross-linking time for 4 h. Then, the resu ...
DOI:
10.1007/s11356-017-0785-5

45. Adsorption of diclofenac onto organoclays: Effects of surfactant and environmental (pH and temperature) conditions

Author:
Tiago De Oliveira; Régis Guégan; Thomas Thiebault; Claude Le Milbeau; Fabrice Muller; Vinicius Teixeira; Marcelo Giovanela; Mohammed Boussafir
Source:
Journal of hazardous materials 2017 v.323 pp. 558-566
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; activated carbon; adsorption; aquatic environment; cationic surfactants; cations; diclofenac; drugs; electrostatic interactions; equations; gas chromatography; mass spectrometry; models; pH; temperature; thermodynamics; toxicity; wastewater treatment
Abstract:
... Among pharmaceutical products (PPs) recalcitrant to water treatments, diclofenac shows a high toxicity and remains at high concentration in natural aquatic environments. The aim of this study concerns the understanding of the adsorption mechanism of this anionic PP onto two organoclays prepared with two long-alkyl chains cationic surfactants showing different chemical nature for various experiment ...
DOI:
10.1016/j.jhazmat.2016.05.001

46. Adsorption of direct yellow 12 from aqueous solutions by an iron oxide-gelatin nanoadsorbent; kinetic, isotherm and mechanism analysis

Author:
Ali Alinejad- Mir; Ali Akbar Amooey; Shahram Ghasemi
Source:
Journal of cleaner production 2018 v.170 pp. 570-580
ISSN:
0959-6526
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; chemical composition; coprecipitation; crystallites; equations; iron; kinetics; models; nanocomposites; pH; particle size; scanning electron microscopy; sorption isotherms
Abstract:
... Fe₃O₄–gelatin was synthesized via a controlled co–precipitation method to obtain uniform and high efficient nanocomposite for direct yellow 12 (DY12) removal. The effect of dose of adsorbent, pH, contact time and initial dye concentration on the removal of DY12 was examined. The adsorbent morphology and chemical composition were evaluated using FE–SEM, VSM, FT–IR, XRD and BET. The analyses for cha ...
DOI:
10.1016/j.jclepro.2017.09.101

47. Adsorption of emulsified oil from metalworking fluid on activated bleaching earth-chitosan-SDS composites: Optimization, kinetics, isotherms

Author:
Nitiya Naowanat; Nutthavich Thouchprasitchai; Sangobtip Pongstabodee
Source:
Journal of environmental management 2016 v.169 pp. 103-115
ISSN:
0301-4797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; bleaching; confidence interval; contact angle; desorption; equations; experimental design; models; oils; pH; sorption isotherms; sulfates; temperature; zeta potential
Abstract:
... The adsorption of emulsified oil from metalworking fluid (MWF) on activated bleaching earth (BE)-chitosan-sodium dodecyl sulfate (SDS) composites (BE/MCS) was investigated under a statistical design of experiments at a 95% confidence interval to identify the critical factors and to optimize the adsorption capacity. The BE/MCS adsorbents were characterized by means of X-ray diffraction, Fourier tra ...
DOI:
10.1016/j.jenvman.2015.12.024

48. Adsorption of heavy metal ions from aqueous solution by polyrhodanine-encapsulated magnetic nanoparticles

Author:
Jooyoung Song; Hyeyoung Kong; Jyongsik Jang
Source:
Journal of colloid and interface science 2011 v.359 no.2 pp. 505-511
ISSN:
0021-9797
Subject:
adsorbents; adsorption; aqueous solutions; equations; heavy metals; magnetic fields; magnetic properties; mercury; metal ions; models; nanoparticles; oxidation; pH; polymerization; sorption isotherms; wastewater
Abstract:
... Polyrhodanine-coated γ-Fe₂O₃ nanoparticles, synthesized by one-step chemical oxidation polymerization, were applied to the process of removal of heavy metal ions from aqueous solution. Factors influencing the uptake of heavy metal ions such as solution pH, initial metal ion concentration, contact time, and species of metal ions were investigated systematically by batch experiments. The adsorption ...
DOI:
10.1016/j.jcis.2011.04.034

49. Adsorption of lanthanum (III) from aqueous solution using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester-grafted magnetic silica nanocomposites

Author:
Dongbei Wu; Yanhong Sun; Qigang Wang
Source:
Journal of hazardous materials 2013 v.260 pp. 409-419
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; acid tolerance; adsorption; aqueous solutions; desorption; durability; equations; lanthanum; metal ions; models; nanocomposites; pH; phosphorous acid; silica; sorption isotherms
Abstract:
... In view of increasing attention of magnetic materials in the field of separation science and technology, we provide an effective route for fabrication of a new magnetic material with high adsorption capacity and selectivity toward metal ions, excellent acid resistance property and long service life. Silica was firstly coated on the magnetic particles, and then silane-coupling agent (3-chloropropyl ...
DOI:
10.1016/j.jhazmat.2013.05.042

50. Adsorption of lead ion from aqueous solution by modified walnut shell: kinetics and thermodynamics

Author:
Shenmaishang Li; Zuoxiang Zeng; Weilan Xue
Source:
Environmental technology 2019 v.40 no.14 pp. 1810-1820
ISSN:
1479-487X
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; data analysis; energy; equations; lead; maleic anhydrides; models; pH; scanning electron microscopy; sorption isotherms; temperature; thermodynamics; walnut hulls
Abstract:
... The novel modified walnut shell (WNS-MAH) with higher adsorption capacity for lead ion was prepared by reacting walnut shell (WNS) with maleic anhydride. Both WNS and WNS-MAH were analyzed by SEM and FTIR. The adsorption capacity of WNS-MAH for lead ion was evaluated at different adsorbent doses, pHs, time and temperatures. The adsorption kinetics and adsorption isotherms were investigated from (2 ...
DOI:
10.1080/09593330.2018.1430172

51. Adsorption of mercury ions from wastewater by a hyperbranched and multi-functionalized dendrimer modified mixed-oxides nanoparticles

Author:
M. Arshadi; F. Mousavinia; A. Khalafi-Nezhad; H. Firouzabadi; A. Abbaspourrad
Source:
Journal of colloid and interface science 2017 v.505 pp. 293-306
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; atomic absorption spectrometry; chelation; cysteine; dendrimers; electrostatic interactions; energy-dispersive X-ray analysis; equations; heat production; hydrolysis; ions; kinetics; mass transfer; mercury; models; nanoparticles; nitrogen; nuclear magnetic resonance spectroscopy; oxides; pH; reflectance; scanning electron microscopy; temperature; toxicity; transmission electron microscopy; triazines; ultraviolet-visible spectroscopy; wastewater; zeta potential; Persian Gulf
Abstract:
... In this paper, a novel heterogeneous nanodendrimer with generation of G2.0 was prepared by individual grafting of diethylenetriamine, triazine and l-cysteine methyl ester on the modified aluminum–silicate mixed oxides as a potent adsorbent of Hg(II) ions from aqueous media. The prepared nanodendrimer was characterized by nuclear magnetic resonance spectrum (¹H NMR and ¹³C NMR), Fourier transform i ...
DOI:
10.1016/j.jcis.2017.05.052

