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Semivolatile Organic Contaminants in the Hawaiian Atmosphere

机译：夏威夷大气中的半挥发性有机污染物

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摘要

An air sampling campaign on the Island of Hawaii aimed to assess background concentrations of semivolatile organic compounds (SVOCs) over the Central Northern Pacific and to explore their distribution along an altitudinal transect. XAD-resin-based passive air samplers were deployed from May to September 2011 at six sites along a transect from the northeastern coast to the Mauna Loa Observatory and at three other island sites. By crossing the trade wind inversion, the transect comprised the marine boundary layer and free troposphere. At the two ends of the transect, flow-through samplers simultaneously sampled air at monthly resolution. Elevated levels of dieldrin, chlordane- and DDT-related pesticides, polycyclic aromatic hydrocarbons (PAHs), and polybrominated diphenyl ethers (PBDEs) at two urban sites indicated contributions from local sources. The composition of chlordane and DDT-related residues indicated recent emissions. PAHs concentrations that decline more rapidly with increasing elevation than those for PBDEs are consistent with faster atmospheric degradation of PAHs. SVOC levels on Mauna Loa were generally at the lower end of concentration ranges reported for remote sites, including the Arctic. However, in contrast to the Arctic, long-range atmospheric transport is deemed less important than human-induced material flow as the source of SVOCs to the island's atmosphere.
机译：夏威夷大岛上的一次空气采样运动旨在评估北太平洋中部半挥发性有机化合物（SVOC）的背景浓度，并探讨它们沿垂直样带的分布。基于XAD树脂的被动空气采样器于2011年5月至9月部署在从东北海岸到莫纳罗阿天文台的一条样带的六个位置以及其他三个岛位置。通过穿越逆风，断面包括海洋边界层和自由对流层。在样带的两端，流通采样器以每月分辨率同时采样空气。在两个城市地点，狄氏剂，与氯丹和滴滴涕有关的农药，多环芳烃（PAHs）和多溴联苯醚（PBDEs）的水平升高表明了当地来源的贡献。氯丹和滴滴涕相关残留物的成分表明最近有排放。 PAHs浓度随海拔升高而下降的速度比PBDEs下降得更快，这与PAHs在大气中的降解速度更快相一致。莫纳洛阿火山的SVOC水平通常处于偏远地区（包括北极）的浓度范围的下限。但是，与北极相反，远程大气传输被认为不如人为引起的物质流作为岛上大气中的SVOC来源重要。

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  • 来源
    《Environmental Science & Technology》 |2017年第20期|11634-11642|共9页
  • 作者

    Zhang Xianming; Barnes John E.; Lei Yingduan; Wania Frank;

  • 作者单位

    Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON, Canada;

    Mauna Loa Observatory, National Oceanic and Atmospheric Administration, Hilo, HI, United States;

    Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON, Canada;

    Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON, 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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  • 正文语种 eng
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