Organotin accumulation in an estuarine food chain: Comparing field measurements with model estimations

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• 作者：Karin Veltman ; Mark A.J. Huijbregts ; Martine J. van den Heuvel-Greve ; A. Dick Vethaak and A. Jan Hendriks
• 关键词：Organotins ; Model-bioaccumulation ; Elimination kinetics ; Uptake ; Food chain ; Estuaries
• 刊名：Marine Environmental Research
• 出版年：2006
• 出版时间：June 2006
• 年：2006
• 卷：61
• 期：5
• 页码：511-530
• 全文大小：229 K

文摘

The bioaccumulation model OMEGA (optimal modelling for ecotoxicological applications) is used to explore accumulation of organotins in the Western Scheldt food chain, consisting of herbi-detritivores, primary and secondary carnivorous fish and a piscivorous bird. Organotins studied are tributyltin (TBT) and triphenyltin (TPT) and the respective di- and mono-organotin metabolites. Empirical elimination rate constants are compared to model predictions for organic substances and metals. It is found that field bioaccumulation ratios are higher than predicted based on elimination kinetics relevant for organic compounds. The results indicate that uptake of organotins mainly occurs via hydrophobic mechanisms, whereas elimination may occur via metal-like kinetics. This results in very low elimination rates, which are comparable to model predictions for metals.