52. Adsorption of methyl orange from aqueous solution by aminated pumpkin seed powder: Kinetics, isotherms, and thermodynamic studies

Author:
Munagapati Venkata Subbaiah; Dong-Su Kim
Source:
Ecotoxicology and environmental safety 2016 v.128 pp. 109-117
ISSN:
0147-6513
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; desorption; equations; kinetics; methyl orange; models; pH; pumpkins; scanning electron microscopy; sodium hydroxide; sorption isotherms; temperature; thermodynamics
Abstract:
... Present research discussed the utilization of aminated pumpkin seed powder (APSP) as an adsorbent for methyl orange (MO) removal from aqueous solution. Batch sorption experiments were carried to evaluate the influence of pH, initial dye concentration, contact time, and temperature. The APSP was characterized by using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy ( ...
DOI:
10.1016/j.ecoenv.2016.02.016

53. Adsorption of methyl violet using pH- and temperature-sensitive cellulose filament/poly(NIPAM-co-AAc) hybrid hydrogels

Author:
Min Zhang; Yuan Li; Qili Yang; Liulian Huang; Lihui Chen; Huining Xiao
Source:
Journal of materials science 2018 v.53 no.16 pp. 11837-11854
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; acrylic acid; adsorption; atomic force microscopy; cellulose; composite polymers; copolymerization; crosslinking; desorption; endothermy; equations; free radicals; gentian violet; hybridization; hydrogels; models; pH; scanning electron microscopy; sorption isotherms; temperature; thermodynamics; thermogravimetry
Abstract:
... Cellulose filament (CF) was modified via hybridization with poly (N-isopropylacrylamide-co-acrylic acid), which was prepared by free radical copolymerization of two monomers: N-isopropylacrylamide (NIPAM) as the thermosensitive component and acrylic acid (AAc) as the pH sensitive component. The copolymer was characterized with scanning electron microscopy (SEM), atomic force microscopy (AFM), Four ...
DOI:
10.1007/s10853-018-2342-0

54. Adsorption of methylene blue from aqueous solution by graphene

Author:
Tonghao Liu; Yanhui Li; Qiuju Du; Jiankun Sun; Yuqin Jiao; Guangming Yang; Zonghua Wang; Yanzhi Xia; Wei Zhang; Kunlin Wang; Hongwei Zhu; Dehai Wu
Source:
Colloids and surfaces 2012 v.90 no. pp. 197-203
ISSN:
0927-7765
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; colloids; equations; graphene; methylene blue; models; pH; sorption isotherms; surface area; temperature; thermodynamics; transmission electron microscopy
Abstract:
... Graphene was prepared using a modified Hummers’ method. The physico-chemical properties of graphene were characterized by TEM, BET specific surface area, FTIR, Raman and XRD measurements. The effect factors including pH, contact time, temperature and dosage on the adsorption properties of methylene blue onto graphene were investigated. The experimental data of isotherm followed the Langmuir isothe ...
DOI:
10.1016/j.colsurfb.2011.10.019

55. Adsorption of naphthalene onto high-surface-area nanoparticle loaded activated carbon by high performance liquid chromatography: response surface methodology, isotherm and kinetic study

Author:
Mehrorang Ghaedi; Anahita Daneshyar; Arash Asfaram; Mihir Kumar Purkait
Source:
RSC advances 2016 v.6 no.59 pp. 54322-54330
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; activated carbon; adsorbents; adsorption; aqueous solutions; equations; high performance liquid chromatography; kinetics; models; nanoparticles; naphthalene; pH; particle size distribution; response surface methodology; scanning electron microscopy; surface area; transmission electron microscopy; zinc sulfide
Abstract:
... Naphthalene removal from aqueous solution was investigated using zinc sulfide nanoparticle loaded activated carbon (ZnS-NPs-AC). The concentration of naphthalene was determined using high performance liquid chromatography (HPLC). The prepared ZnS-NPs-AC was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM ...
DOI:
10.1039/c6ra09500c

56. Adsorption of sulfate ion from water by zirconium oxide-modified biochar derived from pomelo peel

Author:
Hanting Ao; Wei Cao; Yixia Hong; Jun Wu; Lin Wei
Source:
Science of the total environment 2020 v.708 pp. 135092
ISSN:
0048-9697
Subject:
X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; aqueous solutions; biochar; citrus peels; equations; fluorides; models; nitrates; organochlorine compounds; pH; phosphates; scanning electron microscopy; sulfates; surface area; zirconium; zirconium oxide
Abstract:
... Zirconium oxide-modified pomelo peel biochar (ZrBC) was synthesized for the adsorption of sulfate ion from aqueous solution. Zirconyl chloride octahydrate (ZCO) was used to modify pomelo peel biochar into ZrBC. The optimal dose of ZCO for modification is 0.5 mol/L, at which ZrBC shows the highest adsorption of sulfate ion. The adsorbents were characterized by the field emission scanning electron m ...
DOI:
10.1016/j.scitotenv.2019.135092

57. Adsorption of zearalenone by Aspergillus japonicus conidia: new trends for biological decontamination in animal feed

Author:
G. Jard; T. Liboz; F. Mathieu; A. Guyonvarc'h; A. Lebrihi
Source:
World mycotoxin journal 2009 v.2 no.4 pp. 391-397
ISSN:
1875-0796
Subject:
Aspergillus japonicus; Fusarium; adsorption; animal health; conidia; decontamination; equations; feed contamination; feeds; grains; heat treatment; in vitro studies; models; pH; stomach; swine; zearalenone
Abstract:
... Zearalenone (ZEA) is an oestrogenic mycotoxin produced by Fusarium spp. on a wide variety of grains. The presence of ZEA impairs farm animal health. In this study, the ability to remove ZEA by conidia of Aspergilli was evaluated in vitro. This mycotoxin was successfully eliminated in vitro by living and heat-treated conidia just after conidial inoculation, especially by Aspergillus japonicus Mu541 ...
DOI:
10.3920/WMJ2008.1128

58. Adsorption performance of Cr(vi) onto Al-free and Al-substituted ferrihydrites

Author:
Chunyan Ni; Shan Liu; Linjing Cui; Zhao Han; Lin Wang; Rufen Chen; Hui Liu
Source:
RSC advances 2016 v.6 no.71 pp. 66412-66419
ISSN:
2046-2069
Subject:
Gibbs free energy; adsorbents; adsorption; aluminum; anions; carbonates; chromium; desorption; endothermy; enthalpy; entropy; equations; ferrihydrite; fluorides; heavy metals; industrial wastewater; iron; models; oxalates; oxides; pH; sediments; sorption isotherms; sulfates; temperature
Abstract:
... Metal (hydr)oxides are ubiquitous in subsurface sediments. Therefore, investigating the adsorption and desorption of Cr(vi) on ferrihydrite (Fh) and Al-substituted ferrihydrite (FAh) is highly important in understanding the fate and transport of heavy metals in subsediments at their initial sources. In the present paper, both Fh and FAh were prepared on the basis of the abundance of Al and Fe elem ...
DOI:
10.1039/c6ra09465a

