Simultaneous removal of antimony and arsenic by nano-TiO2-crosslinked chitosan (TA-chitosan) beads
Antimony (Sb) and arsenic (As), carcinogenic and toxic elements, cause environmental pollution, in addition, the different chemical properties of Sb and As make them difficult to co-removal. In this study, we incorporated of nano-TiO2 in the chitosan matrix to synthesized an efficient adsorption mat...
| Veröffentlicht in: | Environmental technology. - 1993. - 44(2023), 19 vom: 01. Juli, Seite 2913-2923 |
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| Weitere Verfasser: | , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2023
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| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Chitosan antimony arsenic co-adsorption nano-TiO2 Antimony 9IT35J3UV3 titanium dioxide 15FIX9V2JP mehr... |
| Zusammenfassung: | Antimony (Sb) and arsenic (As), carcinogenic and toxic elements, cause environmental pollution, in addition, the different chemical properties of Sb and As make them difficult to co-removal. In this study, we incorporated of nano-TiO2 in the chitosan matrix to synthesized an efficient adsorption material nano-titania-crosslinked chitosan (TA-chitosan) beads, which was used to simultaneous removal of Sb and As from aqueous solution. TA-chitosan possesses a robust high removal performance for Sb and As under weakly acidic and neutral conditions; however, the removal is significantly inhibited under alkaline pH values. The adsorption kinetics of Sb and As on TA-chitosan conformed to the pseudo-second-order model, indicating that the removal of Sb and As was a chemical adsorption process. The adsorption isotherms of Sb(III/V) and As(III/V) on TA-chitosan follow the Langmuir model, and their maximum adsorption capacities are 70.19, 25.32, 64.52 and 102.89 mg·g-1, respectively. The zeta potential showed that the surface of TA-chitosan was negatively charged over the full pH range upon Sb and As adsorption, demonstrating that negatively charged inner-sphere complexes were formed on TA-chitosan. This work may also provide a new perspective in titanium-chitosan material synthesis and heavy metal ions co-removal |
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| Beschreibung: | Date Completed 07.07.2023 Date Revised 18.07.2023 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2022.2048084 |