Chemical Composition of PM2.5 and PM10 and Associated Polycyclic Aromatic Hydrocarbons at a Roadside and an Urban Background Area in Saitama, Japan

Asian Journal of Atmospheric Environment

Tarek Mohamed Naser¹  Kazuhiko Sakamoto¹  Qingyue Wang¹  Kazuhiko Sekiguchi¹  Yuji Yoshimura² 

[1] Department of Environmental Science and Technology, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama City, Saitama 338-8570, Japan;Japan Environmental Sanitation Center, 10-6 Yotsuyakamicho, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-0828, Japan;

关键词: diesel exhaust particles;    pahs;    traffic-related pollutants;    source profile ratio;    pm2.5;   

DOI  :  10.5572/ajae.2008.2.2.090

来源: DOAJ

【 摘 要 】

The chemical compositions of PM2.5 and PM10 and associated high-molecular-weight polycyclic aromatic hydrocarbons (PAHs) were investigated during winter and summer at a roadside and an urban background site in Saitama, Japan. The average concentrations of PM2.5 exceeded the United States Environmental Protection Agency standards during both periods. Carbonaceous components were abundant in both the observed and calculated (by means of a mass closure model) chemical composition of PM2.5. Traffic-related pollutants (elemental carbon and highmolecular-weight PAHs) were strongly associated with PM2.5 rather than with larger particles. The mass concentrations of PM2.5, as well as those of EC and PAHs associated with the particles, at the two sites were strongly correlated. Comparison of our data with source profile ratios indicates that diesel-powered vehicles were probably the main source of the measured PAHs. The PAHs concentrations were affected by meteorological conditions during our study. Our results highlight the need for the establishment of standards for PM2.5 in Japan.

【 授权许可】

Unknown