选冶矿厂周边土壤中几种重金属污染状况调查分析

Study on the heavy metals pollution in the surrounding soil of metal factory smelting and concentrating

通过对云南个旧某选矿、冶炼厂周边土壤中Pb、Cd、Cr和Zn含量的测定,分析了选矿、冶炼厂周边土壤中重金属污染状况。结果表明,Cr的含量在25.25～218.82mg/kg,Pb的含量在383.49～3085.89mg/kg,Cd的含量12.25～119.14mg/kg,Zn的含量在677.56～5842.26mg/kg。以云南省背景值为评价标准综合污染指数为130.84,以国家环境质量二级标准为评价标准,综合污染指数为48.04。该区域受到Pb、Cd、Cr和Zn等4种重金属污染,污染严重。

The pollution of heavy metals in the Surrounding Soil of Factory Smelting and Concentrating was discussed in this paper. The contents of lead （Pb） ,cadmium （Cd） ,chromium （Cr） and zinc （Zn） in soil samples were measured. The results showed that the contents of Pb , Cd , Cr and Zn ranged from 383.49-3085.89 mg/kg, 12.25-119.14 mg/kg,25.25-218.82 mg/kg and 677.56-5842.26 mg/kg. At the same time, the pollution index was calculated based on both the background values of heavy metals in soils from Yunnan province and the state standard values of soil quality in China. The result indicated that the pollution index was 130.84 and 48.04 based on both the background values of heavy metals in soils from Yunnan province and the state standard values of soil quality in China. The Surrounding Soil of Factory Smelting and Concentrating was polluted by Pb,Cd,Cr and Zn.