三峡库区重庆段淹没区土壤重金属分布及评价

三峡库区重庆段淹没区土壤重金属含量均低于国家土壤环境标准三级,其中铜含量范围为10.7~80.2mg/kg,均值为37.0 mg/kg;铅含量范围为14.6~51.8mg/kg,均值为29.3mg/kg;锌含量范围为47.5~93.3mg/kg,均值为72.7mg/kg;镉含量范围为0.084~0.765mg/kg,均值为0.321mg/kg;汞含量范围为0.032~0.204mg/kg,均值为0.059mg/kg;砷含量范围为4.63~12.7mg/kg,均值为8.65mg/kg。三峡库区淹没区土壤主要受镉铜污染和铅镉污染。

Heavy Metals Distribution of Soils in Water-level-fluctuating Zone of the Three-Gorges Reservoir

The heavy metals level of soils in water-level-fluctuating zone of the ThreeGorges Reservoir is lower than Tertiary Soil Quality Standard.According to the research,the mean Cu concentration is 37.0mg/kg,ranging from 10.7 to 80.2mg/kg;mean Pb concentration is 29.3mg/kg,ranging from 14.6 to 51.8mg/kg; mean zinc is 72.7mg/kg,ranging from 47.5 to 93.3mg/kg;mean cadmium concentration is 0.321mg/kg,ranging from 0.084 to 0.765mg/kg;mean mercury concentration is 0.059mg/kg,ranging from 0.032 to 0.204mg/kg;mean arsenic was 8.65mg/kg,ranging from 4.63 to 12.7mg/kg.The pollution type of soils in water-level-fluctuating zone is cadmium-corper and plumbum-cadmium.