【摘要】 对贵州省农业土壤中重金属Hg、Pb、Cr、Cd以及类金属As进行分析和测定,并对土壤中重金属污染进行了环境质量评价。结果表明:贵州省农业土壤中重金属含量分别为As 17. 5 mg/kg、Pb 45. 0 mg/kg、Cd 0. 342 mg/kg、Cr 48. 2 mg/kg、Hg0.201 mg/kg。与以前提出的贵州土壤背景值相比,Cd比背景值低约50%。贵州省农田土壤综合污染指数为2.81,污染等级为中污染,污染水平为土壤、作物受到中度污染。贵州省土壤重金属污染主要为Cd、Hg的污染。Cd单因子污染指数为4.05,污染等级为重污染。更多还原

【Abstract】 The heavy metals, Hg, Pb, Cr, Cd, As,were determined in the farm soils of Guizhou province. The appraisal for heavy metals pollution was made. The result indicated that the content of heavy metal was 17.5 mg/kg for As, 45.0 mg/kg for Pb, 0.342 mg/kg for Cd, 48.2 mg/kg for Cr, and 0.201 mg/kg for Hg. The content of Cd is about 50% lower than the background contents confirmed before. The comprehensive pollution indictor of the farm soils in Guizhou province was 2.81, which is the middle level. It could be seen that the soils and the crops were middlingly polluted, especially by Cd and Hg. The single factor pollution (indictor) of Cd was 4.05 showing a serious pollution grade.更多还原