A primary study on the distribution and pollution of heavy metals in the surficial sediments of Zhelin Bay

In present study,The contents of 7 kinds of heavy metals(Fe,Mn,Cu,Pb,Zn,Co,Ni) in surficialsediments of Zhelin Bay were determined,and their distribution and main resources were analyzed.The results showed that the mean contents of the heavy metals were: Zn 11.3 μg/g ± 6.5 μg/g;Cr 40.1 μg/g± 8.5 μg/g;Mn 837.9 μg/g± 168.6 μg/g;Cu 24.0 μg/g ± 4.3 μg/g;Pb 57.7 μg/g ± 11.3 μg/g;Ni 24.4 μg/g ± 5.7 μg/g;Fe 3.7% ± 0.4 %.The main resources of heavy metals are from terrestrial weathering products and their contents reflected the ubiquitous geochemical characteristic of eastern Guangdong province.The pollution degree of heavy metals in surface sediment of Zhelin Bay was assessed,according to the criterion of marine sediment quality and the criterion of Hong Kong Environmental Protection Department,the result showed that the contents of Pb in a few stations made middle pollution,the other heavy metals made only slightly pollution in whole studied area.