Bioaccumulation of perfluoroalkyl compounds in midge (Chironomus riparius) larvae exposed to sediment

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• 作者：Delphine Bertin^a ; ^{delphine.bertin@irstea.fr" class="auth_mail} ; Benoî ; t J.D. Ferrari^a ; ¹ ; ^{benoit.ferrari@irstea.fr" class="auth_mail} ; ^{benoit.ferrari@centreecotox.ch" class="auth_mail} ; Pierre Labadie^b ; ^{pierre.labadie@u-bordeaux1.fr" class="auth_mail} ; Alexandre Sapin^a ; ^{alexandre.sapin@irstea.fr" class="auth_mail} ; Jeanne Garric^a ; ^{jeanne.garric@irstea.fr" class="auth_mail} ; Hé ; lè ; ne Budzinski^b ; ^{h.budzinski@epoc.u-bordeaux1.fr" class="auth_mail} ; Magali Houde^c ; ^{Magali.Houde@ec.gc.ca" class="auth_mail} ; Marc Babut^a ; ^{marc.babut@irstea.fr" class="auth_mail}
• 关键词：Perfluoroalkyl compounds ; Sediment ; Chironomus riparius ; Bioaccumulation
• 刊名：Environmental Pollution
• 出版年：June, 2014
• 年：2014
• 卷：189
• 期：Complete
• 页码：27-34
• 全文大小：1119 K

文摘

Midge larvae (Chironomus riparius) were exposed to sediments from a deposition sampled at a site along the Rh么ne 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.