Abstract:

In this study, heavy metal pollution condition of Poyang Lake was investigated. During rainy and arid seasons, river water and suspended matters samples from the Poyang Lake area were collected and analyzed. In the studying rivers, the concentration of As, Pb, Cu, Zn and other elements were relatively high, whereas Cd was low. The levels of heavy metal showed significant difference between rainy and arid seasons. For the individual elements, Pb, Zn, Cu and Ni were transported mostly in the form of the suspended matters, while As was moved in the dissolved form mostly. Nevertheless, Cd was in both dissolved and suspended forms in all the samples. It is found that the distribution of heavy metal in solidliquid was affected by pH, temperature in water and concentration of suspended solids. However, the influence was different among elements. It is also found that the main input of heavy metal pollution in Poyang Lake was originated from Ganjiang and Xinjiang.

Key words: water system of the Poyang Lake, flux, heavy metal, geochemical characteristic