水东港及其近岸海域食用水产品重金属污染及无公害评价

Assessment of Non Public Nuisance and Heavy Metal Pollution on Aquatic Products in Shuidong Harbor and Its Inshore

关键词:  海洋生物  重金属  污染  评价

Key words:  organism  heavy metal  pollution  assessment

摘要:

2005年10月对水东港及其近岸海域海水和海洋生物体进行采样,测定海水中重金属(As、Hg、Pb、Cd和Cu)和海洋生物体内重金属(Cu、Pb、Cd、Hg、Cr、Zn和Ni)含量,其中海水重金属含量采用单项污染指数评价法进行评价,海洋生物体内重金属含量采用生物质量指数法进行评价,海洋生物的无公害评价按照国家农业行业标准进行评价,海洋生物对重金属的富集状况通过生物体对某种重金属的富集系数来评价。结果表明:水东港及其近岸海域海水中As、Hg、Pb、Cd和Cu的含量均低于渔业水质标准和海水水质标准,总体质量为优质;水东港及其近岸海水中海洋生物体内重金属的含量均低于海洋生物污染评价标准,但是各类生物体内的Pb和Cd的含量均超过国家无公害标准;各类海洋生物对于Cd比其它重金属具有较强的富集能力。

Abstract:

The sea water and marine organisms were sampled in Shuidong Harbour and its inshore in Oct 2005 for testing the amounts of heavy metals As、Hg、Pb、Cd, Cu, Hg, Cr, Zn, Ni.The single item pollution index, biomass index and the national trade standard of agriculture are used for the assessment of seawater, marine organisms and non public nuisance, respectively.The enrichment of heavy metals in marine organisms is assessed with concentration coefficient of individual metal in organism.In the sampling area, the amounts of As, Hg, Pb, Cd and Cu are lower than the water quality standard for fishery and sea water quality standard.The seawater quality is ranked as goodness in general.The amounts of heavy metals in organisms are lower than the assessment criterion of marine biodeterioration, but the concentrations of Pb and Cd are higher than the national standard for non public nuisance.All marine organisms enrich Cd more than any other heavy metals.