以背景值作为参比值，各采样地土壤重金属潜在生态危害评价结果如表6所示，

以背景值作为参比值，各采样地土壤重金属潜在生态危害评价结果如表6所示，单一重金属潜在生态危害评价结果，周村区的6种重金属的Ei评价结果均为低危害等级，各区的Ei均为Cd最大，且远大于其他元素，主要原因是Cd的毒性系数为30,远大于其他几个重金属元素，毒性系数间接反应了它对环境以及人类的危害程度。多种重金属潜在生态危害评价结果，周村区的RI最小，淄川区的RI最大，张店区与博山区的RI接近，评价结果均为中等危害等级，具体顺序为淄川区>张店区>博山区>周村区。以上结果表明，与背景值相比较研究区域的土壤重金属已存在一定的潜在生态危害风险。

以背景值作为参比值，各采样地土壤重金属潜在生态危害评价结果如表6所示，单一重金属潜在生态危害评价结果，周村区的6种重金属的Ei评价结果均为低危害等级，各区的Ei均为Cd最大，且远大于其他元素，主要原因是Cd的毒性系数为30,远大于其他几个重金属元素，毒性系数间接反应了它对环境以及人类的危害程度。 多种重金属潜在生态危害评价结果，周村区的RI最小，淄川区的RI最大，张店区与博山区的RI接近，评价结果均为中等危害等级，具体顺序为淄川区>张店区>博山区>周村区。 以上结果表明，与背景值相比较研究区域的土壤重金属已存在一定的潜在生态危害风险。

Taking the background value as the reference value, the potential ecological hazard assessment results of soil heavy metals in each sampling area are shown in Table 6. According to the potential ecological hazard assessment results of single heavy metal, the EI assessment results of six heavy metals in Zhoucun District are all of low hazard level, and the EI of each district is CD, which is the largest and far greater than other elements. The main reason is that the Toxicity Coefficient of CD is 30, The Toxicity Coefficient indirectly reflects its harm to the environment and human beings. The RI of Zhoucun District was the smallest, Zichuan District was the largest, and Zhangdian District was close to Boshan District. The evaluation results were all in the medium level, and the specific order was Zichuan District > Zhangdian District > Boshan District > Zhoucun District. The above results show that compared with the background value, there is a certain potential ecological risk of heavy metals in the soil of the study area.<br>