宝鸡二电厂周边农田土壤重金属污染特征及评价  

Characteristics and evaluation of heavy metal pollution in soil of farmland around Baoji Second Power Plant

作　　者：李晓雪[1] 卢新卫[1] 任春辉[1] 陈灿灿[1] 王利军[1] 罗大成[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《干旱地区农业研究》2012年第2期220-224,254,共6页Agricultural Research in the Arid Areas

基　　金：教育部新世纪优秀人才支持计划项目(NCET-05-0861);中央高校基本科研业务费专项资金项目(GK200901008)

摘　　要：采集宝鸡二电厂周边34处农田土壤样品,采用X-Ray荧光光谱仪测定土壤样品中Cu、Pb、Zn、Co、Cr、Mn、Ni、V的含量,利用内梅罗综合污染指数法和Hakanson潜在生态风险指数法评价土壤重金属的污染水平及潜在生态风险。结果表明:宝鸡二电厂周边农田土壤中Cu、Pb、Zn、Co、Cr、Mn、Ni、V的含量均高于陕西表层土壤背景值,电厂西南方向土壤中Cr、Mn含量最大,东北方向土壤中含量最小,其他重金属元素的含量在各方位变化不明显;电厂周边农田土壤中Cu、Pb、Zn、Co、Cr、Mn、Ni、V均处于轻度污染状态,各采样点重金属综合污染属于轻度;土壤中各重金属元素均处于轻度生态风险,总的潜在生态风险处于中等水平。Thirty four soil samples were collected from farmland around Baoji Second Power Plant.The concentrations of Cu,Pb,Zn,Co,Cr,Mn,Ni and V in the soil samples were analyzed by using X-Ray fluorescence spectrometry.The contamination level and ecological risk of heavy metals in soil were assessed by Nemerow synthetical pollution index method and Hakanson potential ecological risk index method.The results show that the concentrations of Cu,Pb, Zn,Co,Cr,Mn,Ni and V in soil from farmland around Baoji second power plant were higher than the background values of corresponding elements of surface soil in Shaanxi Province.The concentrations of Cr and Mn had a similar space changing tendency and there was no significant difference in the space concentration distribution for other five heavy metals.The contamination level of Cu,Pb,Zn,Co,Cr,Mn,Ni and V and the heavy metals synthetical contamination level in soil were low.The potential ecological risk level of Cu,Pb,Zn,Co,Cr,Mn,Ni and V in soil was low,while the total potential ecological risk level of heavy metals in soil was middle.

关 键 词：电厂 表层土壤 重金属污染 生态风险 评价 

分 类 号：X833[环境科学与工程—环境工程]