Adsorption of monothioarsenate on amorphous aluminum hydroxide under anaerobic conditions
文献类型：期刊论文
| 作者 | Jia, Yongfeng2; Xiao, Fan1,2; Wang, Shaofeng2; Xu, Liying2; Wang, Ying1,2; Yuan, Zidan1,2 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2015-06-22 |
| 卷号 | 407页码:46-53 |
| 关键词 | Monothioarsenate As Transformation Xas Ftir Acid-catalyzed Reduction |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2015.04.018 |
| 英文摘要 | Thioarsenates have been found to be major arsenic species in some sulfidic waters and their interactions with minerals play an important role in the geochemical cycling of arsenic. This work investigated the sorption behavior of monothioarsenate (mtAs(V)) on amorphous aluminum hydroxide (am-Al(OH)(3)) at various pHs and characterized the adsorbed arsenic by using X-ray absorption spectroscopy (XAS) and Fourier transform infrared spectroscopy (FTIR). The uptake of arsenic by am-Al(OH)(3) from mtAs(V) solution (86-16 mg.g(-1)) was found to be much less than that from arsenate (As-V) solution (112-50.5 mg.g(-1)) at all pHs applied (4-10). MtAs(V) was partly reduced to arsenite with concurrent production of elemental sulfur, and the interaction with am-Al(OH)(3) at acidic pH enhanced the reduction, which is attributed to acid-catalysis at the am-Al(OH)(3) surface. Transformation of mtAs(V) to arsenate also occurred during the adsorption process. The linear combination fitting (LCF) of As K-edge X-ray absorption near edge structure (XANES) spectra indicated that the arsenic adsorbed on am-Al(OH)(3) was present dominantly as mtAs(V), with minor amounts as arsenite and arsenate. The As K-edge extended X-ray absorption fine structure (EXAFS) and FTIR results suggested that bidentate binuclear complexation was involved in the adsorption of mtAs(V) on am-Al(OH)(3). This study is the first documentation of mtAs(V) sorption on aluminum hydroxides and is necessary to assess geochemical cycling of arsenic in sulfidic natural or mining-impacted environments. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000356234100005 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://210.72.129.5/handle/321005/122087]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Wang, Shaofeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Yongfeng,Xiao, Fan,Wang, Shaofeng,et al. Adsorption of monothioarsenate on amorphous aluminum hydroxide under anaerobic conditions[J]. CHEMICAL GEOLOGY,2015,407:46-53. |
| APA | Jia, Yongfeng,Xiao, Fan,Wang, Shaofeng,Xu, Liying,Wang, Ying,&Yuan, Zidan.(2015).Adsorption of monothioarsenate on amorphous aluminum hydroxide under anaerobic conditions.CHEMICAL GEOLOGY,407,46-53. |
| MLA | Jia, Yongfeng,et al."Adsorption of monothioarsenate on amorphous aluminum hydroxide under anaerobic conditions".CHEMICAL GEOLOGY 407(2015):46-53. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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