海参(Apostichopus japonicus)对三种多环芳烃的富集动力学研究

应用半静态双箱动力学模型模拟了海参对苯并a]芘、2-甲基蒽、3-甲基菲三种PAHs的生物富集实验，通过对这三种多环芳烃在海参体内含量进行非线性拟合，得到富集动力学参数。结果表明，海参对三种多环芳烃的富集能力和速率随着海水中的这三种多环芳烃的浓度增加而增加。海参在苯并a]芘5 μg/L、2-甲基蒽10 μg/L和3-甲基菲100 μg/L浓度条件下的吸收过程符合双箱动力学模型。在5 μg/L条件下，海参对三种多环芳烃的平均富集系数，2-甲基蒽148.3>苯并a]芘126.9>3-甲基菲88.0。

Study on the bioaccumulation kinetics of three PAHs by Apostichopus japonicus

With the increase of sewerage discharge, PAHs pollution has become more serious.3, 4-benzo (a) pyrene, 9, 10-dimethylanthracene, 3-methylphenanthrene are carcinogenic PAHs in ocean.Sea cucumber (Apostichopus japonicus) is a widely cultured economic species in the coast of China.Therefore, it is particularly important to study the bioaccumulation of PAHs by sea cucumber.The semi-static two-compartment kinetic model was used to simulate the bioaccumulation experiment of 3, 4-benzo (a) pyrene, 9, 10-dimethylanthracene, 3-methylphenanthrene by Apostichopus japonicus.The bioaccumulation kinetics parameters of 3, 4-benzo (a) pyrene, 9, 10-dimethylanthracene, 3-methylphenanthrene were achieved by nonlinear curve fitting.The results showed that sea cucumber has ability to accumulate 9, 10-dimethylanthracene, 3, 4-benzo (a) pyrene and 3-methylphenanthrene.The enrichment ability and rate of sea cucumber to the three polycyclic aromatic hydrocarbons increase with the increase of the concentration of the three polycyclic aromatic hydrocarbons in the seawater.The absorption processes of PAHs conform to two-compartment kinetic model under the conditions of 3, 4-benzo (a) pyrene 5 μg/L, 9, 10-dimethylanthracene 10 μg/L and 3-methylphenanthrene 100 μg/L concentrations.The BCF of the three PAHs absorbed by sea cucumber are in the order of 9, 10-dimethylanthracene 148.3>3, 4-benzo (a) pyrene 126.9 >3-methylphenanthrene 88.0 at the concentration of 5 μg/L.