摘要
应用空间插值方法研究了上海城市土壤和地表灰尘中重金属污染的含量水平和空间分布特征,并采用潜在生态危害指数法对样品中重金属的潜在生态危害进行了评价.结果表明,上海城市土壤和地表灰尘中的重金属均极显著地超过上海土壤背景值,其中土壤和灰尘中的铅分别是背景值的37倍和174倍.城市土壤和地表灰尘的潜在生态危害指数分别为244.69和1004.03,分别达到中等生态危害和很强生态危害.
Spatial interpolation technique was applied to study the content level and the spatial distribution character of heavy metal pollution in soil and surface dust of Shanghai City. Geochemical maps of heavy metals （Cr, Cu, Pb and Zn） in the soil and surface dust were produced based on and adopting Hakanson suggested potential ecological risk index technique to assess the potential ecological risk of heavey metal in soil and surface dust, and utilizing geographical information system （GIS） technique to drawn up the spatial distrubution map of assessment results. The soil and surface dust heavy metal pollution was serious in Shanghai City, all greatly exceeded the Shanghai soil background value, especially the average content of Pb in soil and surface dust reached 925.85 mg/kg and 4415.98 mg/kg respectively, exceeding the background value 37 times and 174 times; the potential ecological risk indexes of urban soil and surface dust were 244.69 and 1004.03, respectively, reaching respectively the middle ecological risk and very strong ecological risk.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2007年第5期613-618,共6页
China Environmental Science
基金
国家自然科学基金资助项目(40671171
40131020)
中国博士后基金资助项目(2005037135)
关键词
重金属
潜在生态危害
空间插值
城市土壤
地表灰尘
heavy metal
potential ecological risk
spatial interpolation
urban soil
surface dust
