Determination of particle-associated PAH-quinone in Japan and China: study of the concentration levels and the occurrence processes

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  • Katayama Yuki
    Faculty of Pharmaceutical Sciences, Kanazawa University
  • Goto Tomoko
    Graduate School of Natural Science and Technology, Kanazawa University
  • Kameda Takayuki
    Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
  • Tang Ning
    Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
  • Matsuki Atsushi
    Frontier Science Organization, Kanazawa University
  • Toriba Akira
    Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
  • Hayakawa Kazuichi
    Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University

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Other Title
  • 日本および中国における大気粒子中多環芳香族炭化水素キノンの観測
  • 日本および中国における大気粒子中多環芳香族炭化水素キノンの観測--濃度レベルの把握と発生要因の検討
  • ニホン オヨビ チュウゴク ニ オケル タイキ リュウシ チュウ タカン ホウコウゾク タンカスイソ キノン ノ カンソク ノウド レベル ノ ハアク ト ハッセイ ヨウイン ノ ケントウ
  • －濃度レベルの把握と発生要因の検討－

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Abstract

Selected polycyclic aromatic hydrocarbons (PAH), nitrated PAH, and quinoid PAH (PAH-quinone) in airborne particles were simultaneously determined at Beijing, China, Osaka, Japan, and Wajima, Japan. The concentration of particle-associated 1,2-benzanthraquinone (benz[a]anthracene-7,12-dione; BAQ), a quinoid PAH, at Beijing was higher than that at Osaka and Wajima by factors of 35 and 200, respectively. Strong correlations between the BAQ and 2-nitropyrene concentrations in the summer and between the BAQ and 1-nitropyrene concentrations in the winter imply that atmospheric secondary reactions and primary emissions significantly contribute to the occurrence of atmospheric BAQ in the summer and winter, respectively. The concentration ratios of BAQ to benz[k]fluoranthene (BkF) in the summer were lower than those in the winter due to the instability of BAQ under sunlight. The BAQ/BkF ratio at Beijing in the Asian dust season was significantly higher than that in the regular spring season, suggesting that the secondary formation of BAQ is promoted by catalytic effects on the Asian dust surface.

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