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Influence of local sources on rainwater chemistry over Pune region, India

Budhavant, KB and Rao, PSP and Safai, PD and Ali, K (2011) Influence of local sources on rainwater chemistry over Pune region, India. Atmospheric Research, 100 (1). pp. 121-131.

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Rainwater samples were collected at five locations in the Pune region, an urban area in the south-west part of India, during 2006-2009. These locations; viz., Swargate (Traffic), Bhosari (Industrial), Pashan, Sangvi (Urban) and Sinhagad (Rural and High Altitude), represent different environments in this region. The study based on chemical analyses of these samples reveals that, on average, rainwater was alkaline at all the locations with pH values of 6.7, 6.16, 5.94, 6.04 and 5.92, respectively. Higher pH value of rainwater at the traffic location than those at the other locations is due mainly to the abundance of Ca 2- caused by vehicle-driven road-side dust. The maximum SO 4 2- and NO 3 - concentrations were found at Bhosari and Swargate respectively caused by local industrial and vehicular emissions. The average Fractional acidity over Pune area is 0.024, indicating about 98 acidity is neutralized by alkaline constituents. Factor analysis of the results indicated the influence of various sources, such as anthropogenic, soil dust, sea salt and biomass burning.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: Biomass-burning; Factor analysis; High altitude; Ion balance; Local source; Long range transport; Neutralization; pH value; Rainwater; Rainwater chemistry; Rainwater samples; Sea salts; Soil dust; Urban areas; Vehicular emission, Chemical analysis; Dust; Industrial emissions; pH, Acidity, acidity; alkalinity; atmospheric chemistry; chemical analysis; concentration (composition); dust; ion; long range transport; neutralization; pH; rainwater; urban atmosphere, India; Maharashtra; Pune
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 14 Aug 2014 10:51
Last Modified: 14 Aug 2014 10:51

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