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Organotin accumulation in an estuarine food chain: comparing field measurements with model estimations
Veltman, K.; Huijbregts, M.A.J.; van den Heuvel-Greve, M.J.; Vethaak, A.D.; Hendriks, A.J. (2006). Organotin accumulation in an estuarine food chain: comparing field measurements with model estimations. Mar. Environ. Res. 61(5): 511-530. dx.doi.org/10.1016/j.marenvres.2006.02.005
In: Marine Environmental Research. Applied Science Publishers: Barking. ISSN 0141-1136, more
Peer reviewed article  

Available in Authors 

Keywords
    Bioaccumulation; Estuaries; Food chains; Uptake; Brackish water; Fresh water
Author keywords
    Organotins; Model-bioaccumulation; Elimination kinetics; Uptake; Food chain; Estuaries

Authors  Top 
  • Veltman, K.
  • Huijbregts, M.A.J., more
  • van den Heuvel-Greve, M.J., more
  • Vethaak, A.D., more
  • Hendriks, A.J., more

Abstract
    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.

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