59. Adsorption performance of red mud magnetic composite material modified by Spirit‐based distillers' grains for low‐concentration phosphorus in water

Author:
Jingjing Lu; Yan Xie; Mei Meng; Yang Cao; Lunwei Feng; Xianquan Ao; Min Yang
Source:
Journal of chemical technology and biotechnology 2022 v.97 no.9 pp. 2648-2657
ISSN:
0268-2575
Subject:
adsorbents; adsorption; biotechnology; carbon; chemical precipitation; composite materials; electrostatic interactions; endothermy; entropy; equations; magnetic separation; magnetism; models; pH; phosphates; phosphorus; sorption isotherms; surface area; wastewater
Abstract:
... BACKGROUND: Research on phosphate removal has focused on high‐phosphorus wastewater, which has difficulty meeting the discharge standard through one‐step processing. Herein, the rich carbon source of spirit‐based distillers' grains was used to reduce and roast red mud (RM) to prepare magnetic adsorption material (MRM), aiming to improve the adsorption performance of RM on low‐concentration phospho ...
DOI:
10.1002/jctb.7137

60. Adsorption potentials of iron-based metal–organic framework for methyl orange removal: batch and fixed-bed column studies

Author:
A. Karami; R. Sabouni; M. H. Al-Sayah; A. Aidan
Source:
International journal of environmental science and technology 2021 v.18 no.11 pp. 3597-3612
ISSN:
1735-1472
Subject:
adsorbents; adsorption; coordination polymers; dose response; environmental science; equations; mass transfer; methyl orange; models; pH; sorption isotherms; technology; temperature
Abstract:
... In the present work, continuous fixed-bed column and batch studies were undertaken to investigate the efficiency of iron-based metal–organic framework (Fe-BTC) for the removal of methyl orange as a model contaminant from aqueous solutions. The batch experiments were carried out by varying operational parameters such as adsorbent dosage, pH, temperature, and initial contaminant concentration. The r ...
DOI:
10.1007/s13762-020-03103-2

61. Adsorption properties of magnetic carbon nanotubes for patulin removal from aqueous solution systems

Author:
Zhuo Zhang; Chen Zeng; Bangzhu Peng
Source:
Food control 2019 v.102 pp. 1-10
ISSN:
0956-7135
Subject:
Aspergillus; Paecilomyces; Penicillium expansum; absorbents; activation energy; adsorbents; adsorption; aqueous solutions; carbon nanotubes; environmental health; equations; fungi; heat production; magnetism; models; pH; patulin; sodium hydroxide; sorption isotherms; temperature
Abstract:
... Patulin (PAT) is a type of mycotoxin produced by the P. expansum, Aspergillus, Penicillium, and Paecilomyces fungal species and constitutes serious food-related and environmental health threats to consumers. In this study, a novel magnetic multi-walled carbon nanotube (MWCNT) adsorbent was successfully synthesized, and its adsorption properties for the efficient removal of PAT from aqueous solutio ...
DOI:
10.1016/j.foodcont.2019.02.038

62. Adsorptive Removal and Recovery of U(VI), Cu(II), Zn(II), and Co(II) from Water and Industry Effluents

Author:
T. S. Anirudhan; P. G. Radhakrishnan
Source:
Bioremediation journal 2011 v.15 no.1 pp. 39-56
ISSN:
1547-6529
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; aqueous solutions; batch systems; bioremediation; cations; cobalt; copper; cross-linking reagents; desorption; effluents; equations; heavy metals; hydrochloric acid; ionic strength; lignocellulose; metal ions; models; pH; potassium; sodium chloride; tamarinds; thiosulfates; uranium; wastewater; zinc
Abstract:
... Tamarind fruit shell (TFS) was converted to a cation exchanger (PGTFS-SP-COOH) having a carboxylate functional group at the chain end by grafting poly(hydroxyethylmethacrylate) onto TFS (a lignocellulosic residue) using potassium peroxydisulfate-sodium thiosulfate redox initiator, and in the presence of N, N ′-methylenebisacrylamide as a cross-linking agent, followed by functionalization. The chem ...
DOI:
10.1080/10889868.2010.548001

63. Adsorptive Removal of Arsenic and Mercury from Aqueous Solutions by Eucalyptus Leaves

Author:
Mahmood Alimohammadi; Zhyar Saeedi; Bahman Akbarpour; Hassan Rasoulzadeh; Kaan Yetilmezsoy; Mohammad A. Al-Ghouti; Majeda Khraisheh; Gordon McKay
Source:
Water, air, and soil pollution 2017 v.228 no.11 pp. 429
ISSN:
0049-6979
Subject:
Eucalyptus; adsorbents; adsorption; aqueous solutions; arsenic; equations; heavy metals; kinetics; leaves; mercury; models; pH; response surface methodology; sorption isotherms
Abstract:
... The study is a first-time investigation into the use of Eucalyptus leaves as a low-cost herbal adsorbent for the removal of arsenic (As) and mercury (Hg) from aqueous solutions. The adsorption capacity and efficiency were studied under various operating conditions within the framework of response surface methodology (RSM) by implementing a four-factor, five-level Box–Wilson central composite desig ...
DOI:
10.1007/s11270-017-3607-y

64. Adsorptive Removal of Fluoroquinolones from Water by Pectin-Functionalized Magnetic Nanoparticles: Process Optimization Using a Spectrofluorimetric Assay

Author:
Attallah Olivia A.; Al-Ghobashy Medhat A.; Nebsen Marianne; Salem Maissa Y.
Source:
ACS sustainable chemistry 2017 v.5 no.1 pp. 133-145
ISSN:
2168-0485
Subject:
adsorbents; adsorption; aqueous solutions; chemical elements; ciprofloxacin; drugs; equations; experimental design; kinetics; magnetite; models; monitoring; moxifloxacin; nanoparticles; pH; pectins; photosensitivity; silica; working conditions
Abstract:
... The efficiency of adsorption of two photosensitive fluoroquinolones; Ciprofloxacin (CIP) and Moxifloxacin (MOX), on the surface of synthesized magnetite/pectin nanoparticles (MPNPs) and magnetite/silica/pectin nanoparticles (MSPNPs) was studied from aqueous solution under varying experimental conditions. A validated spectrofluorimetric assay was developed for monitoring of CIP and MOX intact drugs ...
DOI:
10.1021/acssuschemeng.6b01003

