垃圾堆放场土壤重金属分布特征及污染评价

Vertical Distribution Characteristics and Pollution Assessment of Heavy Metals in Soil Around Domestic Waste Dump

土壤是地球表层生态系统重要的组成部分,也是人类赖以生存的重要资源,土壤污染会影响人类健康。本研究以某高校园区生活垃圾堆放场为研究区,分析其土壤重金属的垂向分布特征,并进行重金属污染评价,探究不同重金属之间的相关性,并对重金属进行聚类分析。结果显示,重金属元素中Cd、As、Pb、Zn分别出现不同程度的富集,其中Cd元素最大值为背景值的46.88倍,属于严重污染,Pb元素部分区域存在轻微污染,其余重金属均不存在污染。Zn、As和Cr在深度上的含量变化具有一定的关联性,污染源相似;Cr、Ni、Pb的含量呈现相同幅度的上升趋势,垂向分布特征表现出了较强的关联性。

Soils play a vital role in human life.But because of soil pollution,they were also harmful to human health.In the study,a domestic waste dump site of a university is chosen as the research area.The contents,pollution assessment and correlations among the heavy metal at different depths were investigated.The results indicated that the enrichment degree of Cr,Cu,Ni and Zn was relatively light.Among them,the maximum value of the Cd element is 46.88 times the background value,which is a serious pollution;There is slight pollution in some areas of Pb elements;The content changes of Zn,As and Cr in depth have a certain correlation,and the pollution sources are similar;The contents of Cr,Ni and Pb showed the same amplitude of upward trend,and the vertical distribution characteristics showed a strong correlation.