Molecular level study of cadmium adsorption on dithiocarbamate modified chitosan
文献类型：期刊论文
| 作者 | Yin, Zheng; Qiu, Dong; Zhang, Meiyi
|
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2021-02-15 |
| 卷号 | 271页码:- |
| 关键词 | Cadmium Dithiocarbamate chitosan Complexation mechanism FTIR XAFS |
| ISSN号 | 0269-7491 |
| 英文摘要 | It has been shown that chemical modification of chitosan with sulfur (S) functional groups could significantly enhance its chelating capability with heavy metals included Cd(II). However, a molecular level understanding has been lacking. Here, we carried out X-ray absorption fine structure (XAFS) and Fourier transformed infrared (FTIR) spectra studies to bridge this knowledge gap. The results indicate that both Cd-O/N and Cd-S bonds exist in the complex of Cd(II) with dithiocarbamate chitosan (DTC-CTS). S functional groups (dithiocarbamate) in DTC-CTS play the major role in complexation with Cd(II) and S content affects the adsorption mechanism. At low S content, Cd(II) is mainly adsorbed on DTC-CTS as an outer-sphere complex with two monodentate amino groups and two water molecules in tetrahedral configuration. At high S content, Cd adsorption dominantly occurs by formation of an inner-sphere complex with two bidentate mononuclear S ligands in tetrahedral configuration. This investigation provides information on the effectiveness and mechanisms of Cd(II) removal that is critical for evaluating modified chitosan applications for stabilization of Cd(II) in surface water, groundwater, soils and sediments. (C) 2020 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45966]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yin, Zheng,Qiu, Dong,Zhang, Meiyi. Molecular level study of cadmium adsorption on dithiocarbamate modified chitosan[J]. ENVIRONMENTAL POLLUTION,2021,271:-. |
| APA | Yin, Zheng,Qiu, Dong,&Zhang, Meiyi.(2021).Molecular level study of cadmium adsorption on dithiocarbamate modified chitosan.ENVIRONMENTAL POLLUTION,271,-. |
| MLA | Yin, Zheng,et al."Molecular level study of cadmium adsorption on dithiocarbamate modified chitosan".ENVIRONMENTAL POLLUTION 271(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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