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Spatial distribution and ecological risk assessment of heavy metals in surface sediments from a typical plateau lake wetland, China
Bai, Junhong1; Cui, Baoshan1; Chen, Bin1; Zhang, Kejiang2; Deng, Wei3; Gao, Haifeng1; Xiao, Rong1
通讯作者Junhong Bai
2011-01-24
发表期刊ECOLOGICAL MODELLING
ISSN0304-3800
卷号222期号:2页码:301-306
文章类型Article
摘要Surface sediment (0-15 cm) samples were collected from 31 different grid points throughout the Yilong Lake in April 2004. Samples were subjected to a total digestion technique and analyzed for As, Cd, Cr, Pb, Ni, Cu, and Zn in order to study spatial distribution characteristics based on Kriging method and assess their ecological risks posed by these heavy metals. Results showed that the mean concentrations of these heavy metals were lower than potential effect levels. Patches of higher heavy metal concentrations occurred in the inflow area of the Cheng River and northeast area nearby the road and railway. The higher concentrations of As and Cr also appeared in the east area (lake outlet), while the patches of lower concentrations were uniformly distributed at the southwest corner between Luosewan and Xiaoguoxi. The heavy metal loads such as As, Cd and Pb might come from the common sources due to industrial sewage and traffic pollution, while higher concentrations of Ni, Cr, and Zn in these sediments were dominated by parent rocks. However, Cu originated from both sources. Sediments with respect to As, Cd and Cu were grouped below the effect range low (ERL) at all sites, and with respect to Cr and Pb were grouped into the range from ERL to the effect range median (ERM) at more than 50% of sampling sites. The mean heavy metal toxic units in the Yilong Lake decreased following the order Pb > Cr > As > Ni > Zn > Cd > Cu, with higher contributions to the sum of toxic units of Pb, Cr and As. (C) 2009 Elsevier B.V. All rights reserved.
关键词Surface Sediment Heavy Metals Spatial Distribution Ecological Risk Assessment
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.ecolmodel.2009.12.002
研究领域[WOS]Environmental Sciences & Ecology
收录类别SCI
关键词[WOS]QUALITY GUIDELINES ; ROADSIDE SOILS ; RIVER ; CONTAMINATION ; WATER ; ECOSYSTEMS ; ESTUARY ; URANIUM ; MARINE
语种英语
WOS类目Ecology
WOS记录号WOS:000286542000011
项目资助者National Basic Research Program of China(2006CB403301) ; National Natural Science Fund(50879005 ; U0833002 ; 40701003)
引用统计
被引频次:137[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.imde.ac.cn/handle/131551/5341
专题山区发展研究中心
作者单位1.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
2.Univ Calgary, Ctr Environm Engn Res & Educ, Calgary, AB T2N 1N4, Canada
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
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Bai, Junhong,Cui, Baoshan,Chen, Bin,et al. Spatial distribution and ecological risk assessment of heavy metals in surface sediments from a typical plateau lake wetland, China[J]. ECOLOGICAL MODELLING,2011,222(2):301-306.
APA Bai, Junhong.,Cui, Baoshan.,Chen, Bin.,Zhang, Kejiang.,Deng, Wei.,...&Xiao, Rong.(2011).Spatial distribution and ecological risk assessment of heavy metals in surface sediments from a typical plateau lake wetland, China.ECOLOGICAL MODELLING,222(2),301-306.
MLA Bai, Junhong,et al."Spatial distribution and ecological risk assessment of heavy metals in surface sediments from a typical plateau lake wetland, China".ECOLOGICAL MODELLING 222.2(2011):301-306.
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