Redox conditions and nutrients affect the mobility of arsenic in coastal sediments

doi:10.1007/s12665-022-10573-9

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Redox conditions and nutrients affect the mobility of arsenic in coastal sediments
	Liu, Xiaozhu 1,2; Ma, Tao 1,2; Liu, Qunqun 2; Sheng, Yanqing 2
刊名	ENVIRONMENTAL EARTH SCIENCES
	2022-09-01
卷号	81 期号:18 页码:10
关键词	Arsenic Coastal sediments Redox conditions Nutrients
ISSN号	1866-6280
DOI	10.1007/s12665-022-10573-9
通讯作者	Sheng, Yanqing(yqsheng@yic.ac.cn)
英文摘要	In this study, the effects of redox conditions, nitrogen (NH4+-N and NO3--N) and phosphate in the overlying water on the release of arsenic (As) in coastal sediments were investigated. The results indicated that the release of As under anaerobic conditions presented a release-dynamic equilibrium pattern. The reduction of arsenate (As(V)) to arsenite (As(III)) under anaerobic conditions was the main factor promoting the release of As. The reductive dissolution of Fe(III) oxides contributed very limited to the release; the release-remove-release pattern was observed under aerobic conditions. Although Fe(III) oxides has strong adsorption capacity for As, sulfide oxidation may be a source of As, which may continuously release As under aerobic conditions. In addition, low concentration (< 6 mg L-1) of nitrogen may stimulate anaerobic metabolism of microorganisms, resulting in reduction and dissolution of As. The low pH of high concentration (> 6 mg L-1) of nitrogen may affect the microbial community and thus decreased the concentration of As. Since the reduction of Fe(III) oxides decreased the adsorption sites, the competitive adsorption of phosphate had no significant effect on the release of As under anaerobic conditions. Totally, this study provides a new understanding of the behavior of As in coastal sediments under variable environments.
WOS关键词	MICROBIAL SULFATE REDUCTION ; DISSOLVED-OXYGEN ; HEAVY-METALS ; RISK-ASSESSMENT ; RIVER ; RELEASE ; SULFUR ; PH ; GEOCHEMISTRY ; PHOSPHORUS
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
WOS记录号	WOS:000852382700002
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Project of Shandong Provincial Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/31673]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者	Sheng, Yanqing
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaozhu,Ma, Tao,Liu, Qunqun,et al. Redox conditions and nutrients affect the mobility of arsenic in coastal sediments[J]. ENVIRONMENTAL EARTH SCIENCES,2022,81(18):10.
APA	Liu, Xiaozhu,Ma, Tao,Liu, Qunqun,&Sheng, Yanqing.(2022).Redox conditions and nutrients affect the mobility of arsenic in coastal sediments.ENVIRONMENTAL EARTH SCIENCES,81(18),10.
MLA	Liu, Xiaozhu,et al."Redox conditions and nutrients affect the mobility of arsenic in coastal sediments".ENVIRONMENTAL EARTH SCIENCES 81.18(2022):10.