Variation of Polycyclic Aromatic Hydrocarbons and Nitropolycyclic Aromatic Hydrocarbons in Airborne Particulates Collected in Japanese Capital Area

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  • Suzuki Genki
    School of Phamacy, Kanazawa University, College of Medical, Pharmaceutical and Health Sciences
  • Morikawa Tazuko
    Japan Automobile Research Institute
  • Kashiwakura Kiriko
    Japan Automobile Research Institute
  • Tang Ning
    Institute of Medical, Pharmaceutical and Health Sciences, 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
  • 首都圏3地点における大気中PAH/NPAH濃度の長期変動
  • シュトケン 3 チテン ニ オケル タイキ チュウ PAH/NPAH ノウド ノ チョウキ ヘンドウ

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Abstract

Airborne particulates were collected in Noge and Kudan, Japan, in the summer and winter from 2006 to 2013 and in Tsukuba, Japan, in the summer and winter from 2010 to 2013. The polycyclic aromatic hydrocarbons (PAHs) and nitropolycyclic aromatic hydrocarbons (NPAHs) were determined by HPLC with fluorescence and chemiluminescence detections, respectively. The decreasing tendencies of the total concentrations of nine PAHs were observed at Noge and Kudan in the winter from 2006 to 2008. The decreasing tendencies of the total concentrations of three NPAHs were observed in both the summer and winter in Noge from 2006 to 2011. The decreasing tendencies of the NPAH concentrations were also observed in Kudan in the winter from 2006 to 2011 and in the summer from 2007 to 2009. The concentration ratio of 1-nitropyrene to pyrene also decreased in Noge and Kudan. As the main reason for the decrease in the urban atmospheric PAH and NPAH concentrations, the Japanese regulation of exhaust gas/particulates from automobiles was considered.

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