贵阳市土壤重金属污染及其潜在生态风险评价  

The Heavy Metal Pollution in Urban Soils of Guiyang City and Their Potential Ecological Hazard Assessment

作　　者：武永锋[1] 刘丛强[1] 涂成龙[1] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室

出　　处：《矿物岩石地球化学通报》2007年第3期254-257,共4页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：中国科学院重要方向项目(KZCX3-SW-140);国家重点基础研究发展规划项目(2006CB403200)

摘　　要：以贵阳市区土壤为对象,研究不同功能区土壤中重金属(Cu、Pb、Zn、Cr和Cd)污染的特征,采用Hakanson潜在生态危害指数法评价了土壤中重金属的潜在生态危害。结果表明,贵阳市城区土壤重金属含量差异较大,变化幅度均高于35%。产生潜在生态危害的重金属主要是Cd,已达到中度生态危害水平,Cu、Pb、Zn、Cr显示轻度生态危害水平。贵阳市潜在生态危害综合指数(RI=90.86),表明土壤重金属污染达轻度生态危害。不同功能区潜在生态危害程度的顺序依次是工业区>公园>交通区>郊区耕地>居民区。The soil samples of different functional zones in Guiyang city are collected for studying the characteristics of the heavy metal（Cu,Pb,Zn,Cr,Cd） pollution in soils.The potential ecological hazard index method by Hakanson has been applied to assess potential ecological hazard caused by the heavy metal pollution in urban soils.The results show that the contents of Cu、Pb、Zn、Cd and Cr in urban soils of Guiyang City varied significantly with over 35% variation extent.The potential ecological hazard was mainly resulted from Cd in urban soils as it has caused intermediate level ecological risk,while other heavy metals（Cu,Pb,Zn,Cr） have only caused light level ecological risk.The potential ecological hazard index（RI） of 90.86 for the urban soils in Guiyang City indicates that the heavy metal pollution of the urban soils in Guiyang City resulted in light level ecological hazard.The levels of potential ecological hazard for soils in different functional zones are subsequently decreased from the industrial area,the urban park,the transportation area,the farmland,to the residence area.

关 键 词：城市土壤 重金属污染 潜在生态风险 土壤评价 

分 类 号：X825[环境科学与工程—环境工程]