65. Adsorptive Removal of Malachite Green Dye Using Durian Seed-Based Activated Carbon

Author:
Mohd Azmier Ahmad; Norhidayah Ahmad; Olugbenga Solomon Bello
Source:
Water, air, and soil pollution 2014 v.225 no.8 pp. 2057
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; activated carbon; adsorption; aqueous solutions; durians; equations; malachite green; models; pH; proximate composition; scanning electron microscopes; sorption isotherms; temperature; wastewater
Abstract:
... Chemically prepared activated carbon derived from durian seed (DSAC) was used as adsorbent to adsorb Malachite green (MG) dye. The prepared DSAC was characterized using Brunauer–Emmet–Teller (BET), Fourier transform infrared (FTIR), scanning electron microscope (SEM), and proximate analysis, respectively. Batch adsorption studies were carried out for the removal of MG dye from aqueous solutions by ...
DOI:
10.1007/s11270-014-2057-z

66. Adsorptive Removal of Methyl Orange and Methylene Blue from Aqueous Solution with Finger-Citron-Residue-Based Activated Carbon

Author:
Gong Rui; Ye Jingjing; Dai Wei; Yan Xiaoyang; Hu Jue; Hu Xin; Li Shuang; Huang He
Source:
Industrial & Engineering Chemistry Research 2013 v.52 no.39 pp. 14297-14303
ISSN:
1520-5045
Subject:
Citrus medica; activated carbon; adsorbents; adsorption; aqueous solutions; endothermy; engineering; entropy; equations; kinetics; methyl orange; methylene blue; models; pH; temperature; wastewater; water pollution
Abstract:
... Activated carbon derived from finger citron residue (FAC) was tested as a new type of adsorbent for the removal of harmful dyes, namely, the anionic dye methyl orange (MO) and the cationic dye methylene blue (MB), from contaminated water. Liquid-phase adsorption experiments were conducted, and the maximum adsorption capacity was determined. Various conditions were evaluated, including initial dye ...
DOI:
10.1021/ie402138w

67. Adsorptive characteristics of modified talcum powder in removing methylene blue from wastewater

Author:
Liu Wenlei; Zhao Shanlin; Cui Shuang; Zhang Jinhui; Li Ping; Yang Shuangchun
Source:
Chemical speciation and bioavailability 2014 v.26 no.3 pp. 167-175
ISSN:
0954-2299
Subject:
adsorbents; adsorption; equations; methylene blue; models; nitric acid; pH; talc; temperature; textile mill effluents; wastewater
Abstract:
... Modified talcum powder prepared by physical purification and 50% (w/w) HNO₃ acid activation was characterised by X-ray diffraction, scanning electron microscopy and energy dispersive spectrometry. The modified talcum powder was used for the methylene blue adsorption in wastewater. Adsorption contact time, pH, adsorption temperature, initial mass concentration, and solid content were investigated. ...
DOI:
10.3184/095422914X14047538761323

68. Adsorptive removal of an acid dye by lignocellulosic waste biomass activated carbon: Equilibrium and kinetic studies

Author:
S. Nethaji; A. Sivasamy
Source:
Chemosphere 2011 v.82 no.10 pp. 1367-1372
ISSN:
0045-6535
Subject:
activated carbon; adsorption; aqueous solutions; biomass; dyes; equations; flowers; lignocellulosic wastes; models; pH; particle size; temperature
Abstract:
... Chemically prepared activated carbon material derived from palm flower was used as adsorbent for removal of Amido Black dye in aqueous solution. Batch adsorption studies were performed for the removal of Amido Black 10B (AB10B), a di-azo acid dye from aqueous solutions by varying the parameters like initial solution pH, adsorbent dosage, initial dye concentration and temperature with three differe ...
DOI:
10.1016/j.chemosphere.2010.11.080
PubMed:
21176940

69. Adsorptive removal of anionic dyes by graphene impregnated with MnO2 from aqueous solution

Author:
Mohammed Yusuf; Kang Song; Shixian Geng; Xie Fazhi
Source:
Colloids and surfaces 2020 v.595 no. pp. 124667
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; dyes; equations; graphene; ions; kinetics; manganese dioxide; microwave treatment; models; pH; scanning electron microscopes; scanning electron microscopy; sorption isotherms; temperature; thermodynamics
Abstract:
... Graphene nanosheet-manganese dioxide (GN-MnO₂) composite was synthesized by a microwave-assisted method. The physico-chemical properties of modified graphene (GN) were characterized by different techniques, such as scanning electron microscopes (SEM), Fourier-transform infrared spectrometers (FTIR), X-ray diffraction (XRD) and Raman spectroscopy. The effects of contact time, pH, concentration, tem ...
DOI:
10.1016/j.colsurfa.2020.124667

70. Adsorptive removal of ciprofloxacin and isoniazid from aqueous solution

Author:
Cyril Dube; Roman Tandlich; Brendan Wilhelmi
Source:
Nova biotechnologica et chimica 2018 v.17 no.1 pp. 16-28
ISSN:
1338-6905
Subject:
adsorbents; adsorption; antibiotic resistance; antibiotics; aqueous solutions; bacteria; ciprofloxacin; coal fly ash; electrostatic interactions; equations; heat; isoniazid; kaolinite; liquids; models; pH; perlite; sorption isotherms; talc; vermiculite
Abstract:
... This paper describes study of ciprofloxacin and isoniazid removal from aqueous solutions using coal fly ash (FA), kaolinite, perlite, talc and vermiculite. The adsorptive features of the adsorbents were evaluated for ciprofloxacin and isoniazid with regards to the effects of contact time, pH, the solid/liquid ratio and antibiotic concentration. All adsorbents were sterilised by dry heat before use ...
DOI:
10.2478/nbec-2018-0002

71. Adsorptive removal of heavy metal ions from industrial effluents using activated carbon derived from waste coconut buttons

Author:
T.S. Anirudhan; S.S. Sreekumari
Source:
Journal of environmental sciences (China) 2011 v.23 no.12 pp. 1989-1998
ISSN:
1001-0742
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; activated carbon; adsorbents; adsorption; coconuts; copper; equations; heavy metals; industrial effluents; lead; mercury; metal ions; models; pH; scanning electron microscopy; sorption isotherms; surface area; thermal analysis; China
Abstract:
... Activated carbon (AC) derived from waste coconut buttons (CB) was investigated as a suitable adsorbent for the removal of heavy metal ions such as Pb(II), Hg(II) and Cu(II) from industrial effluents through batch adsorption process. The AC was characterized by elemental analysis, fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, thermal gravimetric and diffe ...
DOI:
10.1016/S1001-0742(10)60515-3

