南水北调与水利科技2017，Vol.15Issue(6)：74-80,107,8.DOI:10.13476/j.cnki.nsbdqk.2017.06.011
北京市中心城河流表层沉积物重金属污染评价
Assessment on heavy metal pollution of the surface sediments from rivers in Beijing central district
摘要
Abstract
To investigate the pollution status of heavy metals in the surface sediments from rivers in Beijing Central District,we used the methods of the Geoaccumulation Index,principal component analysis,and Potential Ecological Risk Index to evaluate the pollution level,pollution sources,and potential ecological risks of the heavy metals including Hg,As,Pb,Cr,Cd,Mn,and Cu,respectively.The results showed that the average contents of the heavy metals were as follows:Hg 0.670 mg/kg,As 6.01 mg/kg,Pb 31.1 mg/kg,Cr 83 mg/kg,Cd 0.29 mg/kg,Mn 277 mg/kg,Cu 45 mg/kg.The descending order by the average Geoaccumulation Index was Hg(1.49)＞Cr(0.34)＞Cu(0.24)＞Cd(0.14)＞Pb(-0.77)＞As(-1.41)＞Mn(-2.30),showing that the surface sediments were mainly polluted by Hg,Cr,Cu,and Cd elements,with Hg at moderate pollution level and Cr,Cu,Cd at mild to moderate pollution level The pollution mainly came from three sources:traffic,vehicle repairing,and heating coal combustion.The descending order by the average Potential Ecological Risk Coefficient was Hg (357) ＞ Cd (80) ＞ Cu (13) ＞ As (9)＞Pb(7)＞Cr(4)＞Mn(2),and the average Potential Ecological Risk Index of the sediments was 472,suggesting strong ecological hazard of the sediments in general.关键词
沉积物/重金属/地累积指数/主成分分析/来源/生态风险Key words
sediment/heavy metal/Geoaccumulation Index/principal component analysis/source/ecological risk分类
资源环境引用本文复制引用
王永刚,伍娟丽,王旭,徐菲,李焕利..北京市中心城河流表层沉积物重金属污染评价[J].南水北调与水利科技,2017,15(6):74-80,107,8.基金项目
水体污染控制与治理科技重大专项(2012ZX07203-001-01).Major Project of Water Pollution Control and Treatment Science and Technology (2012ZX07203-001-01) （2012ZX07203-001-01）
