Fine particulate phase PAHs in ambient atmosphere of Chennai metropolitan city, India
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Rangaswamy Mohanraj1, Govindaraj Solaraj, Selvaraj Dhanakumar
1Department of Environmental Management, Bharathidasan University, Tiruchirappalli, 620024, Tamil, Nadu, India. mohan.bdu@gmail.com
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(3), while average concentration of particle-associated PAHs determined was in the range from 325.7 to 790.8 ng/m(3), 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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