title: Partitioning and bioaccumulation of PBDEs and PCBs in Lake Michigan.
abstract: Water from Lake Michigan and fish from all five Great Lakes have been sampled and analyzed for a suite of six polybrominated diphenyl ether (PBDE) congeners and 110 polychlorinated biphenyl congeners (PCBs). The Lake Michigan dissolved phase PBDE congener concentrations (0.2 to 10 pg/L) are similar to dissolved phase PCB congener concentrations (nondetected to 13 pg/L). Partitioning of PBDEs between the particulate and dissolved phases exhibits behavior similar to that of PCBs. Organic-carbon-normalized water-particle partition coefficients (log K(OC)s) ranged from 6.2 to 6.5. Lake trout are depleted in BDE-99 relative to dissolved phase concentrations, and in contrast to what is expected from the PCB congener patterns. This reflects suspected debromination of BDE-99 in the food web of Lake Michigan. A regression of the log of the bioaccumulation factor (BAF) and the log of the octanol-water partition coefficent (K(OW)) indicated a positive relationship for both PCB congeners and PBDE congeners. BDE-99 does not appear to followthe same trend, a further indication that it is subject to biotransformation. Using the PBDE BAFs for Lake Michigan and the PBDE fish concentrations from the other Great Lakes it is expected that the dissolved phase concentrations of congeners in the other lakes would range from 0.04 to approximately 3 pg/L.
authors.affiliation: Division of Environmental Health Sciences, School of Public Health, University of Minnesota, MMC 807, 420 Delaware Street SE, Minneapolis, Minnesota 55455, USA.
authors.forename: Summer S
authors.initials: SS
authors.lastname: Streets
authors.forename: Scott A
authors.initials: SA
authors.lastname: Henderson
authors.forename: Amber D
authors.initials: AD
authors.lastname: Stoner
authors.forename: Daniel L
authors.initials: DL
authors.lastname: Carlson
authors.forename: Matt F
authors.initials: MF
authors.lastname: Simcik
authors.forename: Deborah L
authors.initials: DL
authors.lastname: Swackhamer
mesh_terms: D000818:Animals; D002244:Carbon / Q000032:analysis; D004784:Environmental Monitoring / Q000706:statistics & numerical data*; D005618:Fresh Water / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006114:Great Lakes Region; D006842:Hydrocarbons, Brominated / Q000032:analysis* / Q000493:pharmacokinetics; D008055:Lipids / Q000032:analysis; D010647:Phenyl Ethers / Q000032:analysis* / Q000493:pharmacokinetics; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000493:pharmacokinetics; D014337:Trout / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000493:pharmacokinetics
chemical_list: D006842:Hydrocarbons, Brominated; D008055:Lipids; D010647:Phenyl Ethers; D014874:Water Pollutants, Chemical; D002244:Carbon; D011078:Polychlorinated Biphenyls