某铀矿山环境土壤重金属污染评价

Assessment of Heavy Metal Soil Pollution in the Environment of a Uranium Mine

以某铀矿山水冶厂、尾矿坝及矿井周边土壤重金属元素含量实测值为基础数据,应用单因子污染指数法、内梅罗综合污染指数法、地积累指数法和潜在生态危害指数法对土壤重金属污染状况进行了综合、全面的分析评价。结果表明,3个样地及每个样地的7种重金属元素均表现出程度不同的污染。样地重金属综合污染程度排序为尾矿坝>水冶厂>矿井周边;从各重金属元素污染程度看,Cd污染最严重,其次是Cr和Cu。该评价结果可以为矿山环境治理提供科学依据。

Based on the real monitoring data of the soil heavy metal elements sampled from water treatment plant, tailings dam and the surrounding soil of a uranium mine, the heavy metal pollution of soils are comprehensively analyzed and assessed by adopting the single factor pollution index, the Nemerow integrated pollution index method, the index of geo-accumulation and the potential ecological hazard index method. The results show that there are different levels of pollu- tion at three sampling sites and seven heavy metal elements at each sample. For the integrated pollution levels of heavy met- als at each sample, the tailings dam is the most and followed by the water treatment plant and the mine surroundings in turn. For the pollution level of each element, Cd is the worst, and followed by Cr and Cu in turn. This assessment can pro- vide a scientific basis for the environmental governance in the mine.