title: Transfer kinetics of perfluorooctane sulfonate from water and sediment to a marine benthic fish, the marbled flounder (Pseudopleuronectes yokohamae).
abstract: The authors 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 3 treatments to PFOS in combinations of these exposure media for 28 d and then depurated for 84 d. 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, that is, 1) sum of dissolved and particulate phases and sediment; 2) dissolved phase, particulate phase, and sediment; and 3) 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 the whole body to be 29 d to 31 d. The better fit of models 1 and 2 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, the authors propose that further investigation is necessary regarding the mechanisms responsible for the uptake.
authors: National Institute for Environmental Studies, Tsukuba, Japan. tsakurai@nies.go.jp
authors: Takeo
authors: T
authors: Sakurai
authors: Jun
authors: J
authors: Kobayashi
authors: Kyoko
authors: K
authors: Kinoshita
authors: Nozomi
authors: N
authors: Ito
authors: Shigeko
authors: S
authors: Serizawa
authors: Hiroaki
authors: H
authors: Shiraishi
authors: Jeong-Hoon
authors: JH
authors: Lee
authors: Toshihiro
authors: T
authors: Horiguchi
authors: Hideaki
authors: H
authors: Maki
authors: Kaoruko
authors: K
authors: Mizukawa
authors: Yoshitaka
authors: Y
authors: Imaizumi
authors: Toru
authors: T
authors: Kawai
authors: Noriyuki
authors: N
authors: Suzuki
mesh_terms: D017738:Alkanesulfonic Acids / Q000737:chemistry / Q000378:metabolism*; D000818:Animals; D005260:Female; D005432:Flounder / Q000378:metabolism*; D005466:Fluorocarbons / Q000737:chemistry / Q000378:metabolism*; D019015:Geologic Sediments / Q000737:chemistry*; D006207:Half-Life; D007700:Kinetics; D008297:Male; D012623:Seawater / Q000737:chemistry*; D014018:Tissue Distribution; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*
chemical_list: D017738:Alkanesulfonic Acids; D005466:Fluorocarbons; D014874:Water Pollutants, Chemical; C076994:perfluorooctane sulfonic acid
keywords: Aquatic organism; Bioconcentration; Particle; Persistent organic pollutants; Respiratory uptake
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