商丘城市土壤重金属污染及潜在生态风险评价研究  

Heavy Metal Pollution and Potential Ecological Risk Assessment in Urban Soils of Shangqiu City

作　　者：张妍[1,2] 李玉嵩 谷志云[1,2] 李胜昌[1,2] Zhang Yan;Li Yusong;Gu Zhiyun;Li Shengchang(Henan Institute of Geological Survey,Zhengzhou 450001,China;Henan Geochemical Ecological Restoration Engineering Research Center,Zhengzhou 450001,China;No.2 Institute of Geo-environment Survey of Henan,Zhengzhou 450001,China)

机构地区：[1]河南省地质调查院,河南郑州450001 [2]河南省地球化学生态修复工程技术研究中心,河南郑州450001 [3]河南省地矿局第二地质环境调查院,河南郑州450001

出　　处：《环境科学与管理》2019年第7期186-190,共5页Environmental Science and Management

基　　金：中国地质调查局项目“河南商丘地区多目标地球化学调查”(12120113000900)

摘　　要：在商丘市共采样表层土样70件,分析测试了8种重金属含量;用PLI和RI等方法,对土壤中重金属污染程度和潜在生态风险水平进行了评价;用主成分法对污染成因和来源进行了分析。结果表明:(1)8种重金属元素PLI平均值为1.19,总体属轻度污染;RI的平均值为218,属中等生态危害水平;Cd、Hg为主要污染因子。(2)Cd、Cu、Hg、Ni、Pb、Zn为人为因子,主要来源于农业生产、工业废物和交通排放;As、Cr、Ni为自然源因子,受成土母质影响。Seventy topsoil samples were collected from Shangqiu City,China,and then the concentrations in the samples were measured by standard methods.Soil pollution levels and potential ecological risks of the heavy metals were assessed using the pollution load index(PLI) and potential ecological risk index (RI),respectively.The geneses and sources of soil heavy metals were indicated by the principal component analysis(PCA).The results showed that the average PLI of the eight elements is 1.19,which is light polluted.The average RI is 218,which belongs to the middle ecological risk.Cd and Hg are the primary ecological risk factors.Cd,Cu,Hg,Ni,Pb and Zn were called anthropogenic factors and came from agricultural activities,industrial wastes and transport emissions,but As,Cr and Ni were explained as natural factors and their contents depended upon the parent materials of soil.

关 键 词：城市土壤 重金属 潜在生态风险 来源解析 

分 类 号：X826[环境科学与工程—环境工程]