DOI: 10.1016/j.marpolbul.2017.07.034
Scopus记录号: 2-s2.0-85024481286
论文题名: Spatial-temporal distribution and risk assessment of mercury in different fractions in surface sediments from the Yangtze River estuary
作者: Wang Q. ; Liu R. ; Men C. ; Xu F. ; Guo L. ; Shen Z.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2017
卷: 124, 期: 1 起始页码: 488
结束页码: 495
语种: 英语
英文关键词: Fractions of mercury
; Risk assessment
; Sediment
; Spatial distribution
; Yangtze River estuary
Scopus关键词: Binary alloys
; Ecology
; Estuaries
; Iron alloys
; Manganese alloys
; Mercury (metal)
; Rivers
; Sediments
; Spatial distribution
; Carbonate fraction
; Potential ecological risk
; Residual fraction
; Risk assessment code
; Spatial-temporal distribution
; Surface sediments
; Temporal and spatial distribution
; Yangtze River estuary
; Risk assessment
; carbonic acid
; manganese oxide
; mercury
; estuarine sediment
; mercury (element)
; risk assessment
; sediment pollution
; spatiotemporal analysis
; Article
; China
; concentration (parameters)
; environmental monitoring
; estuary
; flow rate
; hydrodynamics
; precipitation
; risk assessment
; seasonal variation
; sediment
; surface property
; China
; Yangtze River
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: The temporal and spatial distributions of mercury in different fractions and its potential ecological risk were investigated in sediments from the Yangtze River estuary (YRE) by analyzing data collected from the study area. The results showed that mercury in the organic and residual fractions had dominant proportions, from 15.2% to 48.52% and from 45.96% to 81.59%, respectively. The fractions were more susceptible to seasonal changes than other fractions. Higher proportions of mercury in organic fraction were found in wet seasons; the opposite was true for mercury in residual fraction. With respect to the spatial distribution, the concentration mercury in exchangeable, carbonate and Fe-Mn oxide fractions showed a decreasing trend from the inner estuary to the outer estuary, but no obvious trends were found in the distributions of mercury in the organic and residual fractions. The risk assessment code (RAC) was used to evaluate the potential ecological risk in the study area based on the proportions of exchangeable and carbonate fractions. The average RAC values during the four periods were 6.00%, 2.20%, 2.83%, and 0.61%. Although these values show that the risk in the study area is generally low, the distribution of RAC values indicates that the inner estuary has a medium risk, with a value up to 10%. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/87459
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 Q.,Liu R.,Men C.,et al. Spatial-temporal distribution and risk assessment of mercury in different fractions in surface sediments from the Yangtze River estuary[J]. Marine Pollution Bulletin,2017-01-01,124(1)