John Wiley & Sons, Ltd.

Transfer kinetics of perfluorooctane sulfonate (PFOS) from water and sediment to a marine benthic fish, the marbled flounder (Pseudopleuronectes yokohamae)

0
We investigated the kinetics of transfer of perfluorooctane sulfonate (PFOS) from water, suspended sediment, and bottom sediment, to a marine benthic fish, the marbled flounder (Pseudopleuronectes yokohamae). Fish were exposed in three treatments to PFOS in combinations of these exposure media for 28 days, and then depurated for 84 days. A major part (37%–66%) of PFOS in the fish was in the carcass (i.e., whole body minus muscle and internal organs). Three first‐order‐kinetic models that differed in exposure media, i.e., (I) sum of dissolved and particulate phases, and sediment; (II) dissolved phase, particulate phase, and sediment, and (III) dissolved phase only, were fitted to the data assuming common rate constants among the treatments. The uptake efficiency of dissolved PFOS at the respiratory surfaces was estimated to be 3.2% that of oxygen, and the half‐life of PFOS in fish whole body 29 to 31 d. The better fit of models (I) and (II) and the values of the estimated uptake rate constants suggested that the PFOS in suspended and bottom sediments, in addition to that dissolved in water, contributed to the observed body burden of the fish. Based on an evaluation of several possible contributing factors to the uptake of PFOS from suspended and bottom sediments, we propose that further investigation is necessary regarding the mechanisms responsible for the uptake. Environ Toxicol Chem © 2013 SETAC

Customer comments

No comments were found for Transfer kinetics of perfluorooctane sulfonate (PFOS) from water and sediment to a marine benthic fish, the marbled flounder (Pseudopleuronectes yokohamae). Be the first to comment!