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首页> 外文期刊>Environmental Science & Technology >Development of a multichemical food web model: Application to PBDEs in Lake Ellasjoen, Bear Island, Norway
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Development of a multichemical food web model: Application to PBDEs in Lake Ellasjoen, Bear Island, Norway

机译：建立多化学食物网络模型：应用于挪威熊岛埃拉斯霍恩湖的多溴二苯醚

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A multichemical food web model has been developed to estimate the biomagnification of interconverting chemicals in aquatic food webs. We extended a fugacity-based food web model for single chemicals to account for reversible and irreversible biotransformation among a parent chemical and transformation products, by simultaneously solving mass balance equations of the chemicals using a matrix solution. The model can be applied to any number of chemicals and organisms or taxonomic groups in a food web. The model was illustratively applied to four PBDE congeners, BDE-47, -99, -100, and -153, in the food web of Lake Ellasjoen, Bear Island, Norway. In Ellasjoen arctic char (Salvelinus alpinus), the multichemical model estimated PBDE biotransformation from higher to lower brominated congeners and improved the correspondence between estimated and measured concentrations in comparison to estimates from the single-chemical food web model. The underestimation of BDE-47, even after considering bioformation due to biotransformation of the other three congeners, suggests its formation from additional biotransformation pathways not considered in this application. The model estimates approximate values for congener-specific biotransformation half-lives of 5.7, 0.8, 1.14, and 0.45 years for BDE-47, -99, -100, and -153, respectively, in large arctic char (S. alpinus) of Lake Ellasjoen.
机译：已开发出一种多化学食物网模型来估算水生食物网中相互转化的化学物质的生物放大倍数。我们通过使用矩阵解决方案同时求解化学物质的质量平衡方程，扩展了针对单一化学物质的基于逸度的食物网络模型，以解释母体化学物质和转化产物之间可逆和不可逆的生物转化。该模型可以应用于食物网中的任何数量的化学物质，生物或分类组。该模型被说明性地应用于挪威熊岛埃拉斯霍恩湖食物网中的四个多溴二苯醚同系物，BDE-47，-99，-100和-153。与单化学食物网模型的估计值相比，在多生化模式下的Ellasjoen北极炭（Salvelinus alpinus）估计了多溴二苯醚从较高溴代到较低溴代同系物的生物转化，并改善了估计浓度和实测浓度之间的对应关系。即使考虑到由于其他三个同源物的生物转化而导致的生物形成后，对BDE-47的低估也表明它是由本申请中未考虑的其他生物转化途径形成的。该模型估算了在北极大型黑点（S. alpinus）中，BDE-47，-99，-100和-153的同源物特异性生物转化半衰期的近似值分别为5.7、0.8、1.14和0.45年。埃拉斯霍恩湖。

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