河北省无公害果品基地土壤重金属含量分析及土壤环境评价研究

摘要：本文在河北省选取12个县的无公害果品产地作为土样采集点，分析土壤中重金属Hg、As、Pb、Cr、Cd的含量及其污染状况，利用SPSS软件分析重金属元素间的相关性；以《土壤环境质量标准》GB15168—1995二级标准为评价标准，采用单项污染指数法和内梅罗综合污染指数法相结合的方法，对研究区土壤环境质量进行评价。结果表明：河北省无公害果品生产基地土壤污染综合评价值范围在0.085～0.991之间，等级范围在Ⅰ～Ⅲ级之间，其中８个县评价等级为Ⅰ级；１个县为Ⅱ级；３个县为Ⅲ级，各重金属之间除Pb与Cd在0.05水平下呈显著负相关性，其它重金属元素之间没有显著相关性。研究区土壤重金属综合污染评价状况为安全级，土壤中重金属元素含量状况可以满足无公害食品生产基地的建设要求。

Study on the Content Analysis of Soil Heavy Metals and Soil Environment Assessment in Nuisance Free Fruits Production Base in Hebei province

Abstract: Based on the investigation and sampling analysis of the soil environmental quality among 12 counties in Hebei province, this paper studied the content of soil heavy metals, such as Hg, As Pb, Cr and Cd., and their pollution , analyzed correlations of each heavy metal by using SPSS .Soil Environmental Quality Standard II and the methods of single factor pollution index and Nemerow integrated index were adopted to evaluate the soil environmental quality in the study area. The results showed that the value range of comprehensive evaluation in soil pollution was 0.085～0.991, The grade range was Ⅰ～Ⅲ,eight counties are determined grad Ⅰand one county is determined grad Ⅱ and three counties are determined grad Ⅲ. the heavy metal elements have no remarkable correlation, Except Pb and Cd. In summary, the results of assessment indicated that the soil quality was safety, the standard of content of soil heavy metals in study region can meet the requirements in Green Food Production Base.