Speciation change and redistribution of arsenic in soil under anaerobic microbial activities

doi:10.1016/j.jhazmat.2015.09.030

	Speciation change and redistribution of arsenic in soil under anaerobic microbial activities
	Jia, Yongfeng 2; Ming, Yang 2; Xu, Liying 2; Wu, Xi 1,2; Wang, Shaofeng 2; Yuan, Zidan 2; Xiao, Fan 2
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2016-01-15
卷号	301 页码:538-546
关键词	Arsenic Speciation Soil Anaerobic Microbial Sulfide
ISSN号	0304-3894
DOI	10.1016/j.jhazmat.2015.09.030
英文摘要	Arsenic speciation and behavior in soil are strongly affected by redox conditions. This work investigated speciation transformation and redistribution of arsenic in soil under anaerobic conditions. The effect of microbial sulfidogenesis on these processes was examined by addition of sulfate to the incubation systems. As(III) was found to be the dominant arsenic species in solution during the process of anaerobic incubation. The change of dissolved As concentration with incubation time showed "M" shaped profiles, e.g. the curves displaying two peaks at approximately 24h and 240h for the system with added sulfate. Arsenic was released and reduced to As(III) in the early stage of the incubation, and then resequestered into the solid phase. After excess sulfide was generated, the resequestered arsenic was released again (probably due to the dissolution of arsenic sulfide by dissolved sulfide ions) via the formation of thioarsenite. At the end of the incubation process, most of the dissolved arsenic was removed again from solution. The findings may have important implications to the fate of arsenic in flooded sulfur-rich soils. (C) 2015 Elsevier B.V. All rights reserved.
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000367407200058
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122367]
专题	中国科学院沈阳应用生态研究所
通讯作者	Wang, Shaofeng
作者单位	1.Nanpiao Environm Protect Bur Huludao, Liaoning 125027, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jia, Yongfeng,Ming, Yang,Xu, Liying,et al. Speciation change and redistribution of arsenic in soil under anaerobic microbial activities[J]. JOURNAL OF HAZARDOUS MATERIALS,2016,301:538-546.
APA	Jia, Yongfeng.,Ming, Yang.,Xu, Liying.,Wu, Xi.,Wang, Shaofeng.,...&Xiao, Fan.(2016).Speciation change and redistribution of arsenic in soil under anaerobic microbial activities.JOURNAL OF HAZARDOUS MATERIALS,301,538-546.
MLA	Jia, Yongfeng,et al."Speciation change and redistribution of arsenic in soil under anaerobic microbial activities".JOURNAL OF HAZARDOUS MATERIALS 301(2016):538-546.