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OALib Journal期刊
ISSN: 2333-9721
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南京市不同功能区路域表土重金属污染评价及相关性分析
DOI: 10.3969/j.issn.1000-2006.2014.06.013, PP. 65-71
Keywords: 路域土壤,重金属污染,城市功能区,南京
Abstract:
为调查南京市路域表土重金属污染状况,在南京市5个功能区布设了1500个监测点,分析测定重金属cr、cd、ni、pb、zn的含量,并对其进行评价和相关性分析。结果表明,5个功能区均有不同程度的重金属富集。按照南京市土壤环境背景值标准进行单项污染指数法评价得出:5个功能区均存在cd重度污染;cr、zn轻度污染(在风景名胜区不存在zn污染);无ni污染;在交通枢纽区、工业区及科教生活区均存在pb轻度污染,其他功能区无pb污染。各区域内梅罗综合污染指数、潜在生态危害指数由高到低依次为:交通枢纽区、工业区、科教生活区、商业区、风景名胜区。5个功能区综合污染均达重度,且除cd生态危害水平极强外,cr、ni、pb、zn均为轻微危害水平。不同功能区5种重金属元素彼此间相关性程度不同,表明各区重金属污染来源不同。
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