Characteristics and Sources of Polycyclic Aromatic Hydrocarbons in Ehime Prefecture

• NINOMIYA Hisashi

  Ehime Prefectural Institute of Public Health and Environmental Science

• FUJITA Shinjiro

  Ehime Prefectual Consumer Affairs Center

• UNO Katsuyuki

  Ehime Prefectural Institute of Public Health and Environmental Science

• IZUMI Yoshiko

  Ehime Prefectural Institute of Public Health and Environmental Science

• AOKI Heihachirou

  Ehime Prefectural Institute of Public Health and Environmental Science

• TAKAHASHI Shin

  Center for Marine Environmental Studies, Ehime University

• TANABE Shinsuke

  Center for Marine Environmental Studies, Ehime University

Bibliographic Information

Other Title

• 愛媛県における大気エアロゾル中多環芳香族炭化水素類（ＰＡＨｓ）の濃度レベル，変動の特徴とその起源
• エヒメケン ニ オケル タイキ エアロゾルチュウ タカン ホウコウゾク タンカ スイソルイ PAHs ノ ノウド レベル ヘンドウ ノ トクチョウ ト ソノ キゲン

Abstract

Concentrations of particulate polycyclic aromatic hydrocarbons(PAHs) in ambient air were investigated every month during the period Apr. 2004 to Mar. 2006 at two sampling sites in Ehime Prefecture; Site-N in Niihama city industrial area and Site-U in Uwajima city nonindustrial area. The sampling was carried out by high volume air sampler on quarts filters, extracted with dichloromethane and analyzed by HPLC with programmable fluorescence detection. Heavy metals and water soluble ios in particulate samples and benzene in air samples were also analyzed in this study. Annual average of total PAHs concentrations ranged from 4.5 to 4.7 ng/m³ at Site-N, higher than in Site-U (2.0∼3.4 ng/m³). Estimated risks of each PAHs based on unit risk were in the order of 10^-7∼10^-5, but overall risk was higher than objective criteria suggested by Central Environmental Council, Japan. B[a]P contributed above 50 % followed by DB[a,h]A. To have a complete knowledge on PAHs in atmosphere, their levels in the gaseous phase should also be monitored. Major source of PAHs would be vehicles especially diesel cars because of their diagnostic ratios of B[ghi]P/IP, IP/(IP+B[ghi]P) and (B[b]F+B[k]F)/B[ghi]P ranged within values reported for diesel exhausts so far. This view can be substantiated by the observed high correlation of PAHs with benzene and carbon oxide. Indexes of sources were selected by hierarchical cluster analysis on datasets of PAHs, metals and ions at Site-U which has no significant sources from industries. Then temporal variations of them and back trajectories at points in time were analyzed. It appears that high concentrations of anthropogenic metals and NH₄SO₄ are observed when the air mass was originated and passed through low-altitudes on industrial regions of China. Although PAHs showed significant correlation with these metals, they would be increased mainly by the effect of atmospheric stability.

Journal

• Journal of Environmental Chemistry

  Journal of Environmental Chemistry 18 (1), 29-42, 2008

  Japan Society for Environmental Chemistry

Keywords

• Particulate PAHs
• Risk assessment
• Source assignment
• Diagnostic ratio
• Atmospheric transport

Details

• CRID: 1390001204369188352
• NII Article ID: 10021084753
• NII Book ID: AN10547099
• DOI: 10.5985/jec.18.29
• COI: 1:CAS:528:DC%2BD1cXks1Sluro%3D
• ISSN: 18825818
• ISSN: 09172408
• NDL BIB ID: 9433488
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9433488
• Web Site: http://www.jstage.jst.go.jp/article/jec/18/1/18_1_29/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed