Abstract
Polycyclic aromatic hydrocarbons (PAHs) are organic pollutants derived from pyrolysis and pyrosynthesis processes. Industrial activity, motor vehicle emission, and domestic combustion are the main sources of PAHs in the urban atmosphere. In this work, samples collected during the day and night in the urban area of Sarajevo are analyzed separately for gaseous and particle-bound PAHs; the possible origin of PAHs at the receptor site was suggested using different methods applied to the solid phase and to the total PAHs (gaseous + particulate phase). Finally, the risk level in Sarajevo associated to the carcinogenic character of the studied PAHs has been assessed. The result of this study suggests that (a) the total PAH concentrations were higher than those reported in other European cities; (b) the PAH daytime concentrations are higher than nocturnal concentrations: the sum of the PAH day/night ratios is 1.52 (gas) and 1.45 (particle phase); (c) stationary combustion and traffic were suggested to be the main sources of PAHs; (d) the average particle-bound benzo(a)pyrene (BaP) concentration (5.4 ng/m3) is higher than EU target annual value (1 ng/m3); and (e) PAH cancer risk exceeds the carcinogenic benchmark level recommended by the EPA mainly due to BaP during both the day and night periods.
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Acknowledgments
This study is a contribution to the INTERREG IIIA Project (SIMCA cod. 38) funded by the European Commission. A. Arruti would like to thank the Spanish Ministry of Education and Science for the internship period grant (BES-2007-14915, project reference CTM-2006-00317).
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De Pieri, S., Arruti, A., Huremovic, J. et al. PAHs in the urban air of Sarajevo: levels, sources, day/night variation, and human inhalation risk. Environ Monit Assess 186, 1409–1419 (2014). https://doi.org/10.1007/s10661-013-3463-1
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DOI: https://doi.org/10.1007/s10661-013-3463-1