P.S. Rao

National Environmental Engineering Research Institute, Ajni, Maharashtra, India

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Publications (3)6.22 Total impact

  • P.S. Rao · M.F. Ansari · A.G. Gavane · V.I. Pandit · P Nema · S Devotta ·
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    ABSTRACT: Petroleum refineries are largest chemical industries that are responsible for the emission of several pollutants into the atmosphere. Benzene is among the most important air pollutants that are emitted by petroleum refineries, since they are involved in almost every refinery process. Volatile organic compounds (VOCs) are a major group of air pollutants, which play a critical role in atmospheric chemistry. These contribute to toxic oxidants, which are harmful to ecosystem, human health and atmosphere. The variability of pollutants is an important factor in determining human exposure to these chemicals. The ambient air concentrations of benzene were measured in several sites around the Digboi petroleum refinery, near the city of Gowahati in northeast India, during winter and summer 2004. The seasonal and spatial variations of the ambient air concentrations of this benzene were investigated and analyzed. An estimation of the contribution of the refinery to the measured atmospheric levels of benzene was also performed. The ambient air mixing ratios of benzene in a large area outside the refinery was generally low, in ppbv range, much lower than the ambient air quality standards. This article presents the temporal and spatial variation of air pollution in and around petroleum refinery and showed that no health risk due to benzene is present in the areas adjacent to the refinery.
    Environmental Monitoring and Assessment 06/2007; 128(1-3):323-8. DOI:10.1007/s10661-006-9315-5 · 1.68 Impact Factor
  • P S Rao · M F Ansari · C P Gajrani · A Kumar · P Nema · S Devotta ·
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    ABSTRACT: No abstract available.
    Bulletin of Environmental Contamination and Toxicology 09/2006; 77(2):274-81. DOI:10.1007/s00128-006-1060-5 · 1.26 Impact Factor
  • A.D. Bhanarkar · P.S. Rao · D.G. Gajghate · P. Nema ·
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    ABSTRACT: A comprehensive and spatial emission inventory was carried out for sulphur dioxide (SO2), particulate matter (PM) and toxic metals from industrial sources in Greater Mumbai, India. Fuel consumption database was developed for industrial sources. Emission factors for various pollutants were compiled from the literature, scrutinized and used appropriately as applicable under Indian conditions. Emissions of SO2, PM and toxic metals were estimated for 2001–02 and extrapolated to 2010. SO2 emissions from fossil fuel combustion covering 215 point sources for 2001–02 were computed as 55.591 Gg y−1 whereas those for PM were calculated as 9.794 Gg y−1. The total metal emissions from industrial sources were computed as 0.375 Gg y−1. Total fossil fuel energy consumption in industrial sector during 2001–02 was 145 PJ, which included fuel consumption (29%) in power plants. Amongst the industries, thermal power plants (TPP) were the major source of emissions in the region contributing 27% share towards SO2, 19% PM and 62% metals. Projected scenario for 2010 indicates that there would be substantial reduction in PM and metal emission load while the gaseous pollutant concentration would show a decreasing trend.
    Atmospheric Environment 07/2005; 39(21-39):3851-3864. DOI:10.1016/j.atmosenv.2005.02.052 · 3.28 Impact Factor