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首页> 外文期刊>Environmental Science & Technology >Black Carbon Inclusive Multichemical Modeling of PBDE and PCB Biomagnification and-Transformation in Estuarine Food Webs
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Black Carbon Inclusive Multichemical Modeling of PBDE and PCB Biomagnification and-Transformation in Estuarine Food Webs

机译：河口食物网中PBDE和PCB生物放大和转化的含黑碳多化学建模

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Bioavailability and bioaccumulation of polybrominated diphenylethers (PBDEs) are affected by adsorption on black carbon (BC) and metabolism in biota, respectively. Recent studies have addressed these two processes separately, illustrating their importance in assessing contaminant dynamics. In order to properly examine biomagnification of polychlorinated biphenyls (PCBs) and PBDEs in an estuarine food-web, here we set up a black carbon inclusive multichemical model. A dual domain sorption model, which accounted for sorption to organic matter (OM) and black carbon (BC), was used to estimate aqueous phase concentrations from the measured chemical concentrations in suspended solids. We adapted a previously published multichemical model that tracks the movement of a parent compound and its metabolites in each organism and within its food web. First, the model was calibrated for seven PCB congeners assuming negligible metabolism. Subsequently, PBDE biomagnification was modeled, including biotransformation and bioformation of PBDE congeners, keeping the other model parameters the same. The integrated model was capable of predicting trophic magnification factors (TMF) within error limits. PBDE metabolic half-lives ranged 21-415 days and agreed to literature rndata. The results showed importance of including BC as an adsorbing phase, and biotransformation and bioformation of PBDEs for a proper assessment of their dynamics in aquatic systems.
机译：多溴二苯醚（PBDEs）的生物利用度和生物蓄积分别受黑碳（BC）的吸附和生物区中新陈代谢的影响。最近的研究分别解决了这两个过程，从而说明了它们在评估污染物动力学方面的重要性。为了正确检查河口食物网中多氯联苯和多溴二苯醚的生物放大率，在这里我们建立了一个包含黑碳的多化学模型。考虑到对有机物（OM）和黑碳（BC）的吸附的双域吸附模型用于根据所测得的悬浮固体中的化学浓度估算水相浓度。我们改编了先前发布的多化学模型，该模型可跟踪母体化合物及其代谢产物在每种生物体及其食物网中的运动。首先，假设新陈代谢可忽略不计，针对七个PCB同类物对模型进行了校准。随后，对PBDE的生物放大进行建模，包括PBDE同系物的生物转化和生物形成，而其他模型参数保持不变。集成模型能够预测误差范围内的营养放大倍数（TMF）。 PBDE的代谢半衰期为21-415天，并同意文献中的数据。结果表明，将BC作为吸附相以及将PBDEs进行生物转化和生物形成对于正确评估其在水生系统中的动力学具有重要意义。

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  • 来源
    《Environmental Science & Technology》 |2010年第19期|p.7548-7554|共7页
  • 作者

    CAROLINA DI PAOLO; NILIMA GANDHI; SATYENDRA P. BHAVSAR; MARTINE VAN DEN HEUVEL-GREVE; ALBERT A. KOELMANS;

  • 作者单位

    Aquatic Ecology and Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 47, 6700AA, Wageningen, The Netherlands;

    rnDivision of Environmental Engineering, Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada, M5S 3E5;

    rnCentre for Environment, University of Toronto, Toronto. ON, Canada, M5S 3E8 Environmental Monitoring and Reporting Branch, Ontario Ministry of the Environment, 125 Resources Road. Etobicoke, ON, Canada, M9P 3 V6;

    rnDeltares, Department of Marine and Coastal Systems, P.O. Box 177, 2600 MH Delft, The Netherlands IMARES-Institute for Marine Resources & Ecosystem Studies, Wageningen UR, P.O. Box 68, 1970 AB Ijmuiden, The Netherlands;

    rnAquatic Ecology and Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 47, 6700AA, Wageningen, The Netherlands IMARES-Institute for Marine Resources & Ecosystem Studies, Wageningen UR, P.O. Box 68, 1970 AB Ijmuiden, The Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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