Determination of mass transfer rates and deposition levels of polycyclic aromatic hydrocarbons (PAHs) using a modified water surface sampler

Developmental Biology

Esen Fatma²  Tasdemir Yucel¹  Cindoruk S. Siddik² 

[1]Department of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical University, Davutpasa Campus, 34210 Esenler, Istanbul, Turkey$$

[2]Department of Environmental Engineering, Faculty of Engineering and Architecture, Uludag University, 16059 Gorukle/Bursa-Turkey$$

关键词: Dry deposition;    Deposition velocity;    Flux;    Mass transfer coefficient;    Turkey;   

DOI  :  10.5094/APR.2010.023

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

There are different approaches to determine dry deposition velocities (V_d) and mass transfer coefficients (K_G) of individual polycyclic aromatic hydrocarbons (PAHs). A modified water surface sampler (MWSS) and a high volume air sampler were concurrently used to determine Vd and K_G in this study. Ambient air and deposition samples were collected from August 2004 to May 2005 in Bursa, Turkey. The mean particle-phase dry deposition flux of PAHs was 890±520 ng/m² d, while the mean gas-phase PAH flux was 5 060±4 260 ng/m² d. The ratio between fluxes and air concentration values was used in calculation of Vd and K_G. The average calculated V_d and K_G values for PAH compounds were 0.52±0.36 cm/s and 0.69±0.41 cm/s, respectively. Despite the fluctuation on seasonal atmospheric concentrations due to regional sources and meteorological conditions, there was no significant difference on deposition velocities and mass transfer rates. K_G was also calculated using some models reported in the literature and models developed using the MWSS. The predicted K_G determined by models developed using the MWSS was 0.59±0.02 cm/s showing a close agreement with the experimentally measured values.

【 授权许可】

Unknown   

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