北京市不同功能区土壤重金属污染探究

Exploration on the Pollution of Topsoil Heavy Metal in the Different Areas of Beijing

采用调查及数据测定分析的方法,探究北京市不同功能区土壤重金属Cu、Ni、Cr、Cd、Pb、Zn的分布,并对其污染程度进行综合评价。结果表明:北京市土壤中Cu、Pb、Cd等3种重金属元素存在不同程度的污染,其中以Cd污染最为严重。不同功能区的污染状况也不同,尤以高速公路区和交通繁忙区比较严重。用综合污染评价方法得出土壤重金属污染的顺序为高速公路区>交通繁忙区>工业区>居民区>城市公园休闲区。

Measured using surveys and data analysis methods,the urban topsoil in different areas of Beijing were taken for this study to analyze the present situation of heavy metals(Cu,Ni,Cr,Cd,Pb,Zn),and the enrichment situation of heavy metals were investigated and evaluated.The results showed that: the three metals(Cu,Pb,Cd) all polluted the topsoil by different degree in Beijing.The contamination of cadmium(Cd) was the most serious.The contamination situation was different in different zones,especially in the Speedway Area and Heavy Traffic Area.The ranking order of contamination situation was Speedway Area > Heavy Traffic Area > Industrial Zone > Residential Area > City Parks and Recreation Zones.