江都市土壤重金属分布特征及污染评价

江都市土壤重金属含量分布及污染现状评价结果显示,江都市土壤环境质量总体良好,但局部地区土壤污染严重,其中通扬运河以北地区土壤环境质量优于通扬运河以南地区。土壤中镉、汞、锌含量空间分布不均匀,局部土壤含量超过国家土壤二级标准,由点源污染所致,其中镉、汞为江都市土壤主要致污染因子,导致局部土壤严重污染。建议对不同污染程度土壤土地采取不同利用方式,需进行合理调整规划。

Evaluation on distribution and pollution of soil heavy metals in Jiangdu City

The heavy metals in surface soil layers in Jiangdu and their spatial distribution were depicted in the text, and the soil heavy metal pollution status was evaluated and the pollution source and its way into the soil environment were discussed. The study showed that the general environmental quality for the soils is fine with severe pollution in local areas, and the soils to the north of Tongyang Canal excel those of south Tongyang Canal. The spatial distribution of Cd, Hg, Zn is uneven, some exceed class two national standard for soils, resulted by point pollution, in which, Cd and Hg are the major pollution genetic factors. The authors suggested a multiply way of developing the soils, inclusive of a rational arrangement.