Microbial mobilization of arsenic from iron-bearing clay mineral through iron, arsenate, and simultaneous iron-arsenate reduction pathways
文献类型：期刊论文
| 作者 | Zhao, Ziwang; Meng, Ying; Yuan, Qingke; Wang, Yahua; Lin, Leiming; Liu, Wenbin; Luan, Fubo |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 763页码:- |
| 关键词 | Arsenic mobilization Non tronite NAu-2 Tetrahedral Fe(III) Octahedral Fe(III) Bioreduction pathway |
| ISSN号 | 0048-9697 |
| 英文摘要 | Clay minerals are an important host for arsenic in many arsenic-affected areas. The role of bioreduction of structural Fe(III) in clay minerals in the mobilization of arsenic from clay minerals, however, still remains unclear. In this study, Fe(III) reducing bacterium, As(V) reducing bacterium, and Fe(III)-As(V) reducing bacterium were employed to investigate the possible bioreduction pathways for arsenic release from Nontronite NAu-2. Results demonstrated that microbial reduction controlled arsenic mobilization from NAu-2 through Fe(III). As(V), and simultaneous Fe(III)-As(V) reduction pathways. Although the bioreduction of structural Fe(III) led to a negligible dissolution of NAu-2, it triggered a significant release of arsenic from NAu-2. The bioreduction of tetrahedral Fe (III) initiated the release of As(V), and the further bioreduction of octahedral Fe(III) induced the release of As (III) in NAu-2. In addition, bioreduction of As(V) resulted in the desorption and transformation of As(V) from NAu-2. Simultaneous bioreduction of Fe(III) and As(V) led to an almost complete release of As(V) from NAu-2. These findings suggest that simultaneous Fe(III)-As(V) reduction was the dominant pathway governing As (V) release from NAu-2, while structural Fe(III) reduction controlled As(III) release from NAu-2. Therefore, the bioreduction of iron-bearing clay minerals has a great potential for arsenic mobilization in the subsurface environment. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46235]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Ziwang,Meng, Ying,Yuan, Qingke,et al. Microbial mobilization of arsenic from iron-bearing clay mineral through iron, arsenate, and simultaneous iron-arsenate reduction pathways[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,763:-. |
| APA | Zhao, Ziwang.,Meng, Ying.,Yuan, Qingke.,Wang, Yahua.,Lin, Leiming.,...&Luan, Fubo.(2021).Microbial mobilization of arsenic from iron-bearing clay mineral through iron, arsenate, and simultaneous iron-arsenate reduction pathways.SCIENCE OF THE TOTAL ENVIRONMENT,763,-. |
| MLA | Zhao, Ziwang,et al."Microbial mobilization of arsenic from iron-bearing clay mineral through iron, arsenate, and simultaneous iron-arsenate reduction pathways".SCIENCE OF THE TOTAL ENVIRONMENT 763(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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