赣州稀土矿山废弃地土壤重金属污染现状评价

Evaluation of the soil heavy metal pollution in Ganzhou rare earth mine wasteland

为了解稀土矿山土壤重金属污染现状,以赣州某稀土矿山废弃地作为研究对象,测定了3类废弃地及矿区周边对照区土壤的重金属含量,采用单因子污染指数、内梅罗指数和潜在生态风险指数三种评价方法对废弃地污染现状进行评价。结果表明,废弃地堆浸场和母液处理车间土壤汞含量超过土壤二级标准,堆浸场达中度污染水平,母液处理车间属于轻度污染,综合潜在生态风险为轻度。

To understand the soil heavy metal pollution situation of rare earth mine,this paper takes Ganzhou rare earth mine wasteland as the research object.The heavy metal content of soil samples,which fetching from three types of wasteland and surrounding field,are measured.Three types of assessing methods,single factor pollution index,Nemerow index and potential ecological risk index,are used in this paper.The results show that：the mercury concentrations of soil samples in waste heap leaching and liquor treatment plant exceeded the secondary standard,the pollution level of heap leaching field is moderate,and the liquor treatment plant is light,comprehensive potential ecological risk of the wasteland as mild.