John Wiley & Sons, Ltd.

Fullerene associated phenanthrene contributes to bioaccumulation but not toxic to fish

The current studies investigated the effects of aqueous fullerene suspensions (nC60) on the bioavailability and toxicity of phenanthrene (Phe) to junior carp (Cyprinus carpio). The bioaccumulation factors (BAFs) were calculated based on total as well as free concentration of Phe. The equal BAF values were obtained with and without nC60 based on the total concentrations, whereas greater BAFs were found in the presence of nC60 when free Phe concentrations were applied. Our results demonstrated that nC60 could act as a contaminate carrier to facilitate Phe bioaccumulation. The concentration‐response relationship of induced hepatic 7‐ethoxysorufin‐o‐deethylase (EROD) activity was established in regard to the total, free concentrations of aqueous Phe solutions as well as the body residues, respectively. The concentration‐response curves were reliant on the nC60 concentration when the total concentration of Phe was employed as variable, whereas were independent of nC60 presence when free concentration or body residues were employed as variables, implying that the latter two parameters were more accurate in evaluating biological effects. C60 particles were mostly distributed in fish liver and intestines, which indicated the primary routine of uptake was through devouring. It was interesting to find that approximately 22–100% of Phe‐nC60 complex contributed to the bioaccumulation, whereas the complex did not contribute to the toxicity. This article is protected by copyright. All rights reserved

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