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首页> 外文期刊>Environmental Science & Technology >Multiyear Measurements of Flame Retardants and Organochlorine Pesticides in Air in Canada's Western Sub-Arctic
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Multiyear Measurements of Flame Retardants and Organochlorine Pesticides in Air in Canada's Western Sub-Arctic

机译：加拿大西部亚北极地区空气中的阻燃剂和有机氯农药的多年测量

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摘要

Fourteen polybrominated diphenyl ethers (PBDEs), 14 non-BDE flame retardants (FRs), and 25 organochlorine pesticides (OCPs) were analyzed in air samples collected at Little Fox Lake (LFL) in Canada's Yukon Territory from August 2011 to December 2014. LFL is a long-term monitoring station operated under the Northern Contaminants Program (NCP) and one of only a few stations that contribute to the assessment of air pollution levels and pathways to the sub-Arctic region. BDE-47 was the most abundant congener among the 14 PBDEs, followed by BDE-99. Non-BDE FRs pentabromotoluene (PBT) and dechlorane plus (DP) were detected in all the samples. Dechlorane 602, 2,3-dibromo- propyl-2,4,6-tribromophenyl ether (DPTE), hexabromoben- zene (HBB), and 2-ethylhexyl-2,3,4,S-tetrabromobenzoate (EH-TBB) were also detected in ＞75% of all samples. PBDEs have shown a decreasing tendency as of 2013, which may reflect the phase-out of penta- and octa-BDE mixtures has led to significant decline in the atmosphere. The highest concentrations of OCPs were observed for hexachlorobenzene (HCB), with a median concentration of 61 pg/m~3, followed by a- hexachlorocyclohexane (α-HCH) and α-endosulfan. Potential source contribution function (PSCF) highlights Northern Canada, Pacific, and East Asia as potential sources in warm seasons; whereas in cold seasons, the chemicals mainly came from the Pacific Rim.
机译：2011年8月至2014年12月，在加拿大育空地区小狐湖（LFL）收集的空气样本中分析了14种多溴联苯醚（PBDEs），14种非BDE阻燃剂（FRs）和25种有机氯农药（OCP）。是根据北部污染物计划（NCP）运营的一个长期监测站，并且是为评估空气污染水平和通往亚北极地区的途径而做出的贡献的少数几个监测站之一。 BDE-47是14种PBDE中最丰富的同类物，其次是BDE-99。在所有样品中均检测到非BDE FRs五溴甲苯（PBT）和十氯烷（DP）。分别用十氯烷602、2,3-二溴丙基-2,4,6-三溴苯醚（DPTE），六溴苯（HBB）和2-乙基己基-2,3,4，S-四溴苯甲酸酯（EH-TBB）在所有样本中，＞ 75％的样本中也检测到了。截至2013年，多溴二苯醚显示出下降的趋势，这可能反映出五溴二苯醚和八溴二苯醚混合物的逐步淘汰已导致大气中的显着下降。六氯苯（HCB）的OCP浓度最高，中位浓度为61 pg / m〜3，其次是α-六氯环己烷（α-HCH）和α-硫丹。潜在来源贡献函数（PSCF）强调了加拿大北部，太平洋和东亚地区是温暖季节的潜在来源；而在寒冷季节，化学品主要来自环太平洋地区。

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  • 来源
    《Environmental Science & Technology》 |2015年第14期|8623-8630|共8页
  • 作者

    Yong Yu; Hayley Hung; Nick Alexandrou; Pat Roach; Ken Nordin;

  • 作者单位

    Air Quality Processes Research Section, Environment Canada, Toronto, Ontario M3H 5T4, Canada;

    Air Quality Processes Research Section, Environment Canada, Toronto, Ontario M3H 5T4, Canada;

    Air Quality Processes Research Section, Environment Canada, Toronto, Ontario M3H 5T4, Canada;

    Aboriginal Affairs and Northern Development Canada, Whitehorse, Yukon Y1A 2B5, Canada;

    Laberge Environmental Services, Whitehorse, Yukon Y1A 2S5, 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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