title: Historic trends of dechloranes 602, 603, 604, dechlorane plus and other norbornene derivatives and their bioaccumulation potential in lake ontario.
abstract: Temporal trends and seasonal variation of Dechloranes (Dec) 602, 603, 604, and Chlordene Plus (CP) in Niagara River suspended sediment, a Lake Ontario sediment core, and Lake Ontario lake trout were investigated, with Mirex and Dechlorane Plus (DP) included for comparison. Temporal concentration trends were generally consistent in each of the media for all compounds with the lowest concentrations observed in or after the late 1990s. In Niagara River suspended sediments, all compounds showed seasonal variation over a year with distinct profiles observed. The relative concentration patterns observed were total DP > Mirex > Dec 602 and Dec 604 > Dec 603 > CP in suspended sediments and sediment cores, whereas Mirex was highest in lake trout, followed by Dec 602 and DP. Dec 602 concentrations were 50 to 380 times greater than those of DP in lake trout, indicating Dec 602 has a greater bioaccumulation potential. The estimated biota-sediment accumulation factor (BSAF) for Dec 602 was much greater than for DP in Lake Ontario, and was greater than those calculated for PBDEs, indicating that assessment of some dechlorane compounds is merited if use is ongoing or planned.
authors: Department of Chemistry, Brock University , 500 Glenridge Avenue, St. Catharines, Ontario, Canada L2S 3A1.
authors: Li
authors: L
authors: Shen
authors: Eric J
authors: EJ
authors: Reiner
authors: Paul A
authors: PA
authors: Helm
authors: Chris H
authors: CH
authors: Marvin
authors: Brad
authors: B
authors: Hill
authors: Xianming
authors: X
authors: Zhang
authors: Karen A
authors: KA
authors: Macpherson
authors: Terry M
authors: TM
authors: Kolic
authors: Gregg T
authors: GT
authors: Tomy
authors: Ian D
authors: ID
authors: Brindle
mesh_terms: D000818:Animals; D004784:Environmental Monitoring; D005411:Flame Retardants / Q000032:analysis / Q000378:metabolism; D005618:Fresh Water / Q000737:chemistry*; D019015:Geologic Sediments / Q000737:chemistry; D006114:Great Lakes Region; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000378:metabolism; D009636:Norbornanes / Q000032:analysis* / Q000378:metabolism; D011083:Polycyclic Compounds / Q000032:analysis* / Q000378:metabolism; D014337:Trout / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D005411:Flame Retardants; D006843:Hydrocarbons, Chlorinated; D009636:Norbornanes; D011083:Polycyclic Compounds; D014874:Water Pollutants, Chemical; C556733:dechlorane 602; C556736:dechlorane 603; C556738:dechlorane 604; C526360:dechlorane plus