Abstract: The distribution and accumulation of Cu,Zn,Cd and Pb in multi-phase media(water phase, surficial sediments, surface coatings and suspended particulates) in the Nanhu Lake were investigated. The results show that the content of Zn is the highest among the four metals in all the phases, but the accumulation capacity of Cd is better than that of Zn although the content of Cd is the least; among all the phases, the accumulation capacities of the heavy metals of the suspended particulates and the surface coatings are much better than those of the surficial sediments, and a-point-source pollution is a common characteristic of these four heavy metals. Then the correlation analyses between the metals were studied by means of SPSS statistical analysis with SPSS for Wi ndows (V6.0), and the results indicate that the trends of correlation between the metals of the surficial sediments, suspended particulates and surface coatings are more or less different from each other, and Cd content correlates better with Fe content and Pb correlates better with Mn content, implying that in the aquatic environment, Fe oxides have more effect on the chemical behavior of Cd and Mn oxides have more effect on the chemical behavior of Pb from the view of statistical analyses.

Key words: heavy metal, Fe and Mn oxides, surficial sediment, surface coating, suspended particulate, SPSS statistical analysis