DOI: 10.1016/j.marpolbul.2016.08.076
Scopus记录号: 2-s2.0-85003782002
论文题名: Bioavailability and risk assessment of arsenic in surface sediments of the Yangtze River estuary
作者: Wang H. ; Liu R. ; Wang Q. ; Xu F. ; Men C. ; Shen Z.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2016
卷: 113, 期: 2018-01-02 起始页码: 125
结束页码: 131
语种: 英语
英文关键词: Arsenic
; Bioavailability
; Fraction
; Speciation
; Yangtze River estuary
Scopus关键词: Arsenic
; Biochemistry
; Ecology
; Estuaries
; Manganese
; Rivers
; Sediments
; Bioavailability
; Carbonate fraction
; Fraction
; Potential ecological risk
; Reducing conditions
; Risk assessment code
; Speciation
; Yangtze River estuary
; Risk assessment
; arsenic
; carbonic acid
; iron oxide
; manganese oxide
; arsenic
; carbonic acid derivative
; heavy metal
; water pollutant
; arsenic
; bioavailability
; environmental risk
; estuarine sediment
; fractionation
; risk assessment
; sediment pollution
; speciation (chemistry)
; Article
; bioavailability
; China
; concentration (parameters)
; controlled study
; ecotoxicology
; estuary
; reduction
; risk assessment
; seasonal variation
; sediment
; water analysis
; water pollution
; analysis
; bioavailability
; chemistry
; ecology
; environmental monitoring
; metabolism
; procedures
; risk assessment
; river
; season
; sediment
; water pollutant
; China
; Yangtze Estuary
; Arsenic
; Biological Availability
; Carbonates
; China
; Ecology
; Environmental Monitoring
; Estuaries
; Geologic Sediments
; Metals, Heavy
; Risk Assessment
; Rivers
; Seasons
; Water Pollutants, Chemical
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: The bioavailability and risk assessment of As were studied in sediments of the Yangtze River estuary (YRE). Results showed that residual fractions dominated the As partition (> 85%), which attenuated overall bioavailability. After the residual fraction, As mainly partitioned into the Fe-Mn oxides fraction (3.16–4.22%). Arsenic bound to Fe-Mn oxides was higher in wet seasons. The carbonate fraction was minimal, which may result from the negative state presence of As in sediments. According to the risk assessment code, the YRE was classified as low risk. Additionally, the reduction of As(V) to As(III) may occur due to the reducing condition in wet seasons. Considering As(III) is more toxic and mobile, As bound to the exchangeable and Fe-Mn oxides fractions may have more potential ecological risk. Thus, the speciation and fraction should be both considered on the ecological risk of As in sediments of the YRE. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/86622
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
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作者单位: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, China
Recommended Citation:
Wang H.,Liu R.,Wang Q.,et al. Bioavailability and risk assessment of arsenic in surface sediments of the Yangtze River estuary[J]. Marine Pollution Bulletin,2016-01-01,113(2018-01-02)