摘要
以盐城海岸带为研究区,分别采用地质累积指数法、内梅罗指数法和潜在生态危害指数法对土壤重金属污染进行风险评价,分析不同方法在评价同一研究区时结果的差异性。结果表明,研究区Cr、Ni、Zn、Cd质量浓度平均值超过盐城海岸带环境背景值。地质累积指数法显示研究区土壤重金属在中度污染到强污染;内梅罗指数法显示研究区土壤重金属为重度污染;潜在生态危害指数法显示研究区土壤重金属处于中度潜在生态危害程度。3种方法评价结果的严重程度为:内梅罗指数法>地质累积指数法>潜在生态危害指数法。3种评价方法均有一定缺陷与局限性,相对于单一方法的污染评价,采用多种方法评价土壤重金属污染可使评价结果更加客观。
The potential risks of soil heavy metals in Yancheng coastal zone was evaluated by geoaccumulation index,Nemerow index,and potential ecological risk index separately.The difference of evaluation results of 3methods was analyzed.The results showed that the average concentration of Cr,Ni,Zn and Cd exceeded background value of Yancheng coastal zone.The geoaccumulation index indicating the moderate or strong heavy metals pollution in soil of Yancheng coastal zone,Nemerow index showed that the soil heavy metals in Yancheng coastal zone was severely polluted,and the potential ecological risk index showed soil in study area was in the moderate degree of potential ecological risk.The evaluation results of Nemerow index was more severely than geoaccumulation index and potential ecological risk index.Each method had its limitations in actual application,while integrating various evaluation methods could help researcher got more objective results of the heavy mentals potential risks.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2016年第12期43-48,共6页
Environmental Pollution & Control
基金
国家重点基础研究发展("973计划")项目(No.2013CB430405)
国家科技支撑计划子课题(No.2012BAC07B03)
