Secondary Organic Aerosol Formations during Atmospheric Oxidation of Aromatic Hydrocarbons

DOI Web Site 24 References
  • SATO Kei
    National Institute for Environmental Studies
  • KLOTZ Björn
    National Institute for Environmental Studies Cognis Deutschland GmbH & Co KG
  • HATAKEYAMA Shiro
    National Institute for Environmental Studies Tokyo University of Agriculture and Technology
  • IMAMURA Takashi
    National Institute for Environmental Studies

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Other Title
  • 芳香族炭化水素の大気酸化による二次有機エアロゾル生成
  • ホウコウゾク タンカ スイソ ノ タイキ サンカ ニ ヨル 2ジ ユウキ エアロゾル セイセイ

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Abstract

The photooxidation of aromatic hydrocarbons (AHCs) is one of the potential sources of secondary organic aerosol (SOA) in urban air, but the explicit reaction mechanisms of these SOA formations have not been elucidated. In this study, we measured SOA yields during oxidation of four AHCs from a series of laboratory experiments. The SOA yields from toluene, p-ethyltoluene, p-xylene and 1,3,5-trimethylbenzene were 0.07-0.11, 0.06-0.10, 0.02-0.04 and 0.02-0.03, respectively; the SOA yield from each AHC depended on the initial AHC concentration. On the basis of a previous reaction mechanism, in which condensable products are assumed to be formed by secondary reactions of primary oxidation products with ozone, the SOA concentrations were calculated and compared with the experimental results. As for each AHC, SOA yields measured at different initial AHC concentrations could be explained by assuming that the overall yield of primary oxidation products which forms SOA is constant being independent of the initial AHC concetration.

Journal

  • Earozoru Kenkyu

    Earozoru Kenkyu 23 (2), 86-93, 2008

    Japan Association of Aerosol Science and Technology

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