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Seasonal Change in the Atmospheric Concentration of Particulate Polycyclic Aromatic Hydrocarbons in Ho Chi Minh City, Vietnam


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.

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We thank the staff of the General Statistics Office, Government of Vietnam, for providing meteorological data for HCMC. We also thank Dr. T. Kameda, Kanazawa University, for offering useful advice.

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Correspondence to Masao Kishida.

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Kishida, M., Mio, C., Fujimori, K. et al. Seasonal Change in the Atmospheric Concentration of Particulate Polycyclic Aromatic Hydrocarbons in Ho Chi Minh City, Vietnam. Bull Environ Contam Toxicol 83, 747–751 (2009).

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  • Ho Chi Minh City
  • Particulate PAHs
  • Dry season
  • Photolytic degradation