72. Adsorptive removal of lanthanum based on hydrothermally synthesized iron oxide-titanium oxide nanoparticles

Author:
Ekram Y. Danish; Hadi M. Marwani; Kholoud F. Almoslehi; Esraa M. Bakhsh
Source:
Environmental science and pollution research international 2020 v.27 no.5 pp. 5408-5417
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; data collection; energy-dispersive X-ray analysis; equations; hot water treatment; ions; iron oxides; lanthanum; models; nanoparticles; pH; scanning electron microscopy; sorption isotherms; thermodynamics; titanium dioxide
Abstract:
... Iron oxide-titanium oxide (Fe₂O₃-TiO₂) nanoparticles were developed as an effective adsorbent in order to extract and remove lanthanum ions selectively from aqueous media. Fe₂O₃-TiO₂ nanoparticles were prepared by simple hydrothermal method and structurally characterized using FESEM, EDS, XRD, FTIR, and BET techniques. The analytical potential of Fe₂O₃-TiO₂ nanoparticles was interpreted by applyin ...
DOI:
10.1007/s11356-019-07072-z

73. Advanced low carbon-to-nitrogen ratio wastewater treatment by electrochemical and biological coupling process

Author:
Shihai Deng; Desheng Li; Xue Yang; Shanbin Zhu; Wei Xing
Source:
Environmental science and pollution research 2016 v.23 no.6 pp. 5361-5373
ISSN:
0944-1344
Subject:
ammonia; ammonium nitrogen; biofilm; carbon; carbon nitrogen ratio; denitrification; dissolved oxygen; electrochemistry; equations; iron; models; nitrates; nitrogen; pH; pollution; sludge; surface water; wastewater; wastewater treatment
Abstract:
... Nitrogen pollution in ground and surface water significantly affects the environment and its organisms, thereby leading to an increasingly serious environmental problem. Such pollution is difficult to degrade because of the lack of carbon sources. Therefore, an electrochemical and biological coupling process (EBCP) was developed with a composite catalytic biological carrier (CCBC) and applied in a ...
DOI:
10.1007/s11356-015-5711-0

74. Alkali-Activated Boiler Fly Ash for Ni(II) Removal: Characterization and Parametric Study

Author:
Muhammad Samiullah; Zaheer Aslam; Adeem Ghaffar Rana; Aamir Abbas; Waqar Ahmad
Source:
Water, air, and soil pollution 2018 v.229 no.4 pp. 113
ISSN:
0049-6979
Subject:
X-ray diffraction; adsorbents; adsorption; endothermy; enthalpy; equations; fly ash; heavy metals; models; nickel; pH; porosity; scanning electron microscopy; sorption isotherms; thermal properties; wastes
Abstract:
... In this study, the adsorption behavior of waste boiler fly ash has been explored for purification of nickel heavy metal ion bearing water. The raw boiler fly ash (RBFA) was alkali modified to improve the adsorption characteristics. The modified boiler fly ash (MBFA) was characterized using the SEM, XRF, XRD, BET, and TGA analyzers to confirm the improved textural, mineralogical, porosity and therm ...
DOI:
10.1007/s11270-018-3758-5

75. Amidic succinic acid moiety anchored silica gel for the extraction of UO22+ from aqueous medium and simulated sea water

Author:
P. Amesh; A.S. Suneesh; B. Robert Selvan; K.A. Venkatesan
Source:
Colloids and surfaces 2019 v.578 pp. 123585
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; energy-dispersive X-ray analysis; equations; ions; models; moieties; pH; scanning electron microscopy; seawater; silica gel; succinic acid; thermogravimetry; titration; uranium
Abstract:
... A solid phase adsorbent containing amidic carboxylic acid functional group on the surface of the silica gel was prepared by organo-surface modification reactions and characterized the product, Si-SUC, by FT-IR, Raman, thermogravimetry, X-ray diffraction, SEM-EDX and pH titration techniques. The extraction behaviour of U(VI) from aqueous solution was studied as a function of various parameters such ...
DOI:
10.1016/j.colsurfa.2019.123585

76. Amidoxime Modified Polymers of Intrinsic Microporosity (PIM-1); A Versatile Adsorbent for Efficient Removal of Charged Dyes; Equilibrium, Kinetic and Thermodynamic Studies

Author:
Bekir Satilmis
Source:
Journal of polymers and the environment 2020 v.28 no.3 pp. 995-1009
ISSN:
1566-2543
Subject:
adsorbents; adsorption; data collection; equations; heat production; kinetics; methyl orange; methylene blue; models; pH; pollutants; polymers; temperature
Abstract:
... Polymers of Intrinsic Microporosity (PIMs) are recognized as promising polymers for active separation of organic pollutants. These highly porous and solution-processable polymers could be tailored to remove specific targets from an aqueous system. In this study, PIM-1 powder was modified to amidoxime PIM-1 powder and adsorption of charged dyes which are Methylene Blue (MB, cationic) and Methyl Ora ...
DOI:
10.1007/s10924-020-01664-4

77. Ammonia Volatilization from Flooded Soil Systems: A Computer Model. I. Theoretical Aspects

Author:
G. R. Jayaweera; D. S. Mikkelsen
Source:
Soil Science Society of America journal 1990 v.54 no.5 pp. 1447-1455
ISSN:
0361-5995
Subject:
Oryza sativa; ammonia; ammonium; ammonium nitrogen; computer simulation; dissociation; equations; fertilizer application; gases; liquid-air interface; mass transfer; models; pH; rice; soil; temperature; volatilization; wind speed
Abstract:
... Ammonia volatilization from flooded rice (Oryza sativa L.) is a major mechanism for N loss and poor fertilizer use efficiency. Ammonia volatilization is influenced by five primary factors: NH₄-N concentration, pH, temperature, depth of floodwater, and wind speed. This NH₃-volatilization model is based on chemical and volatilization aspects. The chemical aspects of the model deal with the NH₄/NH₃(a ...
DOI:
10.2136/sssaj1990.03615995005400050039x

78. Analysis of Acid Alizarin Violet N Dye Removal Using Sugarcane Bagasse as Adsorbent

Author:
Eduardo Kovalski Mitter; Graziely Cristina dos Santos; Érica Janaína Rodrigues de Almeida; Luana Galvão Morão; Heide Dayane Prates Rodrigues; Carlos Renato Corso
Source:
Water, air, and soil pollution 2012 v.223 no.2 pp. 765-770
ISSN:
0049-6979
Subject:
adsorption; dyes; effluents; equations; fabrics; models; nitrogen content; pH; sugarcane bagasse; textile industry; water pollution
Abstract:
... With the development of the textile industry, there has been a demand for dye removal from contaminated effluents. In recent years, attention has been directed toward various natural solid materials that are capable of removing pollutants from contaminated water at low cost. One such material is sugarcane bagasse. The aim of the present study was to evaluate adsorption of the dye Acid Violet Aliza ...
DOI:
10.1007/s11270-011-0900-z

