伊犁矿区风险点土壤重金属污染特征及生态风险评价

摘要

In order to study the heavy metal pollution of soil in Yili mining area,the contents of heavy metals including Cd,Ni,Pb,Cr,Cu and Zn were determined by atomic absorption in 4 mining areas,the soil heavy metals in Yili mining area were evaluated by means of geo accumulation index and potential ecological risk index.The results showed that the pollution degree of heavy metals of soil around the mining area was different,based on the soil environmental quality standard,the total contents of heavy metals of soil infour mining areas(13,14,17,87)were close to the soil environmental quality standards.The results of applying geo accumulation index showed that the highest pollution level of heavy metal in the 87 district was Cu and the highest potential ecological hazard in the four mining areas was Cu.%为研究伊犁矿区土壤重金属污染现状,采用原子吸收法测定了4个矿区中 Cd、Ni、Pb、Cr、Cu和Zn等6种土壤重金属含量,利用地累积指数法、潜在生态危害指数法对伊犁矿区土壤重金属污染进行评价.结果表明,矿区周边土壤重金属元素污染程度有差异,以土壤环境质量标准为评价依据,4个矿区(13、14、17、87区)土壤重金属总体含量与土壤环境质量标准相接近.运用地累积指数进行评价的结果显示,87区中重金属的污染程度最高的是Cu,4个矿区潜在生态危害程度最高的是Cu.