Seasonal change in the atmospheric concentration of particulate polycyclic aromatic hydrocarbons in Ho Chi Minh City, Vietnam Kishida M., Mio C., Fujimori K., Imamura K., Takenaka N., Maeda Y., Lan T.T.N., Shibutani Y., Bandow H. Research Institute for Environment, Agriculture, and Fisheries, Osaka Prefectural Government, 1-3-62 Nakamichi, Higashinari-ku, Osaka 537-0025, Japan; College of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan; Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan; College of Natural Science, Vietnam National University of Ho Chi Minh City, 227 Nguyen Van Cu Str., Dist. 5, Ho Chi Minh City, Viet Nam; Environmental Management Division, Department of Environment, Agriculture, and Fisheries, Osaka Prefectural Government, 2-1-2 Otemae, Chuo-ku, Osaka 540-0008, Japan Abstract: We analyzed atmospheric particulate polycyclic aromatic hydrocarbons (PAHs) in Ho Chi Minh City, Vietnam, for 19 months. The average concentrations of total PAHs at dry and rainy seasons were 4.28 ± 2.83 and 15.71 ± 8.21 ng m-3, respectively. The use of motorcycles without catalytic converters, estimated to be main emission sources of PAHs, would be higher during the dry season. PAH concentrations show a negative correlation with sunshine duration (r = -0.51). Furthermore, the ratio of average PAH concentration in the dry season to that in the rainy season shows a positive correlation with photolytic half-life (r = 0.94). Thus, seasonal changes in PAH concentrations are attributable to their photolytic degradation. © 2009 Springer Science+Business Media, LLC. Author Keywords: Dry season; Ho Chi Minh City; Particulate PAHs; Photolytic degradation Index Keywords: Atmospheric concentration; Atmospheric particulate; Average concentration; Dry season; Dry seasons; Emission sources; Ho Chi Minh City; Negative correlation; Particulate PAHs; Photolytic degradation; Positive correlations; Rainy seasons; Seasonal changes; Sunshine duration; Viet Nam; Atmospheric composition; Catalytic converters; Concentration (process); Degradation; Drought; Holmium; Organic compounds; Polycyclic aromatic hydrocarbons; Aromatic hydrocarbons; polycyclic aromatic hydrocarbon; article; catalysis; exhaust gas; meteorology; particulate matter; photolysis; seasonal variation; Viet Nam; Air Pollutants; Polycyclic Compounds; Seasons; Vietnam Year: 2009 Source title: Bulletin of Environmental Contamination and Toxicology Volume: 83 Issue: 5 Page : 747-751 Cited by: 1 Link: Scorpus Link Chemicals/CAS: Air Pollutants; Polycyclic Compounds Correspondence Address: Kishida, M.; Environmental Management Division, Department of Environment, Agriculture, and Fisheries, Osaka Prefectural Government, 2-1-2 Otemae, Chuo-ku, Osaka 540-0008, Japan; email: kishida82477@iris.eonet.ne.jp ISSN: 74861 CODEN: BECTA DOI: 10.1007/s00128-009-9779-4 PubMed ID: 19471847 Language of Original Document: English Abbreviated Source Title: Bulletin of Environmental Contamination and Toxicology Document Type: Article Source: Scopus Authors with affiliations: 1. Kishida, M., Research Institute for Environment, Agriculture, and Fisheries, Osaka Prefectural Government, 1-3-62 Nakamichi, Higashinari-ku, Osaka 537-0025, Japan, Environmental Management Division, Department of Environment, Agriculture, and Fisheries, Osaka Prefectural Government, 2-1-2 Otemae, Chuo-ku, Osaka 540-0008, Japan 2. Mio, C., College of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan 3. Fujimori, K., College of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan 4. Imamura, K., Research Institute for Environment, Agriculture, and Fisheries, Osaka Prefectural Government, 1-3-62 Nakamichi, Higashinari-ku, Osaka 537-0025, Japan 5. Takenaka, N., Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan 6. Maeda, Y., Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan 7. 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