Anaerobic Bacterial Immobilization and Removal of Toxic Sb(III) Coupled With Fe(II)/Sb(III) Oxidation and Denitrification

doi:10.3389/fmicb.2019.00360

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 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利用所重点实验室

	Anaerobic Bacterial Immobilization and Removal of Toxic Sb(III) Coupled With Fe(II)/Sb(III) Oxidation and Denitrification
	Li, JX ; Zhang, YX ; Zheng, SL ; Liu, FH ; Wang, GJ
刊名	FRONTIERS IN MICROBIOLOGY
	2019-02-27
卷号	10 页码:360
关键词	Sinorhizobium sp. anaerobic Sb(III) oxidation Fe(II) oxidation Sb immobilization denitrification
ISSN号	1664-302X
DOI	10.3389/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
文献子类	Article
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.
WOS关键词	ARSENITE OXIDASE ; ANTIMONY ; IRON ; NITRATE ; ENVIRONMENT ; REDUCTION ; ARSENATE
WOS研究方向	Microbiology
语种	英语
WOS记录号	WOS:000459761200001
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]
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24990]
专题	烟台海岸带研究所_海岸带生物学与生物资源利用所重点实验室
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 7714	Li, 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.
APA	Li, 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.
MLA	Li, 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.