RCEES OpenIR  > 环境化学与生态毒理学国家重点实验室
Rethinking anaerobic As(III) oxidation in filters: Effect of indigenous nitrate respirers
Cui, Jinli; Du, Jingjing; Tian, Haixia; Chan, Tingshan; Jing, Chuanyong
2018-04-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume196Pages:223-230
AbstractMicroorganisms 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.
Department环境化学与生态毒理学国家重点实验室
KeywordAnaerobic As(III) oxidation Nitrate respirers Bacterial diversity Groundwater filtration Landfill incubation
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/41032
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Cui, Jinli,Du, Jingjing,Tian, Haixia,et al. Rethinking anaerobic As(III) oxidation in filters: Effect of indigenous nitrate respirers[J]. CHEMOSPHERE,2018,196:223-230.
APA Cui, Jinli,Du, Jingjing,Tian, Haixia,Chan, Tingshan,&Jing, Chuanyong.(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.
Files in This Item: Download All
File Name/Size DocType Version Access License
Rethinking anaerobic(1732KB)期刊论文出版稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Cui, Jinli]'s Articles
[Du, Jingjing]'s Articles
[Tian, Haixia]'s Articles
Baidu academic
Similar articles in Baidu academic
[Cui, Jinli]'s Articles
[Du, Jingjing]'s Articles
[Tian, Haixia]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Cui, Jinli]'s Articles
[Du, Jingjing]'s Articles
[Tian, Haixia]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Rethinking anaerobic As(III) oxidation in filters Effect of indigenous nitrate respirers.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.