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The purpose of this study was to evaluate and compare the concentration levels and distributions of airborne polycyclic aromatic hydrocarbons (PAHs) between urban area of Győr and the nearest rural area of Sarród (Hungary). Nineteen selected polycyclic aromatic hydrocarbons (PAHs) including the 16 priority US EPA PAH compounds, 2-methylnaphthalene, benzo(j)fluoranthene and benzo(e)pyrene in PM10 aerosol samples were determined under the authority of the Government Office for Győr-Moson-Sopron County, Environmental Protection Laboratory and seasonal distributions were examined based on long-term monitoring data. Moreover, the concentration levels of fine (PM2.5) particle-associated PAHs measured in Győr in a heating season are also discussed. About 2 times higher Total PAHs concentrations were obtained for urban samples compared to the rural samples on average. All of the investigated PAH compounds were identified in the PM10 aerosol samples. PAHs fluctuate significantly in all years with higher means and peak concentrations in the winter and autumn compared to that of spring or summer times at both monitoring sites. Approximately 27 and 18 times higher benzo(a)pyrene (BaP) toxic equivalence quotient (TEQ) concentrations in PM10 in urban and rural sites were detected in the heating seasons, respectively. Acenaphthene and fluorene were not detected in the PM2.5 samples. The dominant PM2.5-bound PAH compounds were indeno(1,2,3-cd)pyrene and sum of three benzofluoranthene isomers followed by benzo(ghi)perylene and BaP. Relatively high mean TEQ concentration level were observed for PM2.5-bound PAHs in the examined heating season.

Particle-Associated PAHs in Urban and Rural Ambient Air Samples