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A dynamic multimedia environmental and bioaccumulation model for brominated flame retardants in Lake Huron and Lake Erie, USA

机译:美国休伦湖和伊利湖的溴化阻燃剂动态多媒体环境和生物累积模型

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摘要

Polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs) may pose a worldwide pollution problem because of their persistence, long-range transport capability, and predisposition to bioaccumulate. The ubiquitous presence of PBBs and PBDEs has heightened interest in determination of their fate. We report results for a fugacity-based dynamic environmental and bioaccumulation model of the fate of hexabromobiphenyl (hexaBB) discharged into the Saginaw Bay region of Lake Huron, USA. We calculated transient fugacity profiles of hexaBB in Lake Huron and Lake Erie water and sediment during the 1970s, 1980s, and 1990s. The hexaBB concentrations in the environmental compartments were used as inputs for a dynamic bioaccumulation model of Lake Huron and Lake Erie aquatic biota. The model results indicate that the sediment compartments of Lakes Huron and Erie serve as reservoirs for the accumulation and slow transfer of hexaBB to the food web constituents of these lakes. We present bioaccumulation factors (BAFs) and compare the predicted hexaBB concentrations in lake trout from the bioaccumulation model with measurements during the period 1980 to 2000. An uncertainty analysis for this model suggests that errors associated with input parameter uncertainty can be reduced by refining estimates of the sediment degradation half-life of hexaBB. The corroborated PBB model has carryover application for modeling the fate of polybrominated diphenyl ether (PBDE) contaminants in the Great Lakes. By fitting model outputs to field measurement data using the transformed least square fit method, we report estimations of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) emission rates into the Lake Huron and Lake Erie watershed areas. Environ. Toxicol. Chem. 2011; 30:1018–1025. © 2011 SETAC
机译:多溴联苯(PBB)和聚溴二苯醚(PBDES)可能由于其持续存在,远程传输能力和生物累积性的倾向而造成全球污染问题。 PBBS和PBDE的普遍存在的存在提高了对其命运的兴趣。我们向美国湖休伦岛湾湾地区排放到六溴苯苯基(Hexabb)命运的基于Fugacity的动态环境和生物积累模型的结果。在20世纪70年代,20世纪70年代和20世纪90年代,我们计算了休克湖和伊利湖水和泥沙湖中Hexabb的瞬态不足曲线。环境隔间中的Hexabb浓度被用作休伦湖和伊利湖水产生物湖动态生物积累模型的输入。模型结果表明,湖泊休伦和伊利的沉积物隔室用作河内的积累和缓慢转移到这些湖泊的食物网组成部分的储层。我们提出了生物累积因子(BAF),并在1980年至2000期间将预测的乳房湖泊中的湖泊中的预测六巴伐克浓度与测量结果进行了测量。该模型的不确定性分析表明,通过精制估计可以减少与输入参数不确定性相关的错误沉积物降解了六六的半衰期。相关的PBB模型具有用于在大湖泊中对多溴苯醚(PBDE)污染物的命运进行建模的携带申请。通过使用转化的最小二乘法的拟合模型输出到现场测量数据,我们将2,2',4,4'-四溴二苯醚(BDE-47)排放率的估计报告为休伦湖和伊利流域区域。环境。毒素。化学。 2011; 30:1018-1025。 ©2011 SetAc.

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