title: The distribution and relative toxic potential of organic chemicals in a PCB contaminated bay.
abstract: For reliable monitoring of environmental improvement, the PCB contaminated bay Orserumsviken on Sweden's Baltic coast was investigated prior to remediation. We examined PCB congener patterns and the relative toxic potential of PCBs in extracts of three matrices: bottom sediment, settling particulate matter and the dissolved phase (obtained from semi-permeable membrane devices). Congener patterns were similar in all matrices. Three fractions were isolated from the extracts: (1) aliphatic and monocyclic aromatic compounds (MAC-fraction), (2) dicyclic aromatic compounds (DAC-fraction), including PCBs, and (3) polycyclic aromatic compounds (PAC-fraction), including PAHs. Total extracts and fractions were injected into newly fertilised rainbow trout eggs. At larval stage, hepatic EROD activities were quantified. Though high, the PCB contamination could explain only an estimated 1-5% of the total EROD induction. The order of EROD induction potential was: total extract > PAC-fraction > DAC-fraction > MAC-fraction in all matrices, suggesting that in Orserumsviken PACs made a larger contribution to the EROD induction potential than PCBs and other DACs.
authors.affiliation: Institute of Applied Environmental Research (ITM), Stockholm University, SE-106 91 Stockholm, Sweden. henrik.sundberg@itm.su.se
authors.forename: Henrik
authors.initials: H
authors.lastname: Sundberg
authors.forename: Ulla
authors.initials: U
authors.lastname: Tjärnlund
authors.forename: Gun
authors.initials: G
authors.lastname: Kerman
authors.forename: Maria
authors.initials: M
authors.lastname: Blomberg
authors.forename: Rasha
authors.initials: R
authors.lastname: Ishaq
authors.forename: Kerstin
authors.initials: K
authors.lastname: Grunder
authors.forename: Tommy
authors.initials: T
authors.lastname: Hammar
authors.forename: Dag
authors.initials: D
authors.lastname: Broman
authors.forename: Lennart
authors.initials: L
authors.lastname: Balk
mesh_terms: D000818:Animals; D005591:Chemical Fractionation; D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D019363:Cytochrome P-450 CYP1A1 / Q000378:metabolism*; D004784:Environmental Monitoring / Q000706:statistics & numerical data*; D004785:Environmental Pollutants / Q000032:analysis*; D004789:Enzyme Activation / Q000187:drug effects; D005374:Filtration; D019015:Geologic Sediments / Q000032:analysis*; D007814:Larva / Q000187:drug effects / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008567:Membranes, Artificial; D017686:Oncorhynchus mykiss / Q000378:metabolism*; D009930:Organic Chemicals / Q000032:analysis* / Q000633:toxicity; D012623:Seawater / Q000032:analysis*; D013548:Sweden; D015053:Zygote / Q000187:drug effects / Q000378:metabolism
chemical_list: D004785:Environmental Pollutants; D008567:Membranes, Artificial; D009930:Organic Chemicals; D019363:Cytochrome P-450 CYP1A1