The distribution characteristics of heavy metals such as Cu,Zn,Pb,Cd,Hg,As in seawater,superficial sediments and several marine organisms of Dongzhai Harbor,Hainan were analyzed.Index methods of the single factor and the geo-accumulation were used to assess heavy metal pollution degree.The results showed that the heavy metal levels in seawater of Dongzhai Harbor accorded with the first category of the seawater except Pb,and were much lower than the restrictive value of the fishery water quality standard.The concentration of the heavy metals in surface sediments did not exceed the national benchmark of the first-class of marine sediment quality,and the superficial sediments were essentially uncontaminated.The heavy metal content in wetland sediments was slightly higher than those in other typical mangrove wetlands of the Island of Hainan.The heavy metal contents in mangrove and hidden shoal sediments was higher than that in marine sediments in Dongzhai Haibor,which indicates that this area may have been affected by land-based pollution,and this needs the attention of related departments; the heavy metal concentrations in marine organisms were up to the first category.No organism was beyond the standard of non-environmental pollution aquatic products.%分析了东寨港海水、表层沉积物和生物体中重金属Cu、Zn、Pb、Cd、Hg、类金属As的含量及分布特征,并运用单因子指数法、地积累指数法评价了该调查区重金属污染程度.结果表明:东寨港海水中除Pb的含量符合二类海水标准外,其余含量均符合一类海水标准,且远低于渔业水质标准限值;表层沉积物中典型重金属元素含量都符合海洋沉积物质量一类标准,基本属于无污染区;本区湿地沉积物中的重金属含量比岛内及周边区典型红树林湿地略偏高;红树林及暗滩沉积物中重金属比东寨港水底沉积物重金属含量高,表明河口湾潮滩上的红树林区可能是重金属元素的富集区,东寨港目前可能受到了陆源污染的影响;生物体中重金属含量均符合一类标准,符合无公害水产品的要求.
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