安徽宿州市沱河底泥中重金属元素地球化学特征  

Geochemical Characteristics of Heavy Metal Elements in Sediments of the Tuohe River in Suzhou City,Anhui Province

作　　者：陈松[1,2] 黄淑玲[1,2] 孙林华[1,2] 张勇[1] 

机构地区：[1]宿州学院地球科学与工程学院,安徽宿州234000 [2]安徽省煤矿勘探技术研究中心,安徽宿州234000

出　　处：《地球与环境》2011年第3期331-337,共7页Earth and Environment

基　　金：安徽省教育厅自然科学重点项目(KJ2011A261);安徽省教育厅自然科学项目(KJ2011B177);宿州学院科研平台开放课题(2011YKF22;2010YKF28)

摘　　要：在系统采集宿州市沱河表层沉积物的基础上,对其重金属元素含量进行了XRF测试。结果表明:宿州市沱河沉积物中重金属元素的含量较高,Pb、As、Cr、Cu、Zn平均含量分别为40.8μg/g、14.6μg/g、58.8μg/g、52.2μg/g、143.3μg/g。富集因子和地积累指数法对重金属污染程度的评价表明,Cr无污染,Pb和As为轻污染,Zn和Cu为中度污染。基于主成分分析的重金属来源分析结果显示,As主要受控于第一因子,Cu、Zn受控于第二因子,而Pb则受到两种因素的控制。结合其他证据表明,化石燃料燃烧(发电)可能是造成As及Pb污染的主要因素,Zn主要由电池和化学物质的排放引起,Cu则与农业生产活动有关。Based on systematic collection of the surface sediments of the Tuohe River in Suzhou City,the concentrations of heavy metals were measured by XRF.The results indicated that the concentrations of heavy metals in the Tuohe River are high as expressed by Pb,As,Cr,Cu and Zn,and their average concentrations are 40.8,14.6,58.8,52.2 and 143.3μg/g,respectively.The evaluation of pollution degree based on enrichment factor and geo-accumulation index showed that heavy metals of the sediments can be subdivided into three types： no-pollution（Cr）,light-pollution（Pb and As）,and moderate-pollution（Zn and Cu）.Source discrimination of heavy metals by principle analysis indicated that As is controlled by the first factor,Cu and Zn are controlled by the second factor,and Pb is related to these two factors.In combination with other evidence,fossil fuel combustion（e.g.electricity generation） is considered to be the source of As and Pb,whereas the discharge of batteries and chemical materials,as well as agricultural activities,are related to the pollution of Zn and Cu,respectively.

关 键 词：重金属污染 富集因子 地累积指数 主成分分析 沉积物 沱河 

分 类 号：X522[环境科学与工程—环境工程] P595[天文地球—地球化学]