Distribution of the Heavy Metals in Sea Water, Surface Sediments and Aquatic Organisms from Dagang Bay, Fujian Province

Based on the data of environmental survey obtained from the Dagang Bay, Fujian Province in July 1997, the concentrations and distributions of heavy metals in sea water, surface sediments and aquatic organisms are analyzed. The results may be summarized as follows: The contents of Cu, Pb, Cd, Zn in sea water at the Dagang Bay are all below the Fisheries Water Quality Standard. The contents of Cu, Pb, Cd, Zn in sea water and surface sediments from the head water of Dagang Bay are much higher than those in the estuary water of the bay. Those in the south waters are much higher than those in the north waters. In addition, according to the values of Standard for Marine Sediments Quality and Public-Disaster-Free Foods and Marine Biological Quality and Tolerance Limit of Zinc in Foods of China, the pollution level of the six species of aquatic organisms and surface sediments by heavy metals have been assessed. The results show that the concentrations of heavy metals in the aquatic organisms at the Dagang Bay are all below the standards, except the contents of Cd in the sediments.