title: Hexachlorobenzene uptake by fathead minnows and macroinvertebrates in recirculating sediment/water systems.
abstract: Fathead minnows (Pimephales promelas), the worm, Lumbriculus variegatus, and the amphipods Hyalella azteca and Gammarus lacustris were exposed to hexachlorobenzene (HCB) in water with and without a bed of HCB-spiked sediment. Water HCB concentrations were maintained by recirculation through HCB-packed columns. Recirculating HCB-bound particulates and possibly eroded HCB particulates were an added source of HCB in addition to the sediment bed. Significant bioaccumulation of HCB in animal tissues was observed in water-only and water-sediment exposures. The presence of the HCB-spiked sediment did not result in a significant increase in the uptake of HCB by the organisms, but there was a substantial increase in sediment HCB levels over time. Higher tissue HCB levels in aquaria without sediment suggest that the sediment was a more efficient sink for HCB than the organisms.
authors.affiliation: U.S. Environmental Protection Agency, Corvallis Environmental Research Laboratory, Oregon 97333.
authors.forename: G S
authors.initials: GS
authors.lastname: Schuytema
authors.forename: D F
authors.initials: DF
authors.lastname: Krawczyk
authors.forename: W L
authors.initials: WL
authors.lastname: Griffis
authors.forename: A V
authors.initials: AV
authors.lastname: Nebeker
authors.forename: M L
authors.initials: ML
authors.lastname: Robideaux
mesh_terms: D000818:Animals; D002722:Chlorobenzenes / Q000378:metabolism*; D003530:Cyprinidae / Q000378:metabolism*; D005618:Fresh Water / Q000032:analysis; D006581:Hexachlorobenzene / Q000378:metabolism* / Q000633:toxicity; D007448:Invertebrates / Q000378:metabolism*; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity
chemical_list: D002722:Chlorobenzenes; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D006581:Hexachlorobenzene