山西典型工业发展区土壤重金属潜在生态风险评价

Assessment on the Potential Ecological Risk of Heavy Metals in the Soil of Typical Industrial Development Area of Shanxi Province

采用野外采样和室内分析相结合的方法,以山西省典型工业区农田表层土壤（0~20 cm）为研究对象,分析了土壤中重金属Hg,As,Cd,Cr,Pb,Cu,Ni,Zn的含量,探讨了土壤中重金属的含量与不同人类活动的关系,并进行了潜在生态风险评价。结果显示,8种重金属的含量均超过山西省土壤表层的背景值;表层土壤的潜在生态风险评价表明,当地的农田土壤Cr,Ni,Pb,As,Cu,Zn有轻度的生态风险,Cd和Hg存在较大的生态风险。工业区土壤的污染程度明显高于其他地区,局部地区已出现极强污染。

The contents of toxic metal Hg,As, Cd, Cr, Pb, Cu, Ni and Zn were investigated by sampling the topsoil（0-20 cm）from suburb cropland in Jiexiu city, and their relations with different human activities were discussed. The potential ecological risks of these heavy metals were assessed. The results showed that the content of the eight metals in all of the soil samples exceeded the background value of the soil surface of Shanxi province. The potential ecological risks of Cr, Ni, Pb, As, Cu, Zn were at lower level, while that of Cd and Hg were at a higher level. Industrial areas pollution of soil was significantly higher than other areas, some areas had emerged highly contaminated.