John Wiley & Sons, Ltd.

Bioaccumulation of perfluoroalkyl acids including the isomers of perfluorooctane sulfonate in carp (Cyprinus carpio) in a sediment/water microcosm

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Carp (Cyprinu carpio) were exposed to perfluoroalkyl acids (PFAAs) including perfluorooctane sulfonate (PFOS) isomers in an artificially contaminated sediment/water microcosm. The uptake constant of PFAAs increased with increasing carbon chain length, while the elimination coefficient displayed the opposite trend, suggesting carbon chain length played an important role in the bioaccumulation of PFAAs. If contribution of suspended particulate matter (SPM) was taken into account, the bioaccumulation factors (BAFs) became lower (3.61‐600 L/kg) compared to those only considering the absorption from free PFAAs in water (3.85‐97000 L/kg). The results indicated that SPM in water constituted an important source of exposure for aquatic organisms to long chain PFAAs. Linear (n‐) PFOS was preferentially accumulated compared to branched isomers in carp. Among the branched isomers, 1m‐PFOS displayed the greatest while m2‐PFOS showed the lowest bioaccumulation ability. Linear PFOS displayed greater partitioning ability from blood to other tissues over branched PFOS (br‐PFOS) isomers, leading to relatively lower n‐PFOS proportion in blood. Capsule: SPM made contribution to the accumulation of long chain PFAAs in aquatic organisms, and n‐PFOS was preferentially accumulated compared to br‐PFOS isomers. This article is protected by copyright. All rights reserved

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