山东省典型农田土壤中重金属污染评价

Assessing the Potential Ecological Risks of Heavy Metals in Farmland Soils in Shandong Province

以山东省基本农田土壤为研究对象,采用地积累指数法和潜在生态风险指数法分析了土壤中Cu、Zn、Pb、Cd的污染程度。由潜在生态风险指数可以看出山东省农田土壤重金属潜在生态风险级别褐土为B级,潜在生态危害程度中等;潮土为A级,潜在生态危害程度轻微;棕壤为B级,潜在生态危害程度中等。就单个元素来看,Cd元素的潜在生态危害程度最高,各元素的潜在生态危害程度为Cd>Pb>Cu>Zn。由地累积指数法可以看出Pb的风险级别最大;其次是Cu元素;Cd、Zn的污染程度相比较而言较轻,风险级别低,各元素的污染程度和风险级别为Pb>Cu>Cd>Zn。

Using the basic farmland of Shandong Province served as object,the potential ecological risks of Cu and Zn,Pb,Cd in the soil was evaluated by using the index of potential ecological risk and the index of geoaccumulation.Results based on the index of potential ecological risk showed that the potential ecological risk of moisture soil was at B level,indicating that the ecological damage was moderate.The potential ecological risk of brunisolic soil were at A level,indicating that the ecological damage was not serious; while the potential ecological risk of brown earth was at B level,indicating that the ecological damage was moderate.The potential ecological risk degrees of heavy metals were ranked in order of Cd＞Pb＞Cu＞Zn.Results based on index of geoaccumulation showed that the potential ecological risks of heavy metals were ranked in order of Pb＞Cu＞Zn＞Cd.