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首页> 外文期刊>Environmental Science & Technology >Temporal Variations of Polybrominated Dibenzo-p-Dioxin and Methoxylated Diphenyl Ether Concentrations in Fish Revealing Large Differences in Exposure and Metabolic Stability
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Temporal Variations of Polybrominated Dibenzo-p-Dioxin and Methoxylated Diphenyl Ether Concentrations in Fish Revealing Large Differences in Exposure and Metabolic Stability

机译：鱼类中多溴二苯并二恶英和甲氧基化二苯醚浓度的时间变化揭示了暴露和代谢稳定性方面的巨大差异

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摘要

The concentrations of polybrominated dibenzo-p-dioxins (PBDDs) and polybrominated methoxylated diphenyl ethers(MeO-PBDEs)were investigated in perch (Perca fluviatilis) collected from a Baltic Sea background contaminated area between 1990 and 2005. No temporal trend was found, but large variations were observed - up to 5-fold and 160-fold differences in MeO-PBDE and PBDD concentrations, respectively - between consecutive years, suggesting that retention of these compounds, particularly the PBDDs, is limited. Examination of the congener profiles using principal component analysis (PCA) and correlation analysis indicated that MeO-PBDEs without adjacent substituents (6-Me0-BDE47) or with two adjacent substituents (2'-MeO-BDE68 and 6-MeO-BDE90) are retained more than MeO-PBDEs with three adjacent substituents (6-MeO-BDE85 and 6-Me0-BDE99) and that 1,3,6,8-tetraBDD and 1,3,7,9-tetraBDD are retained more than the other PBDDs which have vicinal hydrogen. Denomination could explain the limited retention of 6-MeO-PBDE85 and 6-Me0-BDE99 and the absence of 2-Me0-BDE123 and 6-MeO-BDE137, and cytochrome P-450 mediated oxidation could explain the limited retention of PBDDs containing vicinal hydrogen. The levels of organobromines, especially MeO-PBDEs, were found to covary with water conditions related to primary production, for example temperature, depth visibility, and inorganic nutrient concentrations, which also favor fish productivity. The results suggest natural production of MeO-PBDEs and PBDDs and imply that they fluctuaternconsiderably over time, as do common marine toxins in fish. Thus, assessments of human and environmental risk should consider both the average and peak concentrations of these contaminants in marine biota.
机译：在1990年至2005年之间从波罗的海本底污染地区收集的鲈鱼（Perca fluviatilis）中调查了多溴二苯并对二恶英（PBDDs）和多溴甲氧基二苯醚（MeO-PBDEs）的浓度。未发现时间趋势，但连续几年之间观察到较大的差异-MeO-PBDE和PBDD的浓度差异分别高达5倍和160倍，这表明这些化合物（尤其是PBDD）的保留受到限制。使用主成分分析（PCA）和相关分析对同类物谱进行的检验表明，没有相邻取代基（6-Me0-BDE47）或带有两个相邻取代基（2'-MeO-BDE68和6-MeO-BDE90）的MeO-PBDEs是保留了多于三个相邻取代基（6-MeO-BDE85和6-Me0-BDE99）的MeO-PBDEs，并且1,3,6,8-tetraBDD和1,3,7,9-tetraBDD保留得比另一个多具有邻近氢的PBDD。衡量单位可以解释6-MeO-PBDE85和6-Me0-BDE99的保留有限，而没有2-Me0-BDE123和6-MeO-BDE137的保留，而细胞色素P-450介导的氧化可以解释包含邻位的PBDD的保留有限。氢。发现有机溴，尤其是MeO-PBDEs的含量与与初级生产有关的水质条件有关，例如温度，深度能见度和无机养分浓度，这也有利于鱼类生产力。结果表明，MeO-PBDEs和PBDDs自然产生，并且暗示它们会随着时间波动很大，鱼类中常见的海洋毒素也是如此。因此，对人类和环境风险的评估应同时考虑海洋生物群中这些污染物的平均浓度和峰值浓度。

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  • 来源
    《Environmental Science & Technology》 |2010年第7期|p.2466-2473|共8页
  • 作者

    PETER HAGLUND; KARIN LOEFSTRAND; ANNA MALMVAERN; ANDERS BIGNERT; LILLEMOR ASPLUND;

  • 作者单位

    Department of Chemistry, Umea University, SE-901 87 Umea, Sweden;

    rnEnvironmental Chemistry Unit, Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden;

    rnEnvironmental Chemistry Unit, Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden Department of Applied Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden;

    rnContaminant Research Group, Swedish Museum of Natural History, Box 50007, 104 05 Stockholm, Sweden;

    rnDepartment of Applied Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden;

  • 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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