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Assessment of Potential Toxic Fraction in Atmospheric Aerosols in Rural Environment

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Author Affiliations

  • 1National Environmental Engineering Research Institute (NEERI), Nehru Marg, Nagpur-440 020, M.S., INDIA

Res.J.chem.sci., Volume 5, Issue (5), Pages 56-60, May,18 (2015)

Abstract

Polycyclic aromatic hydrocarbon (PAHs) has been recognized as carcinogenic and mutagenic environmental pollutants in the atmosphere. They are the products of incomplete combustion of fossil fuels such as petroleum, coal and other organic materials from natural and anthropogenic sources in the rural and urban atmosphere. Eight PAHs were determined in PM10 collected at rural environment using Respirable sampler during winter, summer and post-monsoon seasons. The filters were extracted in ultrasonic bath with dichloromethane and analyzed by fluorescence technique. The total PAHs concentration varied from 2.67-17, 2.51-3.79 and 1.63-3.59 ng m-3during winter, summer and post-monsoon season respectively. The benzo(a)pyrene and chrysene were found to be associated with particulate during all the seasons. The diagnostic ratio suggest that PAHs emissions were predominantly associated with coal, wood and biomass burning in rural environment. The higher toxic fraction observed during summer (53.8%) are probable human carcinogens associated with aerosols. Toxic equivalency factor (TEFs) of BaP estimated and expressed as BaPeq was low in concentration. The study could be of great significance for the planners while considering the environmental remedial measures.

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