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Gas and particulate phase products from the ozonolysis of acenaphthylene

机译：ena烯臭氧分解产生的气相和颗粒相产物

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摘要

Polycyclic aromatic hydrocarbons (PAHs) are recognized as important secondary organic aerosol (SOA) precursors in the urban atmosphere. In this work, the gas-phase ozonolysis of acenaphthylene was investigated in an atmospheric simulation chamber using a proton transfer reaction time-of-flight-mass spectrometer (PTR-TOF-MS) and an aerosol time-of-flight-mass spectrometer (ATOFMS) for on-line characterization of the oxidation products in the gas and particle phases, respectively. SOA samples were also collected on filters and analyzed by ultra performance liquid chromatography/electrospray ionization high-resolution quadrupole time-of-flight mass spectrometry (UPLC/ESI-HR-QTOFMS) and gas chromatography/electron impact ionization-mass spectrometry (GC/EI-MS). The major gas-phase products included a range of oxygenated naphthalene derivatives such as 1,8-naphthalic anhydride, naphthalene 1,8-dicarbaldehyde and naphthaldehyde, as well as a secondary ozonide. Possible reaction mechanisms are proposed for the formation of these products and favoured pathways have been suggested. Many of these products were also found in the particle phase along with a range of oligomeric compounds. The same range of gas and particle phase products was observed in the presence and absence of excess cyclohexane, an OH scavenger, indicating that OH radical production from the ozonolysis of acenaphthylene is negligible. SOA yields in the range 23-37% were determined and indicate that acenaphthylene ozonolysis may contribute to part of the SOA observed in urban areas. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在城市大气中，多环芳烃（PAH）被认为是重要的次要有机气溶胶（SOA）前体。在这项工作中，使用质子转移反应飞行时间质谱仪（PTR-TOF-MS）和气溶胶飞行时间质谱仪（PTR-TOF-MS）在大气模拟室中研究了ena烯的气相臭氧分解。 （ATOFMS）分别在线表征气相和颗粒相中的氧化产物。还通过过滤器收集SOA样品并通过超高效液相色谱/电喷雾电离高分辨率四极杆飞行时间质谱（UPLC / ESI-HR-QTOFMS）和气相色谱/电子碰撞电离质谱（GC / EI-MS）。主要的气相产物包括一系列氧化的萘衍生物，例如1,8-萘酐，萘1,8-二甲醛和萘醛，以及仲臭氧化物。对于这些产物的形成，提出了可能的反应机理，并提出了有利的途径。在颗粒相中还发现了许多这些产物以及一系列低聚化合物。在存在和不存在过量的环己烷（一种OH清除剂）的情况下，观察到相同范围的气相和颗粒相产物，表明由from烯的臭氧分解产生的OH自由基可忽略不计。确定的SOA产率在23-37％的范围内，这表明urban烯臭氧分解可能有助于在城市地区观察到部分SOA。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Atmospheric environment》 |2016年第10期|104-113|共10页
  • 作者

    Riva Matthieu; Healy Robert M.; Tomaz Sophie; Flaud Pierre-Marie; Perraudin Emilie; Wenger John C.; Villenave Eric;

  • 作者单位

    Univ Bordeaux, EPOC, UMR 5805, F-33405 Talence, France|CNRS, EPOC, UMR 5805, F-33405 Talence, France|Univ Helsinki, Dept Phys, POB 64, FIN-00014 Helsinki, Finland;

    Univ Coll Cork, Dept Chem, Cork, Ireland|Univ Coll Cork, Environm Res Inst, Cork, Ireland|Ontario Minist Environm & Climate Change, Environm Monitoring & Reporting Branch, Toronto, ON, Canada;

    Univ Bordeaux, EPOC, UMR 5805, F-33405 Talence, France|CNRS, EPOC, UMR 5805, F-33405 Talence, France;

    Univ Bordeaux, EPOC, UMR 5805, F-33405 Talence, France|CNRS, EPOC, UMR 5805, F-33405 Talence, France;

    Univ Bordeaux, EPOC, UMR 5805, F-33405 Talence, France|CNRS, EPOC, UMR 5805, F-33405 Talence, France;

    Univ Coll Cork, Dept Chem, Cork, Ireland|Univ Coll Cork, Environm Res Inst, Cork, Ireland;

    Univ Bordeaux, EPOC, UMR 5805, F-33405 Talence, France|CNRS, EPOC, UMR 5805, F-33405 Talence, France;

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  • 正文语种 eng
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  • 关键词

    PAHs; Gas-phase; Atmospheric oxidation; Ozonolysis;

    机译：PAHs;气相;大气氧化;臭氧分解;

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