南京市土壤重金属污染调查评价

Investigation and Assessment on Pollution of Soil Heavy Metals in Nanjing

在南京地区总共采集土样36个,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的污染状况作了初步评价。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。污染原因有:工矿企业废物的排放;各类肥料和农药的施用;生活垃圾的农用。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,说明人为影响是土壤重金属污染的主要原因。

On the base of investigation of content of soil heavy metals in Nanjing region,the pollution status of soil heavy metals, which include Pb, Zn, Cr, Hg and Cu, were evaluated according to the Standard of Soil Environment Quality (GB 15168-1995).The result showed that the pollution of soil metals in Nanjing suburb was mainly on Hg and Zn, and the most seriously polluted area was around Jiangning region. The analyses of the reasons of soil pollution showed that it was mostly caused by the wastes of industries and mineral factories, or by the using of fertilizers and pesticides, or by reutilization of living garbage. The vegetable land and the paddy fields among the three kinds of lands investigated,are more seriously polluted and manmade disturbance is the main reason of soil heavy metal pollution.