Li, JX; Zhang, YX
; Zheng, SL; Liu, FH; Wang, GJ发表期刊FRONTIERS IN MICROBIOLOGY
ISSN1664-302X
2019-02-27
卷号10页码:360
关键词Sinorhizobium sp.anaerobic Sb(III) oxidationFe(II) oxidationSb immobilizationdenitrification
研究领域Microbiology
DOI10.3389/fmicb.2019.00360
产权排序[Li, Jingxin; Zhang, Yuxiao; Wang, Gejiao] Huazhong Agr Univ, Coll Life Sci & Technol, State Key Lab Agr Microbiol, Wuhan, Hubei, Peoples R China; [Zheng, Shiling; Liu, Fanghua] Chinese Acad Sci, Key Lab Coastal Biol & Biol Resources Utilizat, Yantai Inst Coastal Zone Res, Yantai, Peoples R China
作者部门海岸带生物学与生物资源保护实验室
英文摘要Antimony (Sb) pollution is a worldwide problem. In some anoxic sites, such as Sb mine drainage and groundwater sediment, the Sb concentration is extremely elevated. Therefore, effective Sb remediation strategies are urgently needed. In contrast to microbial aerobic antimonite [Sb(III)] oxidation, the mechanism of microbial anaerobic Sb(III) oxidation and the effects of nitrate and Fe(II) on the fate of Sb remain unknown. In this study, we discovered the mechanism of anaerobic Sb(III) oxidation coupled with Fe(II) oxidation and denitrification in the facultative anaerobic Sb(Ill) oxidizer Sinorhizobium sp. GW3. We observed the following: (1) under anoxic conditions with nitrate as the electron acceptor, strain GW3 was able to oxidize both Fe(II) and Sb(III) during cultivation; (2) in the presence of Fe(II), nitrate and Sb(III), the anaerobic Sb(III) oxidation rate was remarkably enhanced, and Fe(III)-containing minerals were produced during Fe(II) and Sb(III) oxidation; (3) qRT-PCR, gene knock-out and complementation analyses indicated that the arsenite oxidase gene product AioA plays an important role in anaerobic Sb(III) oxidation, in contrast to aerobic Sb(III) oxidation; and (4) energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and powder X-ray diffraction (XRD) analyses revealed that the microbially produced Fe(III) minerals were an effective chemical oxidant responsible for abiotic anaerobic Sb(III) oxidation, and the generated Sb(V) was adsorbed or coprecipitated on the Fe(III) minerals. This process included biotic and abiotic factors, which efficiently immobilize and remove soluble Sb(III) under anoxic conditions. The findings revealed a significantly novel development for understanding the biogeochemical Sb cycle. Microbial Sb(III) and Fe(II) oxidation coupled with denitrification has great potential for bioremediation in anoxic Sb-contaminated environments.
文章类型Article
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China [31800093]; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [52201-129181]; Major Research Plan of the National Natural Science Foundation of ChinaNational Natural Science Foundation of China [91751112]
收录类别SCI
语种英语
关键词[WOS]ARSENITE OXIDASE; ANTIMONY; IRON; NITRATE; ENVIRONMENT; REDUCTION; ARSENATE
研究领域[WOS]Microbiology
WOS记录号WOS:000459761200001
引用统计被引频次：13[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/24990
专题海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室
作者单位1.Huazhong Agr Univ, Coll Life Sci & Technol, State Key Lab Agr Microbiol, Wuhan, Hubei, Peoples R China;
2.Chinese Acad Sci, Key Lab Coastal Biol & Biol Resources Utilizat, Yantai Inst Coastal Zone Res, Yantai, Peoples R China
推荐引用方式
GB/T 7714Li, JX,Zhang, YX,Zheng, SL,et al. Anaerobic Bacterial Immobilization and Removal of Toxic Sb(III) Coupled With Fe(II)/Sb(III) Oxidation and Denitrification[J]. FRONTIERS IN MICROBIOLOGY,2019,10:360.
APALi, JX,Zhang, YX,Zheng, SL,Liu, FH,&Wang, GJ.(2019).Anaerobic Bacterial Immobilization and Removal of Toxic Sb(III) Coupled With Fe(II)/Sb(III) Oxidation and Denitrification.FRONTIERS IN MICROBIOLOGY,10,360.
MLALi, JX,et al."Anaerobic Bacterial Immobilization and Removal of Toxic Sb(III) Coupled With Fe(II)/Sb(III) Oxidation and Denitrification".FRONTIERS IN MICROBIOLOGY 10(2019):360.
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