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首页> 外文期刊>Environmental Science & Technology >Decadal Differences in Emerging Halogenated Contaminant Profiles in Great Lakes Top Predator Fish
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Decadal Differences in Emerging Halogenated Contaminant Profiles in Great Lakes Top Predator Fish

机译：伟大的湖泊顶部捕食者鱼中出现卤化污染物谱的二等差异

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摘要

Legacy halogenated contaminants have been monitored in the Great Lakes for decades, but there are many additional unknown halogenated contaminants potentially affecting the Great Lakes ecosystem. To address this concern, lake trout (Salvelinus namaycush) were collected in 2005/2006 and 2015/2016 from each lake and screened for previously unidentified compounds. The isotopic profile deconvoluted chromatogram algorithm was used to isolate unknown halogenated components using high-resolution mass spectrometry data files generated by an atmospheric pressure gas chromatography-quadrupole time-of-flight mass spectrometer operated in positive and negative modes. The temporal and spatial differences in the newly detected features were used to isolate new potential contaminants. Decadal differences in the unknown halogenated compounds (or features) were compared with the total polychlorinated biphenyl concentration trends. Greater than 2000 unknown halogenated features were detected. As expected, Lake Superior contained the lowest number of unknown halogenated features, whereas Lake Ontario contained the highest. Unknown features tended to have fewer Cl and/or Br atoms compared to traditional legacy contaminant features typically monitored. Diverse patterns of unknown halogenated compounds between lakes suggested that there continues to be unidentified sources of halogenated contaminants in the Great Lakes missed by current monitoring programs.
机译：几十年来，在大湖泊中监测了遗留卤化污染物，但有许多额外的未知卤化污染物可能影响大湖泊生态系统。为了解决这一问题，从每个湖泊的2005/2006年和2015/2016收集了湖泊（Salvelinus Namaycush），并筛选出以前未识别的化合物。同位素谱去酚醛化色谱图算法用于使用由阳性和负模式操作的大气压气相色谱 - 四极性质谱仪产生的高分辨率质谱数据文件分离未知的卤化组分。新检测到的特征中的时间和空间差异用于分离新的潜在污染物。将未知卤化化合物（或特征）的二种差异与总多氯联苯浓度趋势进行比较。检测到大于2000年未知的卤化特征。正如预期的那样，湖泊优越含有最低数量的未知卤化功能，而安大略湖湖则含有最高。与通常监测的传统遗留污染物特征相比，未知的特征往往具有更少的Cl和/或Br原子。湖泊之间的不同卤化化合物的不同模式表明，目前监测计划错过的大湖泊中仍然存在未识别的卤化污染物来源。

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  • 来源
    《Environmental Science & Technology》 |2020年第22期|14352-14360|共9页
  • 作者

    Sadjad Fakouri Baygi; Sujan Fernando; Philip K. Hopke; Thomas M. Holsen; Bernard S. Crimmins;

  • 作者单位

    Department of Chemical and Biomolecular Engineering Clarkson University Potsdam New York 13699 United States;

    Center for Air Resources Engineering and Science Clarkson University Potsdam New York 13699 United States;

    Department of Chemical and Biomolecular Engineering Clarkson University Potsdam New York 13699 United States;

    Department of Civil and Environmental Engineering Clarkson University Potsdam New York 13699 United States;

    Department of Civil and Environmental Engineering Clarkson University Potsdam New York 13699 United States AEACS LLC New Kensington Pennsylvania 15068 United States;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Non-targeted analysis;

    机译：非目标分析;

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