干旱区生态环境知识资源中心(Arid): Arsenic distribution and speciation in multiphase media of a lake basin, Tibet: The influences of environmental factors on arsenic biogeochemical behavior in the cold arid plateau lake

Arid

DOI	10.1016/j.scitotenv.2020.136772
	Arsenic distribution and speciation in multiphase media of a lake basin, Tibet: The influences of environmental factors on arsenic biogeochemical behavior in the cold arid plateau lake
	Che, Feifei 1; Jiang, Xia 1; Yao, Cheng 1,2; Zhao, Li 1; Wang, Kun 1,2
通讯作者	Jiang, Xia
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	714
英文摘要	Widespread arsenic (As) has been found in surface media on the Tibetan Plateau, but few studies of As species have been performed because of the difficult sampling conditions. In this study, As distribution and speciation in multiphase media (induding surface water, interstitial water, and sediment) in Lake Yamdrok Basin in Tibet in wet and dry seasons were investigated to allow the biogeochemical behavior of As in the cold arid plateau lake to be understood. The total As (TAs) (mainly containing arsenate (As(V)) and arsenite (As(III))) concentrations were generally higher in surface and interstitial water in the lake zones than in billowing rivers. Among the four lake zones, significantly higher As concentrations were found in Chen Co, Yamdrok Tso, and Kongmo Co than in Bajiu Co, and surface sediments from the former three lake zones contained relatively high concentrations of the labile As. Redox potential (Eh) in sediments and HCO3- concentration in surface water primarily controlled labile As mobilization through reductive dissolution of As-bearing iron (hydr)oxides and oxyanion competition for As adsorption sites, and therefore affected the As distributions in aqueous phases. As(III) concentrations in interstitial water accounted for 41% +/- 33% of TAs, and positively correlated with the arsenate-reducing microbe population in sediments. In contrast, As(V) was predominant in surface water (accounting for 95% +/- 8% of TAs), and even trace amounts of dimethylarsinic acid (DMA) was found in wet season. Notably, lower Eh values in dry season triggered a marked increase in the As concentrations in interstitial water, and this probably increased the risk of As contamination of surface water. (C) 2020 Published by Elsevier B.V.
英文关键词	Arsenic species As fractions Migration Transformation Tibetan Plateau
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000517760200010
WOS关键词	SEDIMENT-WATER INTERFACE ; EUTROPHIC LAKE ; SURFACE-WATER ; HEAVY-METALS ; PADDY SOILS ; IRON ; CONTAMINATION ; MOBILIZATION ; GROUNDWATER ; DYNAMICS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315532
作者单位	1.Chinese Res Inst Environm Sci, Natl Engn Lab Lake Pollut Control & Ecol Restorat, Beijing 100012, Peoples R China; 2.Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Che, Feifei,Jiang, Xia,Yao, Cheng,et al. Arsenic distribution and speciation in multiphase media of a lake basin, Tibet: The influences of environmental factors on arsenic biogeochemical behavior in the cold arid plateau lake[J]. 北京师范大学,2020,714.
APA	Che, Feifei,Jiang, Xia,Yao, Cheng,Zhao, Li,&Wang, Kun.(2020).Arsenic distribution and speciation in multiphase media of a lake basin, Tibet: The influences of environmental factors on arsenic biogeochemical behavior in the cold arid plateau lake.SCIENCE OF THE TOTAL ENVIRONMENT,714.
MLA	Che, Feifei,et al."Arsenic distribution and speciation in multiphase media of a lake basin, Tibet: The influences of environmental factors on arsenic biogeochemical behavior in the cold arid plateau lake".SCIENCE OF THE TOTAL ENVIRONMENT 714(2020).