79. Analytical model for BTEX natural attenuation in the presence of fuel ethanol and its anaerobic metabolite acetate

Author:
Marcio L.B. da Silva; Diego E. Gomez; Pedro J.J. Alvarez
Source:
Journal of contaminant hydrology 2013 v.146 pp. 1-7
ISSN:
0169-7722
Subject:
BTEX (benzene, toluene, ethylbenzene, xylene); acetates; biodegradation; equations; ethanol; ethanol fuels; groundwater; methane; methane production; models; pH; solubility; volatile fatty acids
Abstract:
... Flow-through column studies were conducted to mimic the natural attenuation of ethanol and BTEX mixtures, and to consider potential inhibitory effects of ethanol and its anaerobic metabolite acetate on BTEX biodegradation. Results were analyzed using a one-dimensional analytical model that was developed using consecutive reaction differential equations based on first-order kinetics. Decrease in pH ...
DOI:
10.1016/j.jconhyd.2012.12.006
PubMed:
23340452

80. Analyzing chromatographic data using multilevel modeling

Author:
Paweł Wiczling
Source:
Analytical and bioanalytical chemistry 2018 v.410 no.16 pp. 3905-3915
ISSN:
1618-2642
Subject:
Bayesian theory; Markov chain; Monte Carlo method; acids; chemical bases; chromatography; covariance; dissociation; equations; hydrophobicity; mass spectrometry; methanol; models; pH; quantitative structure-activity relationships; surface area
Abstract:
... It is relatively easy to collect chromatographic measurements for a large number of analytes, especially with gradient chromatographic methods coupled with mass spectrometry detection. Such data often have a hierarchical or clustered structure. For example, analytes with similar hydrophobicity and dissociation constant tend to be more alike in their retention than a randomly chosen set of analytes ...
DOI:
10.1007/s00216-018-1061-3

81. Antifungal Activity Evaluation of Mexican Oregano (Lippia berlandieri Schauer) Essential Oil on the Growth of Aspergillus flavus by Gaseous Contact

Author:
Aida Gomez-Sanchez; Enrique Palou; Aurelio Lopez-Malo
Source:
Journal of food protection 2011 v.74 no.12 pp. 2192-2198
ISSN:
0362-028X
Subject:
Aspergillus flavus; Lippia graveolens; agar; air; antifungal properties; equations; essential oils; food spoilage; fungicides; germination; growth curves; logit analysis; models; pH; temperature; water activity
Abstract:
... The antifungal activity of Mexican oregano (Lippia berlandieri Schauer) essential oil by gaseous contact on the growth of Aspergillus flavus at selected essential oil concentrations (14.7, 29.4, 58.8, or 117.6 μl of essential oil per liter of air) and temperatures (25, 30, or 35°C) was evaluated in potato dextrose agar formulated at water activity of 0.98 and pH 4.0. Mold growth curves were adequa ...
DOI:
10.4315/0362-028X.JFP-11-308

82. Application of Box–Behnken factorial design for parameters optimization of basic dye removal using nano-hematite photo-Fenton tool

Author:
Aghareed M. Tayeb; Maha A. Tony; Shehab A. Mansour
Source:
Applied water science 2018 v.8 no.5 pp. 138
ISSN:
2190-5487
Subject:
cost effectiveness; equations; experimental design; hydrogen peroxide; iron; methylene blue; model validation; models; oxidation; pH; pollutants; pollution load; remediation; response surface methodology; textile industry; wastewater
Abstract:
... A huge amount of water is consumed in the textile industry, and the result is the production of a large amount of wastewater. The treatment of such wastewater significantly reduces the pollution load. Oxidation by nano-Fenton reactions (Fe³⁺/H₂O₂) is a reasonable and cost-efficient process for the remediation of harmful pollutants in wastewater. In the present study, nano-hematite was applied as a ...
DOI:
10.1007/s13201-018-0783-x

83. Application of Cr-doped ZnO for photocatalytic degradation of organic pollutants from aqueous solutions

Author:
A. Sharifi; A. R. Abhari; S. Farrokhzadeh; Z. Mahmoodi; N. Sadeghi
Source:
International journal of environmental science and technology 2022 v.19 no.3 pp. 1507-1518
ISSN:
1735-1472
Subject:
X-ray diffraction; chlorine; combustion; disinfectants; energy; enthalpy; entropy; equations; fulvic acids; human health; humic acids; microwave treatment; models; pH; photocatalysis; photolysis; pollutants; reflectance spectroscopy; sorption isotherms; water treatment
Abstract:
... During the water treatment process, some by-products could be produced by combining the disinfectant with the organic compounds. For example, chlorine can effectively convert humic acid derivatives to trihalomethane. Trihalomethanes are important organohalogen compounds with a hazardous effect on human health. In the present research, Cr-doped ZnO nano-photocatalyst was synthesized using a microwa ...
DOI:
10.1007/s13762-021-03290-6

84. Application of Cu fertilizer on Cu recovery and desorption kinetics in two calcareous soils

Author:
L. Sadegh Kasmaei; M. Fekri
Source:
Environmental earth sciences 2012 v.67 no.7 pp. 2121-2127
ISSN:
1866-6280
Subject:
EDTA (chelating agent); calcareous soils; copper; copper fertilizers; copper sulfate; desorption; equations; fertilizer rates; field capacity; greenhouses; models; pH; Iran
Abstract:
... Desorption of copper (Cu) is an important factor in determining Cu availability in calcareous soils. The aims of this investigation was to study the influences of application of Cu fertilizer on copper desorption and recovery of two calcareous soils of Iran and determine the best models for description of the kinetics of Cu release in these soils. For this purpose, copper sulfate (CuSO₄·5H₂O) fert ...
DOI:
10.1007/s12665-012-1652-9

85. Application of Unsteady‐State Heat Transfer Equations to Thermal Process of Morcela de arroz from Monchique Region, a Portuguese Traditional Blood Sausage

Author:
J.A. Pereira; S. Ferreira‐Dias; L. Dionísio; L. Patarata; T.J.S. Matos
Source:
Journal of food processing and preservation 2017 v.41 no.2 pp. -
ISSN:
0145-8892
Subject:
Bacillus cereus; Clostridium perfringens; blood; commercialization; cooking; durability; equations; food safety; heat transfer; heat treatment; internal temperature; models; monitoring; pH; preservatives; processed foods; rice; sausages; shelf life; water activity; Portugal
Abstract:
... Morcela de Arroz (MA) is a popular cooked blood and rice sausage produced following empirical procedures in the Monchique region, south of Portugal. Presenting high pH (about 6.5) and water activity (around 0.97), it is commercialized without preservatives, unpacked and with restricted commercialization period (1 week at 0C–5C). The aim of this study was (i) to assess the adequacy of unsteady‐stat ...
DOI:
10.1111/jfpp.12870

86. Application of a new generation of complexing agents in removal of heavy metal ions from different wastes

Author:
Dorota Kołodyńska
Source:
Environmental science and pollution research international 2013 v.20 no.9 pp. 5939-5949
ISSN:
0944-1344
Subject:
EDTA (chelating agent); agrochemicals; biodegradability; chelating agents; cosmetics; equations; fertilizers; foods; industry; metal ions; models; pH; sorption; temperature; trace elements; wastes; water treatment
Abstract:
... Complexing agents are extensively applied in many fields of industry. They are used to provide effective controlling trace metal ions in cleaning industries, textile, pulp and paper production, water treatment, agriculture, food industries, etc. Recently, the low biodegradability of these ligands and their accumulation in the environment has become a cause for concern. Therefore, replacement of et ...
DOI:
10.1007/s11356-013-1576-2
PubMed:
23463276
PubMed Central:
PMC3720993

