【摘要】 对长春市朝阳区一些重点功能区的绿地土壤重金属污染状况进行调查研究,在小区、学校、广场、公园、街路设计15个土壤样区。对各样点土壤的pH值、有机质含量、速效N、速效P、速效K以及重金属元素Cu、Zn、Pb、Cd的含量进行了测定。采用单项污染指数法和内梅罗综合污染指数法来评价土壤重金属污染程度。结果表明,样区C1(南湖广场)、E1(解放大路)、E2(开运街)的土壤重金属Cu单项污染指数已受到轻污染,最大值已达到2.03;其他样区的各项污染因子为潜在污染;内梅罗综合污染指数样区土壤均受到轻度污染,说明重金属污染主要来源大规模的企业,同时也说明非重大企业的重金属污染也不可忽视。更多还原

【Abstract】 To investigate the soil heavy metal pollution status of several important function zones in Chaoyang district,Changchun city,15 soil samples were collected from community,schools,squares,parks and street.Analyses on physicochemical properties including pH,soil organic matter,available N,available P and available K were conducted.The content of heavy metals(Cu,Zn,Pb,Cd) in soil samples was determined by atomic adsorption spectrophotometry.Adopting the single factor index and Nemerow multi-factor index methods,the pollution indices were calculated to assess the pollution extent.Cu pollution index of sample area C1(Nanhu square),E1(Jiefang road) and E2(Kaiyun street) were higher and the maximum of them were 2.03,which showed that these areas were in the status of light Cu pollution.All pollution factors in other areas were potential.The evaluation result of Nemerow synthetic pollution index method indicated that all soil in sample areas was slightly polluted.The pollution sources of heavy metals were mainly large-scale enterprises,then some ordinary enterprises.更多还原