西南某化工园区土壤重金属污染风险研究  

Study on Pollution Risk of Soil Heavy Metals in a Chemical Industrial Park of Southwest China

作　　者：周炼川 余海 李雨桐 刘坤 程敏 李洪刚 杨杉 ZHOU Lianchuan;YU Hai;LI Yutong;LIU Kun;CHENG Min;LI Honggang;YANG Shan(Chongqing Academy of Ecology and Environmental Sciences,Chongqing,401147,China;Southwest Branch of Chinese Academy of Environmental Sciences,Chongqing,401147,China)

机构地区：[1]重庆市生态环境科学研究院,重庆401147 [2]中国环境科学研究院西南分院,重庆401147

出　　处：《环境影响评价》2023年第2期99-103,108,共6页Environmental Impact Assessment

基　　金：国家重点研发计划“长江经济带化工园区场地污染防治技术集成与工程示范”(2019YFC1804000)。

摘　　要：采用富集因子评价法、地累积指数法、潜在生态危害指数法和PCA/FA分析法,研究了西南某化工园区土壤重金属污染特点和生态风险。结果表明:园区土壤重金属浓度平均值大小顺序依次为Zn>Ni>Cu>Pb>Hg>As>Cr>Cd, Hg元素点位超标率为14.3%,其余元素均未超过筛选值。除Hg和Cr元素不遵循正态分布,其余元素浓度基本符合正态分布规律。Hg元素地累积指数平均值为7.70,其潜在生态风险指数平均值为13 874.40,生态风险属极强水平。PCA/FA分析也表明,Hg元素权重为0.205,是8类重金属中权重最高的污染物,可能是由于人为活动造成Hg元素浓度超标导致。To understand the current characteristics and pollution risk of heavy metals in a chemical industrial park of southwest China,the surface soil of the park was selected as the research object,by using the Enrichment Factor evaluation method,ground accumula-tion index method,potential ecological hazard index method,and PCA∕FA analysis.The results showed that the average size of soil heavy metal concentrations in the park was Zn>Ni>Cu>Pb>Hg>As>Cr>Cd.The point exceeding standard rate of Hg was 14.3%,with no other elements exceed the filter value.Except for Hg and Cr,which did not follow the normal distribution,the concentrations of other elements basically conformed to the normal distribution rule.The ground accumulation index of Hg was 7.70,respectively.Meanwhile,the mean value of potential ecological risk index for Hg was 13874.40,whichindicated the ecological risk was extremely strong.PCA∕FA analysis also showed that the weigt of Hg was 0.205,which was the highest weight among the eight types of heavy metals,which may be mainly caused by excessive Hg with human activity.

关 键 词：化工园区 重金属 污染特点 生态风险 

分 类 号：X5[环境科学与工程—环境工程]