摘要
为研究多芳环烃(PAHs)在虾夷马粪海胆Strongylocentrotus intermedius体内的富集动力学,系统认识其动力学参数特征,应用半静态双箱动力学模型拟合虾夷马粪海胆(壳直径2.0 cm±0.3 cm)对3,4-苯并[a]芘、9,10-二甲基蒽、3-甲基菲3种PAHs的生物富集过程,通过非线性拟合获得海胆对3种多环芳烃的吸收速率常数(K_(1))、释放速率常数(K_(2))、生物富集因子(BCF),以及平衡状态下海胆体内3种多环芳烃的含量(C_(max))、生物学半衰期(t_(1/2))等动力学参数。结果表明:海胆对3,4-苯并[a]芘富集动力学参数K_(1)、K_(2)、BCF、C_(max)、t_(1/2)的平均值分别为59.1、0.152、136.5、11.788μg/g和6.36 d;海胆对9,10-二甲基蒽富集动力学参数K_(1),K_(2)、BCF、C_(max)、t_(1/2)的平均值分别为12.3、0.228、54.05、4.383μg/g和6.32 d;海胆对3-甲基菲富集动力学参数K_(1)、K_(2)、BCF、C_(max)、t_(1/2)的平均值分别为18.16、0.113、88.1、12.407μg/g和7.6 d;在5μg/L浓度条件下,海胆对3种多环芳烃的富集能力进行比较,依次为3,4-苯并[a]芘(14 d BCF=220)>3-甲基菲(14 d BCF=128.4)>9,10-二甲基蒽(14 d BCF=84.0)。研究表明,海胆对浓度为1、5、20μg/L的3,4-苯并[a]芘、浓度为5、100μg/L的3-甲基菲、浓度为5、10、50μg/L的9,10-二甲基蒽的生物富集过程均符合双箱动力学模型。
Simulation research on bioaccumulation of 3,4-benzo[a]pyrene,9,10-dimethyl anthracene,and3-methyl phenanthrene was conducted in sea urchin Strongylocentrotus intermedius with shell diameter of(2.0±0.3)cm by a semi-static two-compartment kinetic model to study bioconcentration kinetics of PAHs in sea urchin and to understand the dynamic parameters including absorption rate constant(K_(1)),release rate constant(K_(2)),biological enrichment factor(BCF),content(C max)and biological half-life(t1/2)of the three PAHs in the sea urchin in the equilibrium state by nonlinear fitting.The kinetic parameter average values in the sea urchin were shown to be59.1in K_(1),0.152 in K_(2),136.5in BCF,11.788μg/g in C max,and 6.36d in t1/2for3,4-benzo[a]pyrene;12.3in K_(1),0.228in K_(2),54.05 in BCF,4.383μg/g in C max,and6.32d in t1/2 for 9,10-dimethyl anthracene;and 18.16 in K_(1),0.113 in K_(2),88.1in BCF,12.407μg/g in C max,and 7.6d in t1/2for3-methyl phenanthrene.The descending order of BCF of the three PAHs absorbed by sea urchin was expressed as 3,4-benzo[a]pyrene(14d BCF=220)>3-methyl phenanthrene(14d BCF=128.4)>9,10-dimethyl anthracene(14d BCF=84.0)in the sea urchin exposed to the concentration of 5μg/L for the three PAHs,indicating that the absorption processes of PAHs in sea urchin conform to two-compartment kinetic model for3,4-benzo[a]pyrene,9,10-dimethyl anthracene and3-methyl phenanthrene.
作者
魏海峰
田山川
刘长发
WEI Hai-feng;TIAN Shan-chuan;LIU Chang-fa(College of Ocean Technology and Environment,Key Laboratory of Nearshore Marine Environmental Research of Liaoning Province,Dalian Ocean University,Dalian 116023,China)
出处
《大连海洋大学学报》
CAS
CSCD
北大核心
2018年第6期743-748,共6页
Journal of Dalian Ocean University
基金
国家海洋公益性行业科研专项(201305002)
国家海洋局海洋溢油鉴别与损害评估技术重点实验室开放课题(201309,201809)
国家海洋局近岸海域生态环境重点实验室课题(201013)
辽宁省教育厅服务地方项目.