87. Application of activated carbon derived from ‘waste’ bamboo culms for the adsorption of azo disperse dye: Kinetic, equilibrium and thermodynamic studies

Author:
Lianggui Wang
Source:
Journal of environmental management 2012 v.102 no. pp. 79-87
ISSN:
0301-4797
Subject:
activated carbon; adsorbents; adsorption; aqueous solutions; azo dyes; bacterial artificial chromosomes; bamboos; equations; models; pH; statistical analysis; temperature; waste utilization; wastes
Abstract:
... The utilization of activated carbon derived from ‘waste’ bamboo culms (BAC) for the removal of Disperse Red 167 (DR167), an azo disperse dye, was investigated. Studies of the properties of the adsorbent, the effect of contact time, the initial pH of the solution, the initial concentration of the dye solution and temperature indicated that a low initial pH or concentration of dye solution favors th ...
DOI:
10.1016/j.jenvman.2012.02.019
PubMed:
22446135

88. Application of bifunctional magnetic adsorbent to adsorb metal cations and anionic dyes in aqueous solution

Author:
Ya-Fen Lin; Hua-Wei Chen; Poh-Sun Chien; Chyow-San Chiou; Cheng-Chung Liu
Source:
Journal of hazardous materials 2011 v.185 no.2-3 pp. 1124-1130
ISSN:
0304-3894
Subject:
activation energy; adsorbents; adsorption; aqueous solutions; cations; copper; dyes; equations; magnetite; models; nitric acid; pH; silica; sodium hydroxide; sorption isotherms
Abstract:
... A magnetic adsorbent, amine-functionalized silica magnetite (NH₂/SiO₂/Fe₃O₄), has been synthesized to behave as an anionic or cationic adsorbent by adjusting the pH value of the aqueous solution to make amino groups protonic or neutral. NH₂/SiO₂/Fe₃O₄ were used to adsorb copper ions (metal cation) and Reactive Black 5 (RB5, anionic dye) in an aqueous solution in a batch system, and the maximum ads ...
DOI:
10.1016/j.jhazmat.2010.10.022

89. Application of chitosan/poly(vinyl alcohol)/CuO (CS/PVA/CuO) beads as an adsorbent material for the removal of Pb(II) from aqueous environment

Author:
Xu Jiao; Yuvaraja Gutha; Weijiang Zhang
Source:
Colloids and surfaces 2017 v.149 pp. 184-195
ISSN:
0927-7765
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; chitosan; colloids; cupric oxide; energy-dispersive X-ray analysis; enthalpy; entropy; equations; kinetics; lead; models; nanoparticles; pH; polyvinyl alcohol; scanning electron microscopy; sorption isotherms; temperature; transmission electron microscopy
Abstract:
... The utilization of CS/PVA/CuO as a novel adsorbent for the removal of Pb(II) from aqueous solution has been examined in a batch adsorption process with several experimental conditions including initial solution pH, dose, contact time, initial metal ion concentration, and temperature. The new and novel material was characterized by structural (XRD), spectral (FTIR), morphological with elemental (SE ...
DOI:
10.1016/j.colsurfb.2016.10.024

90. Application of dithiocarbamate-modified starch for dyes removal from aqueous solutions

Author:
Rumei Cheng; Bo Xiang; Yijiu Li; Mingzhen Zhang
Source:
Journal of hazardous materials 2011 v.188 no.1-3 pp. 254-260
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; activated carbon; adsorption; aqueous solutions; dyes; electrostatic interactions; energy; enthalpy; equations; heat production; models; molecular weight; pH; sodium sulfate; starch; thermogravimetry
Abstract:
... The present study shows that the dithiocarbamate-modified starch (DTCS) is a commercially promising sorbent for the removal of anionic dyes from aqueous solutions. It is more effective than activated carbon for this purpose. At the appropriate solution pH of 4, kinetic studies indicate that the sorption of the dyes tends to follow pseudo-first-order equation. The sorption equilibrium is best descr ...
DOI:
10.1016/j.jhazmat.2011.01.104

91. Application of experimental design and derivative spectrophotometry methods in optimization and analysis of biosorption of binary mixtures of basic dyes from aqueous solutions

Author:
Arash Asfaram; Mehrorang Ghaedi; Gholam Reza Ghezelbash; Francesco Pepe
Source:
Ecotoxicology and environmental safety 2017 v.139 pp. 219-227
ISSN:
0147-6513
Subject:
Fourier transform infrared spectroscopy; Yarrowia lipolytica; aqueous solutions; biosorbents; biosorption; correlation; equations; experimental design; gentian violet; kinetics; malachite green; mixing; models; pH; prediction; response surface methodology; scanning electron microscopy; sorption isotherms; system optimization; temperature; thermodynamics
Abstract:
... Simultaneous biosorption of malachite green (MG) and crystal violet (CV) on biosorbent Yarrowia lipolytica ISF7 was studied. An appropriate derivative spectrophotometry technique was used to evaluate the concentration of each dye in binary solutions, despite significant interferences in visible light absorbances. The effects of pH, temperature, growth time, initial MG and CV concentration in batch ...
DOI:
10.1016/j.ecoenv.2017.01.043

92. Application of experimental design methodology to optimize antibiotics removal by walnut shell based activated carbon

Author:
S. Teixeira; C. Delerue-Matos; L. Santos
Source:
Science of the total environment 2019 v.646 pp. 168-176
ISSN:
0048-9697
Subject:
activated carbon; adsorption; antibiotics; equations; experimental design; metronidazole; models; pH; response surface methodology; sorption isotherms; sulfamethoxazole; temperature; walnut hulls
Abstract:
... Three-level Box-Behnken experimental design with three factors (pH, temperature and antibiotic initial concentration) combined with response surface methodology (RSM) was applied to study the removal of Metronidazole and Sulfamethoxazole by walnut shell based activated carbon. This methodology enabled to identify the effects of the different factors studied and their interactions in the response o ...
DOI:
10.1016/j.scitotenv.2018.07.204

93. Application of magnetic particles modified with amino groups to adsorb copper ions in aqueous solution

Author:
Yafen Lin; Huawei Chen; Kaelong Lin; Boryann Chen; Chyowsan Chiou
Source:
Journal of environmental sciences (China) 2011 v.23 no.1 pp. 44-50
ISSN:
1001-0742
Subject:
activation energy; adsorbents; adsorption; aqueous solutions; batch systems; copper; equations; magnetite; models; nitric acid; pH; silica; sorption isotherms
Abstract:
... A magnetic adsorbent can be easily recovered from treated water by magnetic force, without requiring further downstream treatment. In this research, amine-functionalized silica magnetite has been synthesized using N-[3-(trimethoxysilyl)propyl]-ethylenediamine (TPED) as a surface modification agent. The synthesized magnetic amine adsorbents were used to adsorb copper ions in an aqueous solution in ...
DOI:
10.1016/S1001-0742(10)60371-3

