弥河流域农用地土壤重金属含量特征及其影响因素

[目的]探讨山东省弥河流域农用地土壤重金属含量及其影响因素。[方法]采用实地调查和室内分析相结合的方法,用电感偶合等离子发射光谱仪(ICP-AES)分别测定了所采集样点土壤的重金属Cr、Cu、Ni、Zn、Mn和V的含量,并用数理统计法进行了分析。[结果]弥河流域农用地土壤中的重金属Cr、Cu、Ni、Zn、Mn和V含量在空间上存在显著差异,成土母质是形成这种差异的主要原因,人类活动未对重金属含量产生明显影响。土壤未受到重金属Cr、Cu、Ni、Zn、Mn和V的污染,符合国家土壤环境质量二级标准,符合绿色食品产地规定的土壤质量环境要求,属于清洁流域。[结论]部分样点的Cr、Cu、Ni、Zn和Mn的含量已经高于该区域的背景值,存在一定的健康风险,应当引起重视。

Study on Heavy Metal Content Character in Agricultural Soil in Mihe Basin and Its Influencing Factors

[Objective] The study aimed to discuss the heavy metal content in agricultural soil in Mihe basin of Shandong Province and its influencing factors.[Method] Combined the field investigation with the laboratory test,the content of heavy metals such as Cr,Cu,Ni,Zn,Mn and V in soil collected from sample spots were measured by ICP-AES and analyzed by mathematical statistics.[Result] The contents of heavy metals such as Cr,Cu,Ni,Zn,Mn and V in agricultural soil in Mihe basin had significant spatial difference.The main reason for the difference was the parent materials of soil and human activities had no significant influences on the contents of heavy metals.The soils were not polluted by heavy metals of Cr,Cu,Ni,Zn,Mn and V,which accorded with the national secondary standard of soil environment quality and the environment demand of soil quality for producing area of green food.So the Mihe basin belonged to clean basin.[Conclusion] The contents of heavy metals such as Cr,Cu,Ni,Zn and Mn in some sample spots were higher than the background concentration in this region and there was some health risks,so it should be paid more attention.