南京莫愁湖沉积物中重金属污染研究

In order to investigate the degree of heavy metal pollution in the sediment of Lake Mochou, Nanjing, the concentrations of heavy metals (Cd、Cr、Cu、Mn、Ni、Pb、Zn) were measured using ICP-AES. At the same time, index of geoaccumulation (Igeo) was calculated to assess the pollution degree of the heavy metals. The results indicated that the concentrations of heavy metal in sediments of Lake Mochou followed the order of Mn > Zn > Pb > Cu > Cr > Ni > Cd. Cd was the most serious pollution element in the surface sediments of Lake Mochou, which was in serious polluted degree. Heavy metals such as, Pb and Zn were in slight polluted degrees. Other metals, Cr, Cu, Mn and Ni did not cause the pollution in sediments of Lake Mochou. Higher fluctuation was observed in the vertical distribution of Mn and Zn concentrations in the sediments of Lake Mochou. Cd, Pb and Zn were the dominant hazardous metals in the deeper strata sediments of Lake Mochou.