Rethinking anaerobic As(III) oxidation in filters: Effect of indigenous nitrate respirers
文献类型：期刊论文
| 作者 | Cui, Jinli; Jing, Chuanyong; Chan, Tingshan; Tian, Haixia; Du, Jingjing |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2018-04-01 |
| 卷号 | 196页码:223-230 |
| 关键词 | Anaerobic As(III) oxidation Nitrate respirers Bacterial diversity Groundwater filtration Landfill incubation |
| ISSN号 | 0045-6535 |
| 文献子类 | Article |
| 英文摘要 | Microorganisms play a key role in the redox transformation of arsenic (As) in aquifers. In this study, the impact of indigenous bacteria, especially the prevailing nitrate respirers, on arsenite (As(III)) oxidation was explored during groundwater filtration using granular TiO2 and subsequent spent TiO2 anaerobic landfill. X-ray absorption near edge structure spectroscopy analysis showed As(III) oxidation (46% in 10 days) in the presence of nitrate in the simulated anaerobic landfills. Meanwhile, iron (Fe) species on the spent TiO2 were dominated by amorphous ferric arsenate, ferrihydrite and goethite. The Fe phase showed no change during the anaerobic landfill incubation. Batch incubation experiments implied that the indigenous bacteria completely oxidized As(III) to arsenate (As(V)) in 10 days using nitrate as the terminal electron acceptor under anaerobic conditions. The bacterial community analysis indicated that various kinds of microbial species exist in groundwater matrix. Phylogenetic tree analysis revealed that Proteobacteria was the dominant phylum, with Hydrogenophaga (34%), Limnohabitans (16%), and Simplicispira (7%) as the major bacterial genera. The nitrate respirers especially from the Hydrogenophaga genus anaerobically oxidized As(III) using nitrate as an electron acceptor instead of oxygen. Our study implied that microbes can facilitate the groundwater As oxidation using nitrate on the adsorptive media. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41032]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Cui, Jinli,Jing, Chuanyong,Chan, Tingshan,et al. Rethinking anaerobic As(III) oxidation in filters: Effect of indigenous nitrate respirers[J]. CHEMOSPHERE,2018,196:223-230. |
| APA | Cui, Jinli,Jing, Chuanyong,Chan, Tingshan,Tian, Haixia,&Du, Jingjing.(2018).Rethinking anaerobic As(III) oxidation in filters: Effect of indigenous nitrate respirers.CHEMOSPHERE,196,223-230. |
| MLA | Cui, Jinli,et al."Rethinking anaerobic As(III) oxidation in filters: Effect of indigenous nitrate respirers".CHEMOSPHERE 196(2018):223-230. |
入库方式： OAI收割
来源：生态环境研究中心
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