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Title: | Urban air PAHs: Concentrations, temporal changes and gas/particle partitioning at a traffic site in Turkey |
Authors: | Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü. Taşdemir, Yücel Esen, Fatma AAG-8469-2021 AAG-9468-2021 6603118338 10340657500 |
Keywords: | Semivolatile organic compounds Soot-air Air pollution Bursa, Turkey Ocatanol-air Partition coefficient Polycyclic aromatic hydrocarbons Bursa [Turkey] Eurasia Turkey Absorption Ambient air Atmospheric particulates Atmospheric chemistry Polycyclic aromatic hydrocarbons Air pollution Particles (particulate matter) Soot Volatile organic compounds Atmospheric pollution Octanol-air Partition coefficient Semivolatile organic compounds Concentration (composition) Industrial emission PAH Soot Traffic emission Urban atmosphere Polycyclic aromatic-Hydrocarbons Compounds Socs Semivolatile organic-compounds Dry deposition fluxes Polychlorinated-biphenyls Atmospheric-deposition Ambient air Size distribution Water-interface Vapor-pressure |
Issue Date: | Mar-2007 |
Publisher: | Elsevier Science |
Citation: | Taşdemir, Y. ve Esen, F. (2007). "Urban air PAHs: Concentrations, temporal changes and gas/particle partitioning at a traffic site in Turkey". Atmospheric Research, 84(1), 1-12. |
Abstract: | Atmospheric concentrations and gas/particle partition coefficients were determined for polycyclic aromatic hydrocarbons (PAHs) in the city of Bursa, Turkey between August 2004 and May 2005. The average total (gas + particle) PAH concentration was 456 ± 524 ng m- 3. The ambient air concentrations were mainly influenced by traffic and industrial activities. PAH compounds considered in this study predominantly existed in the gas phase and the average contribution of gas phase to total (gas + particle) PAH concentrations was about 90% which was in line with the previously reported values. The partitioning between the particle and gas phases was investigated in this study because gas/particle-partitioning coefficient (Kp) has an important role on the fate of PAHs. Experimentally determined Kp values correlated well with the subcooled liquid vapor pressures (PL0) of PAHs. The octanol-air partition coefficient (KOA), which can also be used to calculate Kp values, gave high correlation coefficients with the PL0. In another approach, the Kp values were estimated by considering adsorption onto the soot carbon and absorption into organic matter of atmospheric particulates. In general, Kp values calculated based on KOA gave smaller values than the ones predicted based on soot/air (KSA) partition coefficient. Sorption of PAHs on particles was underestimated by KOA suggesting that absorption would not be enough to explain partitioning and adsorption would still be important. |
URI: | https://doi.org/10.1016/j.atmosres.2006.04.003 https://www.sciencedirect.com/science/article/pii/S016980950600144X http://hdl.handle.net/11452/26640 |
ISSN: | 01698095 |
Appears in Collections: | Web of Science |
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