Moran-Salazar, Rene G. and Carbajal-Arizaga, Gregorio G. and Gutierrez-Ortega, Jose A. and Badillo-Camacho, Jessica and Manriquez-Gonzalez, Ricardo and Shenderovich, Ilya G. and Gomez-Salazar, Sergio (2023) As(V) removal from aqueous media using an environmentally friendly zwitterion L-cysteine functionalized silica adsorbent. CHEMICAL ENGINEERING SCIENCE, 278: 118879. ISSN 0009-2509, 1873-4405
Full text not available from this repository. (Request a copy)Abstract
An L-cysteine functionalized environmentally friendly adsorbent was synthesized via sol-gel processing and applied in the removal of As(V) from aqueous media. The adsorbent demonstrated enhanced As(V) uptake capacities with maximum uptake of 147.5 mg g(-1) at pH 3. Equilibrium was reached at 120 min. Kinetic data were explained by a pseudo-second order model; isotherm data were fitted by a Freundlich model. Reuse of adsorbent after 5 adsorption/desorption cycles indicated similar to 23% removal capacity loss. Elemental analysis results indicated high ligand densities of SG-3PS-Cys. The L-cysteine moieties were thermally stable up to similar to 170 degrees C. Solid state NMR and XPS techniques confirmed the presence of cysteine on the surface of SG-3PS-Cys. Efficient adsorption of As(V) was ensured by the formation of a bidentate complex between the AsO2(OH)(2)(-) anion, the NH3+ and carboxyl groups of L-cysteine. The results of this work demonstrated that SG-3PS-Cys possesses potential in the removal of As(V) from industrial wastewater discharges.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ARSENIC CONTAMINATION; DRINKING-WATER; GROUNDWATER; ADSORPTION; CHEMISORPTION; MECHANISMS; ACIDITY; MCM-41; NORTH; L-cysteine; Amino acid; As (V); Adsorption; Silica; Sol-gel |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Central Analytical Services |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Jan 2024 12:39 |
| Last Modified: | 31 Jan 2024 12:39 |
| URI: | https://pred.uni-regensburg.de/id/eprint/60465 |
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