典型污染区域土壤重金属空间分布特性及其影响因素  

Research of influencing factors and spatial variability of soil heavy metals in typical polluted area

作　　者：李锐[1,2] 宗良纲[1] 王延军[1] 沈振国[3] 

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095 [2]宜兴市农林局检测中心,江苏宜兴214206 [3]南京农业大学生命科学学院,江苏南京210095

出　　处：《南京农业大学学报》2009年第1期67-72,共6页Journal of Nanjing Agricultural University

基　　金：江苏省自然科学基金重点项目(BK2006711-1);江苏省社会发展项目(BS2003029)

摘　　要：应用地统计分析、相关分析、主成分分析对苏南某废弃的冶炼厂附近土壤重金属(Cd、Cu、Pb)的含量、空间分布及其影响因素进行了研究。结果表明,在研究区内Cd污染严重,其平均含量为6.91 mg.kg-1,Cu、Pb为局部污染,其平均含量分别为53.2和83.6 mg.kg-1。Cd、Cu、Pb均呈现中等的空间相关性且变异均表现在东南—西北方向。Cd、Cu的空间变异以人为因素影响为主,而Pb的变异与土壤母质、地形的关系较大。基于ArcGIS地统计学分析工具与主成分分析能够很好地反映土壤重金属的空间变异情况及其影响因素。The geostatistical analysis, correlation analysis and principle component analysis were used to study the contaminative situation of soil near an abandoned smeltery, by heavy metal contents （Cd, Cu and Pb）. It could be concluded that the soil was heavily contaminated by Cd whose average content reached 6. 91 mg.kg^-1 , and it was partially contaminated by Cu and Pb, whose average value were 53.2 mg.kg^-1 and 83.6 mg.kg^-1 respectively. The spatial correlations of Cd, Pb and Cu were all moderate and their directional variation was from southeast to northwest. Cd and Cu variational levels were mostly influenced by anthropogenic activities comparatively, but variation of Pb was mainly attributed to soil parent material and topography. The method based on the Geostatistical Analyst in AreGIS can exactly reflect the character of spatial variability and the sources of heavy metals.

关 键 词：典型污染区域 地统计分析 重金属 主成分分析 

分 类 号：X53[环境科学与工程—环境工程]