都龙矿区土壤与植物镉、锌污染的研究

对受Cd、Zn污染的小白河流域河流底泥、尾矿土、水稻土壤及植物进行采样分析,结果表明:底泥、尾矿土、水稻土已受到Cd的严重污染,底泥和水稻土Zn含量已超出二级土壤环境质量标准。利用Hakanson潜在生态危害指数法对小白河流域土壤重金属生态危害评价,表明各采样点的重金属污染潜在生态危害都很强,主要原因是Cd含量过高。生长在土壤污染区的植物Cd、Zn含量显著较高,即植物在土壤污染区受污染严重,应采取措施对污染区域进行综合防治。

Study on Cadmium & Zinc Pollution of Soils and Plants in Dulong Mine

The analysis on samples of sediments,tailings,rice soils and plants in Xiaobai River polluted by cadmium and zinc were tested.The results showed that soil sediments,tailings and rice soils all had been severely polluted by Cd,and the Zn content of rice soils and sediments were beyond the standard of soil environmental quality level Ⅱ.The Lars Hankanson’s method was used to assess potential ecological risk of the heavy metals in Xiaobai River.The assessment results showed that each sample point was high with potential ecological risk,which was caused by high levels of Cd.In addition,Zn and Cd contents of plants growing in contaminated soils were much more than those in no polluted soils.It was indicated that the plants were severely polluted in contaminated soils.Some measures should be adopted to integrate control for the polluted area.