94. Application of manganese nodules leaching residue for adsorption of nickel(II) ions from aqueous solution

Author:
N. S. Randhawa; D. Dwivedi; S. Prajapati; R. K. Jana
Source:
International journal of environmental science and technology 2015 v.12 no.3 pp. 857-864
ISSN:
1735-1472
Subject:
activation energy; adsorbents; adsorption; aqueous solutions; cobalt; copper; desorption; equations; industrial effluents; ions; leaching; manganese; models; nickel; pH; remediation; sorption isotherms; temperature
Abstract:
... Deep ocean manganese nodules are significant futuristic resource of copper, nickel and cobalt. After recovery of these valuable metals, a huge quantity of residue (~70 % of ore body) is generated. In the present paper, investigations carried out for the application of washed manganese nodule leaching residue (wMNR) for the removal of nickel (Ni) ions from aqueous solution by adsorption are describ ...
DOI:
10.1007/s13762-013-0460-4

95. Application of response surface methodology for the optimization of the production of electro-activated solutions in a three-cell reactor

Author:
Viacheslav Liato; Steve Labrie; Marzouk Benali; Mohammed Aider
Source:
Engineering in agriculture, environment and food 2015 v.8 no.4 pp. 264-272
ISSN:
1881-8366
Subject:
electrolytes; engineering; equations; exposure duration; models; pH; prediction; redox potential; response surface methodology; salt concentration
Abstract:
... This study examines the possibility of producing optimally electro-activated (EA) solutions using response surface methodology (RSM). RSM yielded models to predict solution properties as functions of the process parameters studied with very high coefficients of determination (R2 = 0.9393–0.9974), indicating the models provided high correlation between observed and predicted values. The effect of p ...
DOI:
10.1016/j.eaef.2015.03.003

96. Application of visible/near‐infrared reflectance spectroscopy for predicting internal and external quality in pepper

Author:
Eva María Toledo‐Martín; María Carmen García‐García; Rafael Font; José Manuel Moreno‐Rojas; Pedro Gómez; María Salinas‐Navarro; Mercedes Del Río‐Celestino
Source:
Journal of the science of food and agriculture 2016 v.96 no.9 pp. 3114-3125
ISSN:
0022-5142
Subject:
ascorbic acid; breeding; brix; carotenes; cellulose; chlorophyll; color; equations; firmness; freeze drying; fruit quality; least squares; lipids; lutein; malic acid; models; pH; pepper; peppers; pericarp; phenolic compounds; prediction; reflectance spectroscopy; screening; spectrometers; spectrophotometers
Abstract:
... BACKGROUND: The characterization of internal (°Brix, pH, malic acid, total phenolic compounds, ascorbic acid and total carotenoid content) and external (color, firmness and pericarp wall thickness) pepper quality is necessary to better understand its possible applications and increase consumer awareness of its benefits. The main aim of this work was to examine the feasibility of using visible/near ...
DOI:
10.1002/jsfa.7488

97. Application of vulnerability modeling techniques in groundwater resources management: a comparative study

Author:
Kehinde Anthony Mogaji
Source:
Applied water science 2018 v.8 no.5 pp. 127
ISSN:
2190-5487
Subject:
algorithms; anthropogenic activities; equations; geographic information systems; groundwater; managers; manganese; models; pH; pollution; prediction; regression analysis; water quality; Malaysia
Abstract:
... The sustainability management of groundwater resource globally is challenged by its vulnerability to pollution resulting from anthropogenic activities. In order to address this problem, the DRASTIC index model (DIM) method among the existing vulnerability modeling techniques is commonly used. OWA-DRASTIC index model (ODIM) technique is another recently developed method for the same task. This stud ...
DOI:
10.1007/s13201-018-0770-2

98. Applications of Fe3O4@AC nanoparticles for dye removal from simulated wastewater

Author:
Seema Joshi; V.K. Garg; Navish Kataria; K. Kadirvelu
Source:
Chemosphere 2019 v.236 pp. 124280
ISSN:
0045-6535
Subject:
activated carbon; adsorption; coprecipitation; equations; iron oxides; methylene blue; models; nanoparticles; pH; sorption isotherms; surface area; temperature; wastewater
Abstract:
... This study deals with the removal of cationic dyes from the simulated wastewater using Fe₃O₄ nanoparticles loaded activated carbon. Fe₃O₄@AC nanoparticles were synthesised using co-precipitation methods. The Fe₃O₄@AC nanoparticles (nps) were characterised using different techniques and data revealed that the synthesised nanoparticles were 6–16 nm in diameter. pHpzc of Fe₃O₄@AC nanoparticles was 7. ...
DOI:
10.1016/j.chemosphere.2019.07.011

99. Applying Activated Carbon Derived from Coconut Shell Loaded by Silver Nanoparticles to Remove Methylene Blue in Aqueous Solution

Author:
Huu Tap Van; Thi Minh Phuong Nguyen; Vu Thi Thao; Xuan Hoa Vu; Tien Vinh Nguyen; Lan Huong Nguyen
Source:
Water, air, and soil pollution 2018 v.229 no.12 pp. 393
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; activated carbon; adsorbents; adsorption; aqueous solutions; coatings; coconuts; energy-dispersive X-ray analysis; equations; kinetics; methylene blue; models; nanosilver; pH; scanning electron microscopy
Abstract:
... This study developed a new adsorbent, specifically activated carbon-loaded silver nanoparticles (AgNPs-AC) by coating the silver nanoparticles (AgNPs) onto activated carbon (AC). The obtained AgNPs-AC were characterized by scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), Fourier transform infrared spectroscopy (FTIR), and Brunauer-Emmett-Teller (BET). The ability of AgNPs- ...
DOI:
10.1007/s11270-018-4043-3

100. Arsenate–Ferrihydrite Systems from Minutes to Months: A Macroscopic and IR Spectroscopic Study of an Elusive Equilibrium

Author:
Swedlund Peter J.; Holtkamp Hannah; Song Yantao; Daughney Christopher J.
Source:
Environmental Science & Technology 2014 v.48 no.5 pp. 2759-2765
ISSN:
1520-5851
Subject:
arsenic; equations; ferrihydrite; models; pH; sorption; spectral analysis
Abstract:
... Sorption by ferrihydrite is an important control on As(V) concentrations in many oxic aquatic systems. There are significant discrepancies in reported sorption constants (log(KAₛ)), which presents a problem for quantifying and understanding this important system. A review of reported ferrihydrite–As(V) sorption studies indicated a positive correlation between reaction time used in the experiments ...
DOI:
10.1021/es404742c