城市中不同功能区土壤重金属含量的环境质量评价——以宿州市为例

Environmental Quality Assessment of Soil Heavy Metal Content in Different Functional Areas in Cities——A Case Study of Suzhou City

为掌握城市不同功能区土壤重金属的空间分布规律,以宿州市为例,考虑市区环境复杂性,将其划分为政务新区、经济开发区、老城居民区、北关工业聚集区四个不同功能区,布置39个采样点。样品测试结果表明,检测的Cu、Pb、Zn、Cd、Ni、Cr、Hg、As这8种重金属元素的含量分别超出安徽省背景值246.35%、44.15%、31.76%、342.86%、43.6%、37.78%、580%和75.62%。从地质累积指数角度评判来看,宿州市政务新区与经济开发区的污染较轻,老城居民区和北关工业聚集区污染较重,与交通车流量、居住时间和工业发展关系密切。

In order to understand the spatial distribution of soil heavy metals in different functional areas of the city,taking Suzhou City as an example,considering the complexity of urban environment,it was divided into four function⁃al areas,namely new administrative area,economic development zone,residential area of old city and Beiguan indus⁃trial agglomeration area,with 39 sampling points.The results showed that the contents of Cu,Pb,Zn,CD,Ni,Cr,Hg and as exceeded the background values of Anhui Province by 246.35%,44.15%,31.76%,342.86%,43.6%,37.78%,580% and 75.62%,respectively.From the perspective of geological accumulation index,the pollution in the new government area and economic development zone in suzhou was relatively light,while the pollution in the old residential area and the industrial gathering area in beiguan was relatively heavy,which was closely related to the car⁃flow and industrial development.