城市表层土壤重金属污染的空间分布特征分析

摘要

The contents of eight heavy metals,such as As,Cd,etc.,in surface soils of living quarters,industrial area,mountain area,trunk road area and public greenbelt were analyzed to find the pollution level of different areas by heavy metal.Using the waste load index method,the main factors that affected the soil heavy metal were checkout and the main charateristics of heavy metal pollution in different area were determined.Using the kriging interpolation method,the optimal unbiased estimation about heavy metal content was interpolated,and the spatial distribution of heavy metal pollution was analyzed,then the space distribution features of surface soil heavy metal were revealed.%分析了某城市城区表层土壤中的As、Cd等8种重金属在生活区、工业区、山区、主干道路区及公园绿地区的含量水平,得出了不同区域重金属的污染程度；运用污染负荷指数法对影响土壤各重金属主要因子进行分析,确定不同区域重金属污染的主要特征；建立重金属污染物的传播模型,运用Kriging插值法对重金属含量进行最优无偏估计插值,对重金属污染的空间分布进行分析,揭示了城市表层土壤中重金属含量的空间分布特征.