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首页> 外文期刊>Environmental toxicology and chemistry >BROMINATED AND CHLORINATED FLAME RETARDANTS IN LAKE ONTARIO, CANADA, LAKE TROUT (SALVELINUS NAMAYCUSH) BETWEEN 1979 AND 2004 AND POSSIBLE INFLUENCES OF FOOD-WEB CHANGES
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BROMINATED AND CHLORINATED FLAME RETARDANTS IN LAKE ONTARIO, CANADA, LAKE TROUT (SALVELINUS NAMAYCUSH) BETWEEN 1979 AND 2004 AND POSSIBLE INFLUENCES OF FOOD-WEB CHANGES

机译：1979年至2004年之间加拿大安大略湖安大略鳟鱼（SALVELINUS NAMAYCUSH）的溴化和氯化阻燃剂及食物网变化的可能影响

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摘要

Concentrations of non-polybrominated diphenyl ether (PBDE) brominated (hexabromocyclododecane [HBCD], 1,2-bis[2,4,6-tribromophenoxy]ethane [BTBPE], and pentabromoethylbenzene [PEB]) and chlorinated (Dechlorane Plus [DP] as well as short- and medium-chain chlorinated paraffins [SCCP and MCCP, respectively]) flame retardants were evaluated in archived Lake Ontario, Canada, lake trout (Salvelinus namaycush) samples collected between 1979 and 2004. Polybrominated diphenyl ethers also were analyzed to provide a point of reference for comparison to previous studies. Concentrations of the dominant PBDE congeners (BDEs 28, 47, 99, 100, 153, and 154) increased significantly from 1979 until the mid-1990s, then either leveled off or decreased significantly between 1998 and 2004, a result that corresponds to those of previous studies. In contrast, BDE 209 increased approximately fourfold between 1998 and 2004. The temporal trends of the non-PBDE flame retardants varied, with sum (Σ) HBCD and DP showing significant overall decreases; BTBPE, ΣSCCP, and ΣMCCP showing parabolic trends; and PEB showing no overall change during the study period. Because many of the non-PBDE chemicals may be used as replacements for penta- and octa-BDE mixtures, these results will provide a baseline to evaluate future usage patterns. Possible changes in food-web structure, evaluated through stable nitrogen isotopes (δ~(15)N), may be influencing our interpretations of contaminant trends in lake trout and are hypothesized to be partially responsible for the observed decrease in concentrations of BDEs 28, 47, 99, 100, 153, and 154 between 1998 and 2004. Retrospective analyses evaluating temporal trends in stable isotope values at the base of the food web, however, are recommended to test this hypothesis further.
机译：溴化（六溴环十二烷[HBCD]，1,2-双[2,4,6-三溴苯氧基]乙烷[BTBPE]和五溴乙苯[PEB]）和氯化（去氯烷加[DP]）的非多溴二苯醚（PBDE）的浓度以及在加拿大安大略湖归档的1979年至2004年湖鳟（Salvelinus namaycush）样品中评估了阻燃剂以及短链和中链氯化石蜡[分别为SCCP和MCCP]的阻燃剂。还对多溴联苯醚进行了分析为与以前的研究进行比较提供参考。从1979年到1990年代中期，主要的多溴二苯醚同系物（BDEs 28、47、99、100、153和154）的浓度显着增加，然后在1998年至2004年间趋于稳定或显着下降，这一结果与之前的学习。相比之下，BDE 209在1998年至2004年之间增加了大约四倍。非PBDE阻燃剂的时间趋势有所不同，六溴环十二烷总和（Σ）和六溴环十二烷总体呈显着下降趋势。 BTBPE，ΣSCCP和ΣMCCP显示抛物线趋势； PEB在研究期间没有整体变化。由于许多非多溴二苯醚化学品可被用作五溴和八溴二苯醚混合物的替代品，因此这些结果将为评估未来的使用方式提供基准。通过稳定的氮同位素（δ〜（15）N）评估的食物网结构可能发生变化，可能会影响我们对湖泊鳟鱼污染物趋势的解释，并被认为部分归因于观察到的BDEs浓度降低28，在1998年至2004年之间分别为47、99、100、153和154。建议对食物网底部稳定同位素值的时间趋势进行回顾性分析，以进一步验证该假设。

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  • 来源
    《Environmental toxicology and chemistry》 |2009年第5期|910-920|共11页
  • 作者

    Nargis Ismail; Sarah B. Gewurtz; Kerri Pleskach; D. Michael Whittle; Paul A. Helm; Chris H. Marvin; Gregg T. Tomy;

  • 作者单位

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada;

    Department of Chemistry, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario M9P 3V6, Canada Ontario Ministry of the Environment, Environmental Monitoring and Reporting Branch, 125 Resources Road, Toronto, Ontario M9P 3V6, Canada;

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada;

    Department of Fisheries and Oceans, Great Lakes Laboratory for Fisheries Aquatic and Sciences, 867 Lakeshore Road, Burlington, Ontario L7R 4A6;

    Ontario Ministry of the Environment, Environmental Monitoring and Reporting Branch, 125 Resources Road, Toronto, Ontario M9P 3V6, Canada;

    Environment Canada, National Water Research Institute, 867 Lakeshore Road, Burlington, Ontario L7R 4A6;

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada Departments of Chemistry and Environment and Geography, University of Manitoba, Winnipeg, Manitoba R3T 2N6, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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