Document Detail


Deposition of polycyclic aromatic hydrocarbons (PAHs) and their mass transfer coefficients determined at a trafficked site.
MedLine Citation:
PMID:  18183450     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
It is difficult to determine the deposition levels of gaseous polycyclic aromatic hydrocarbons (PAHs), as even atmospheric PAHs mainly exist in the gas phase. Gaseous PAH fluxes across the air-water interface were measured in Merinos, Bursa, Turkey. Direct gaseous fluxes of PAHs were measured intermittently for the period August 2004 through May 2005 when there was no precipitation. A modified water surface sampler (WSS), including a filter holder and an XAD-2 resin column, was employed to collect the flux samples. Average gaseous PAH flux into the WSS, determined by analyzing the XAD-2 resin column, was 31,068 +/- 16,035 ng m(-2) d(-1). This flux value was about 90% of the total (gaseous + particulate) PAH flux, which may indicate that gas exchange is a major removal mechanism for atmospheric PAHs in our sampling site. Variations in gas exchange fluxes likely resulted from changes in both meteorological conditions and concentrations whose level depends on many parameters including fuel characteristics and strength, combustion types, and their efficiencies. Vapor phase PAH fluxes were divided by ambient air concentrations measured with a high volume sampler to calculate overall gas phase PAH mass transfer coefficients (MTCs) (K(G)). The calculated average PAH MTC was 0.38 +/- 0.17 cm s(-1). The average MTC is comparable with ones calculated using a similar configuration of a WSS.
Authors:
Yücel Tasdemir; Fatma Esen
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-01-09
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  55     ISSN:  1432-0703     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-06-19     Completed Date:  2008-07-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  191-8     Citation Subset:  IM    
Affiliation:
Department of Environmental Engineering, Faculty of Engineering and Architecture, Uludag University, 16059, Gorukle/Bursa, Turkey. tasdemir@uludag.edu.tr
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants / analysis*
Chromatography, Gas
Polycyclic Hydrocarbons, Aromatic / analysis*
Turkey
Volatilization
Water Pollutants, Chemical / analysis*
Weather
Chemical
Reg. No./Substance:
0/Air Pollutants; 0/Polycyclic Hydrocarbons, Aromatic; 0/Water Pollutants, Chemical

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