title: Bioaccumulation of perfluoroalkyl compounds in midge (Chironomus riparius) larvae exposed to sediment.
abstract: Midge larvae (Chironomus riparius) were exposed to sediments from a deposition sampled at a site along the Rhône River (France) downstream of an industrial site releasing various perfluorinated chemicals. This sediment is characterized by high concentrations of perfluoroundecanoic acid (PFUnA) and perfluorotridecanoic acid (PFTrDA) and a low perfluorooctane sulfonate (PFOS) concentration. Concentrations of 23 perfluoroalkyl compounds, including C4-C14 carboxylate acids, C4-C10 sulfonates, and seven precursors, were analyzed in overlying and pore water, sediment, and larvae. Midge larvae accumulated carboxylate acids (C11-C14), PFOS, and two precursors (perfluorooctane sulfonamide: FOSA and 6:2 fluorotelomer sulfonic acid, 6:2 FTSA). These substances accumulated mainly during the fourth instar larvae exponential growth phase. Accumulation of 6:2 FTSA, PFUnA, and PFOS occured via trophic and tegumentary routes. Other compounds mainly accumulated from food. Kinetics followed a partition model, from which uptake and elimination constants were derived.
authors.affiliation: IRSTEA, UR MALY, 5 rue de la Doua, CS 70077, F-69626 Villeurbanne, France. Electronic address: delphine.bertin@irstea.fr.
authors.forename: Delphine
authors.initials: D
authors.lastname: Bertin
authors.affiliation: IRSTEA, UR MALY, 5 rue de la Doua, CS 70077, F-69626 Villeurbanne, France. Electronic address: benoit.ferrari@irstea.fr.
authors.forename: Benoît J D
authors.initials: BJ
authors.lastname: Ferrari
authors.affiliation: Université Bordeaux 1, Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), UMR 5805 CNRS, Laboratoire de Physico et Toxico-Chimie de l'environnement (LPTC), 351 cours de la Libération, 33405 Talence, France. Electronic address: pierre.labadie@u-bordeaux1.fr.
authors.forename: Pierre
authors.initials: P
authors.lastname: Labadie
authors.affiliation: IRSTEA, UR MALY, 5 rue de la Doua, CS 70077, F-69626 Villeurbanne, France. Electronic address: alexandre.sapin@irstea.fr.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Sapin
authors.affiliation: IRSTEA, UR MALY, 5 rue de la Doua, CS 70077, F-69626 Villeurbanne, France. Electronic address: jeanne.garric@irstea.fr.
authors.forename: Jeanne
authors.initials: J
authors.lastname: Garric
authors.affiliation: Université Bordeaux 1, Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), UMR 5805 CNRS, Laboratoire de Physico et Toxico-Chimie de l'environnement (LPTC), 351 cours de la Libération, 33405 Talence, France. Electronic address: h.budzinski@epoc.u-bordeaux1.fr.
authors.forename: Hélène
authors.initials: H
authors.lastname: Budzinski
authors.affiliation: Environment Canada, Aquatic Contaminant Research Division, 105 rue McGill, Montreal, QC H2Y 2E7, Canada. Electronic address: Magali.Houde@ec.gc.ca.
authors.forename: Magali
authors.initials: M
authors.lastname: Houde
authors.affiliation: IRSTEA, UR MALY, 5 rue de la Doua, CS 70077, F-69626 Villeurbanne, France. Electronic address: marc.babut@irstea.fr.
authors.forename: Marc
authors.initials: M
authors.lastname: Babut
mesh_terms: D000818:Animals; D002683:Chironomidae / Q000378:metabolism*; D004784:Environmental Monitoring; D005466:Fluorocarbons / Q000378:metabolism*; D005602:France; D019015:Geologic Sediments / Q000737:chemistry*; D007814:Larva / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D005466:Fluorocarbons; D014874:Water Pollutants, Chemical
keywords: Bioaccumulation; Chironomus riparius; Perfluoroalkyl compounds; Sediment