城市化进程中的南京市土壤重金属污染调查

Investigation and Assessment on Pollution of Soil Heavy MetalsDuring Urbanization Process of Nanjing City

以《土壤环境质量标准》(GB15168 1995)二级标准为评价标准,对南京市土壤重金属Pb、Zn、Cr、Hg、Cu的污染状况作了调查评价.研究发现:南京近郊重金属污染以汞和锌为主,江宁县附近为污染重区,并对污染的原因进行了分析研究.在评价的3种主要土地利用类型中污染比较严重的是受人为影响比较大的菜地和水田.也从重金属污染的时间变化中说明随着南京城市化的进程的发展,南京土壤重金属含量在增加,城市化加剧了土壤污染.

The pollution of soil heavy metals, including Pb, Zn, Cr, Hg and Cu, is assessed according to the Standard of Soil Environment Quality (GB15168-1995). The result shows that main pollutants of soil heavy metals in Nanjing Suburb are Hg and Zn, and the most seriously polluted area is around Jiangning county. The paper analyzes the reasons of soil pollution. The vegetable land and the paddy fields suffered man-made affection more seriously among the three land use types of assessment are more seriously polluted. It is also explained that the effect of Urbanization to the content of soil heavy metals.