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POLYCYCLIC AROMATIC HYDROCARBONS IN AMBIENT AIR PARTICLES IN THE CITY OF KONYA/TURKEY
Abstract
Ambient particulate matter contains numerous organic species, including several polycyclic aromatic hydrocarbons (PAHs) that are known or suspected carcinogens. Atmospheric particles were collected using low-volume sampler on glass fiber filters among August 2007-June 2008. The study area is under the influence of heavy traffic. Filter samples were extracted with petroleum ether /n-hexane by ultrasonic agitation, concentrated, and measured at trace levels using gas chromatography–mass spectrometry. The method was evaluated for sensitivity, recovery, precision. Total PAH concentrations in the atmospheric particles were found to be 0.0001-2.898 $\mu$g m-3. Seasonal variations of 26 polycyclic aromatic hydrocarbons (PAHs) in the TSP (total suspended particles) of Konya city were determined. In[123]Py/B[gih]P, B[a]Py/B[gih]P, B[e]Py/(B[a]Py+B[e]P), and Flua/(Flua+Pyre) ratios were calculated; the results suggest a typical traffic exhaust source in central Konya during warm period . Perylene, coronene and phenanthrene were found to be the most abundant PAHs in airborne particles. Correlation studies between PAHs concentrations and meteorological parameters were revealed that temperature has greater effects than other meteorological parameters such as wind speed, relative humidity and atmospheric pressure on PAHs. Total PAHs had positive correlations with humidity and atmospheric pressure (R=0.469 and 0.701 respectively) while negative correlations were observed with wind power and air temperature (R=0.378 and 0.755 respectively).
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References16
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