摘要
随着城市化和工业化进程的加快,我国城市及其周边目前已遭受到明显的重金属污染,本文着重研究了天津17个主要公园土壤重金属的污染特征。2007年10月采集公园土壤样品,利用ICP-MS分析土壤重金属的含量。研究结果表明:Cu、Zn、Ni、Cr、Cd和Pb的平均质量分数分别为36.57mg·kg-1,116.56mg·kg-1,30.15mg·kg-1,51.04mg·kg-1,0.25mg·kg-1和31.62mg·kg-1。以天津市土壤背景值为评价标准,天津公园土壤重金属污染属于中度污染和轻微生态风险。重金属主要污染因子为Cd,其次是Pb、Zn和Cu。天津中环线以内区域公园土壤重金属污染较中外环线之间相比较重。不同行政区划区域公园土壤重金属污染从综合污染指数来看,由重到轻的顺序为:红桥区>河北区>河东区>南开区>河西区>和平区>北辰区;从潜在生态指数评价来看,由重到轻的顺序为:红桥区>河北区>河东区>南开区>河西区>北辰区>和平区。
Soils taken from 17 parks in Tianjin were studied.The heavy metal concentrations were analyzed by ICP-MS.The results showed that the average concentrations of Cu,Zn,Ni,Cr,Cd and Pb were 36.57 mg·kg-1,116.56 mg·kg-1,30.15 mg·kg-1,51.04 mg·kg-1,0.25 mg·kg-1and 31.62 mg·kg-1.Compared with soil background values of heavy metal in Tianjin,the results of heavy metal pollution assessment indicated that the soil heavy metal of park in Tianjin has reached a medium level and a slight ecological risk, respectively.The contamination of Cd was most serious,the next in order being Pb,Zn and Cu.The heavy metal pollution of park in middle loop line regional was more seriously than between the middle loop line and outer loop line.The ranking order of compre-hensive pollution index was Hongqiao DistrictHebei DistrictHedong DistrictNankai DistrictHexi DistrictHeping District Beichen District.The ranking order of potential ecological risk index was Hongqiao DistrictHebei DistrictHedong District Nankai DistrictHexi DistrictBeichen DistrictHeping District.
出处
《生态环境学报》
CSCD
北大核心
2010年第5期1097-1102,共6页
Ecology and Environmental Sciences
基金
中央级公益性科研院所基本科研业务费专项资金(农业部环境保护科研监测所)资助项目
关键词
土壤重金属
公园
污染评价
空间分析
soil heavy metal
park
pollution assessment
spatial analysis
