凤县银洞梁铅锌矿区土壤重金属污染线性与非线性方法结合研究

Comprehensive Assessment and Analysis on the Status of Heavy Metal Pollution in Soil of Yindongliang Lead-zinc Mine Area in Fengxian

选取凤县典型铅锌矿区银洞梁8个监测点的土壤样品,在实验室应用空气-乙炔火焰原子吸收分光光度法进行Cu、Zn、Pb、Cd、Cr五种重金属全量测定。应用密切值法对8个监测点的土壤重金属污染程度进行综合评价,结果表明该矿区土壤已受不同程度重金属污染,其中两个监测点达到了严重污染程度。考察了密切值法的综合评价与单因子污染指数法评价两结果之间的关系,结果表明具有较强迁移能力的矿区主要污染物Zn能够较好的表征矿区土壤重金属的综合污染状况。

Five element （Cu, Zn, Pb, Cd and Cr） contents from eight monitoring points were determined with air-acetylene flame atomic absorption spectrophotometry in soil samples from Yindongliang lead-zinc mine area. The results of comprehensive assessment applying intimate data method on the heavy metal pollution indicated that the soil was polluted by heavy metals in different levels. The study of the osculation-value method and single factor index method showed that Zn which was one of the main contamination in the tested area could characterize the status of heavy metal pollution in soil in mine area.