东山湾养殖区表层沉积物的分布特征及环境评价

DISTRIBUTION CHARACTERISTICS AND ENVIRONMENTAL ASSESSMENT OF THE HEAVY METALS, ORGANIC MATTER AND SULPHIDE IN THE SURFACE SEDIMENTS OF AQUACULTURE AREAS IN DONGSHAN BAY

利用1991－1992年东山湾渔业环境监测资料，着重讨论东山湾水产养殖区表层沉积物中重金属、有机质和硫化物的分布特征，以及它们之间的相关关系，文中还对表层沉积物中重金属。

In this paper, the characterishcs of the heavy metas, orgedc matter andsulphide in surface sediments of aquaculture areas in Dongshan Bay are discussedbased on the observed data in the periods of Oct l99l to Aug- l992- The resultsshow that the mass fractions of Cu, Pb, Zn, Cd, organic matter, sulphide arerespectively l9.O x lO -6, 58.8 x lO-6, l7l.5 x lO-6, l.32 x l0-6, 1.72% and 48O x l0-6.The contents of heavy metas, organic matter and sulphide decreases all from the Bayhead toward the mouth and from the west towards the east. There is an evidentpositive cormlation between the organic matter with the heavy metas and sulphide.According to the values of the Pollution Evaluation Standard for Surface Sedimentsrecommnded by the Technical Group of National Coastal Zone PollutionComprehensive Survey of the People's Republic of China the surface sediments fromaquaculture areas of Dengshan Bay were indeed polluted by Pb, Zn and Cd.