Fine particulate phase PAHs in ambient atmosphere of Chennai metropolitan city, India

Mohanraj, Rangaswamy; Solaraj, Govindaraj; Dhanakumar, Selvaraj
June 2011
Environmental Science & Pollution Research;Jun2011, Vol. 18 Issue 5, p764
Academic Journal
Background: Airborne fine particulates (PM 2.5) and its associated polycyclic aromatic hydrocarbons (PAHs) are reportedly hazardous in urban environment due to the presence of multiple emission sources. Methods: In this study, fine particulates collected from fourth largest metropolitan city of India, Chennai, were extracted and analyzed for 11 PAHs by high -performance liquid chromatography equipped with a fluorescence detector. Results: PM 2.5 values varied between 27.2 and 190.2 μg/m, while average concentration of particle-associated PAHs determined was in the range from 325.7 to 790.8 ng/m, which signaled an alarming pollution level in Chennai. Conclusions: Factor analysis suggested vehicular emissions inclusive of petrol- and diesel-driven engines as probable sources.


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