【摘要】 测定南水北调东线工程迂境农田土壤中汞、镉、砷、铜、铅、铬、锌、镍等元素的含量及阳离子交换量 (CEC) ,并通过回归分析测知汞与其它元素无显著相关性 ,说明汞并非伴生元素 ,而其它元素的增加与其余元素的减少有显著相关性 ;聚类分析结果 ,可根据不同聚类分析数字距离 ,将 9个指标分为三类、四类、五类 ,根据每一类中某元素含量对该类中其他元素进行预测 ,为工程运行后 ,作为农田土壤重金属元素的监控和评价的依据。按照土壤污染分级 ,该研究区内土壤各元素除砷、铅、镍有极少轻污染外 ,基本属于清洁区更多还原

【Abstract】 The contents of Hg?Cd?As?Cu?Pb?Cr?Zn?Ni and CEC were determined in field soil of eastern line project for Water-allocating from south to north. The multiple regression analysis indicated that no remarkable correlation in Hg and other elements;it also showed that Hg is not an associated element, and it was closely related with the increase of some elements and the decrease of other elements. The clustering analysis results suggested that according to numerical distance of varying clustering analysis, nine indexes were divided in to three kinds?four kinds and five kinds.The content of each kinds coulolbe predectermined based the test on other element.It provids basis for supervision & evaluate of heavy metal elements in field soil after project. It is a clear zone in the investigation exclpt that there are minor pollution of As.pb and Ni according to soil pollution level.更多还原