钼矿区土壤中重金属污染状况的分析与评价

Analysis and Assessment on the Pollution Condition of Heavy Metals in the Soil of Molybdenum Mine

对葫芦岛钼矿区土壤重金属污染的情况进行了详细研究。选择土壤样本80个,采用HNO3-HF-HClO4混酸对土壤样品进行处理,运用等离子体发射光谱仪(ICP-OES)测定土壤样品中Pb、As、Hg、Cr、Cd、Zn、Cu、Ni、Mo的含量,全面系统地评价土壤重金属污染现状。结果表明,该矿区土壤重金属As、Cd和Hg污染较为严重,平均含量分别达154.13mg/kg,74.92mg/kg和3.06mg/kg。不同片区间存在明显差别,污染强度以矿山山沿污染最高,其次是运输区、选矿厂及矿区附近山地,内梅罗综合指数分别为78.34、74.34、71.42、68.55。

This article studied the heavy metals pollution in the soil of molybdenum ore areas. Choosing 80 soil samples and using HNO3 -HF-HClO4 mixture to deal with the samples. The contents of Pb, As, Hg, Cr, CA, Zn, Cu, Ni , Mo were analyzed by ICP-OES. The results indicates that the contents of As, CA and Hg in the soil are 154. 13mg/kg, 74. 92mg/kg and 3.06mg/kg. But the contents of heavy metals in different zones have distinct differences, the pollution intense of the ore areas form heavy to light is the transportation zone , the ore collection area and the mountanious region near the mine,which the Nemero indexes are 78. 34,74. 34,71.42 and 68. 55.