兰州市安宁区菜园土壤重金属含量分析与评价

Analysis and Evaluation of Heavy Metal Content of Vegetable Garden Soil in Anning District of Lanzhou City

分析测定兰州市安宁区3个乡菜园土壤中的Cu、Pb、Zn、Cr、Hg 5种重金属元素的含量,并根据GB15618-1995土壤环境质量二级标准对检测结果进行单因子污染指数和综合污染指数评价。结果表明,兰州市安宁区刘家堡乡、吊场乡和孔家崖乡的菜园土壤中重金属元素Cu、Pb、Zn、Cr、Hg的单因子污染指数和综合污染指数均小于1,说明兰州市安宁区菜园土壤重金属环境质量达标,符合无公害蔬菜生产的土壤环境质量要求。

The sampling of soil was done in the vegetable garden soils in Anning district of Lanzhou.The levels of Cu,Pb,Zn,Cr and Hg in soil samples were determined by Inductive Coupled Plasma Emission Spectrometer.According to the soil environment quality standard（GB15618-1995）,the classification and the assessment of the single pollution index and comprehensive pollution index were done to the detection result.The result showed that the soil of Anning district in Lanzhou city was not polluted by the heavy metals（Cu,Pb, Zn, Cr and Hg）in the vegetable garden soil. Both the single index and the synthetic index of the soil pollution were less than 1, indicating that they met the requirements of soil environment for producing pollution-free food.