【摘要】 对湛江红树林海域24种海洋生物体内多环芳烃(PAHs)的含量水平、组成及食用安全性进行了研究。结果表明,鱼类、头足类、甲壳类和贝类生物体PAHs总量范围分别为191~548 ng/g(干重,下同)、348~460 ng/g、337~518 ng/g和380~491 ng/g,平均含量分别为349.2 ng/g、420.9 ng/g、424.3 ng/g、455.9 ng/g。各类生物体中PAHs含量存在一定的差异,平均含量由高到低依次为:贝类、甲壳类、头足类、鱼类。与国内外相比,湛江红树林生物体PAHs含量处于中等偏下水平。组成分析与风险评价结果显示,湛江红树林海域鱼类、头足类、甲壳类和贝类生物体中主要以3环PAHs为主,苯并芘(Ba P)含量处于欧盟规定的限值范围,PAHs致癌风险尚处于可接受致癌风险水平(<10–5)。更多还原

【Abstract】 Polycyclic aromatic hydrocarbons(PAHs) are a large group of anthropogenic pollutants that contain two or more fused aromatic rings in linear, angular, or clustered arrangements. PAHs are introduced into marine environments through events such as atmospheric deposition, accidental oil spills, transport accidents, combustion of fuels, municipal, and urban runoff. PAHs elicit particular concern, and 16 PAHs were listed as priority pollutants by the US EPA because of their health risk as potential carcinogens and mutagens. Because of their lipophilic properties and resistance to degradation, PAHs can accumulate in organic tissue. Consequently, alarming concentrations of these compounds have been found in many marine species. Levels, composition profiles, and health risk assessment of PAHs were studied in 24 species of marine organisms collected from Zhanjiang mangroves. PAH concentrations were determined using gas chromatography coupled with mass spectroscopy. The results demonstrated that the total concentration of PAHs in 11 species of marine fishes, 3 species cephalopods, 6 species crustaceans, and 4 species shellfish ranged from 191–548 ng/g(dry weight), 348–460 ng/g, 337–518 ng/g, and 380–491 ng/g, respectively, and their average levels were 349.2 ng/g, 420.9 ng/g, 424.3 ng/g, and 455.9 ng/g, respectively. The average PAH concentrations differed among species and in the following decreasing order: shellfish>crustaceans>cephalopods>marine fishes. Compared with PAH levels of other coastal areas of the world, the PAH levels from Zhanjiang mangroves were low to moderate. The composition of PAHs was characterized by three rings of PAHs. Potential risk assessments demonstrated that the levels of benzo[a]pyrene in fishes, cephalopods, crustaceans, and shellfish from Zhanjiang mangroves were within the EU limits and were considered acceptable(<10-5).更多还原