贵阳城区土壤重金属的空间分布特征及污染评价

以贵阳市区为研究地点,采集贵阳城区工业区、交通区、商业区、居民区、文教区、公园6个类别共89个采样点的表层土壤,分析土壤重金属在不同区域的分布特征,并分析其可能来源。最后对重金属污染状况进行总体评价。结果表明:重金属在土壤中已有一定程度的积累,在工业区、商业区、居民区的积累程度比较高。As的污染较为严重,达警戒水平,Cu、Ni、Zn在居民区的污染比较严重,均达警戒水平,Cu、Ni、Zn在工业区的污染最为严重,达轻度污染以上。

The distributive character and pollution assessment of heavy metals in urban soil of Guiyang

This study focused on characterization of heavy metals in the soil of the city of Guiyang,89 surface soil samples were collected from 6 land-use types, such as traffic areas, industrial area, commercial area, residential area, education and historical relics, public area. Distribution characterization and possible sources of heavy metals of Hg, Cd, As, Pb, Cr, Cu, Ni and Zn were analysised, and The overall assessment of heavy metals pollution were analysied. The results indicated that the surface soil was contaminated by heavy metals, especially in industrial area, commercial area and residential area. The concentration of As was high and should be paid more attention, the concentration of Cu ,Ni and Zn in residential area was higher and should be paid more attention, however, the concentration of Cu,Ni and Zn in industrial area was highest and above light pollution.