DISTRIBUTION AND ENVIRONMENT ASSESSMENT OF HEAVY METALS IN THE SEDIMENTS OF DINGZI BAY, SHANDONG PROVINCE

Based on the concentrations of heavy metals (Hg, Cu, Pb, Zn, Cd, Cr, As, Ni) of 126 surface sediments collected from Dingzi Bay, Shandong province, the method of ecological hazard index is used in this paper to evaluate the pollution of sediments. The content of heavy metals and the distribution patterns and pollution status of the surface sediments are discussed. Results show that the average contents of Hg, Cd, As, Pb, Cu, Cr and Zn in the surface sediments of Dingzi Bay are 0.02, 0.08, 8.38, 15.31, 11.49, 60.96 and 46.42 μg/g, respectively, indicating that the ecological hazard of the area is limited in a reasonable range. This is the first time to evaluate the environmental quality objectively by heavy metals in Dingzi Bay according to the local needs. As an important contribution it may serve the local economic construction and marine ecological civilization.