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IJRSP Vol.37(6) [December 2008] >


Title: Chemical composition of rainwater in Panipat, an industrial city in Haryana
Authors: Tiwari, S
Srivastava, Manoj K
Bisht, Deewan Singh
Keywords: Rainwater chemistry
Ion concentration
Issue Date: Dec-2008
Publisher: CSIR
Abstract: Chemical composition of rainwater at Panipat, an industrial city in India, during the south-west monsoon seasons 2003-2005 has been studied. The collected samples have been analyzed for major anions, cations and pH along with conductivity. The volume weighted pH of rainwater varied from 5.02 to 6.86 with a mean value of 5.51, which is slightly acidic. About 37% of rain samples were observed to be acidic due to high SO₂ emissions from industries. The trend of average ionic concentration in precipitation (μeq/l) showed SO₄²⁻> Ca²⁺> NH₄⁺> Cl⁻> NO₃⁻> Na⁺> Mg²+> F⁻> K⁺ >HCO₃⁻. The percentage contribution to the total ionic concentration is found to be 51% to cations and 49% to anions. Sulphate, calcium and ammonium shared maximum contribution. Major part of sulphate ion in rainwater at Panipat was of anthropogenic origin, i.e. by the oxidation of sulphur dioxide emitted from burning of fossil fuels from thermal power plant, oil refinery, fertilizer plant, etc. The major source of nitrate was biomass burning, automobile and soil. Ammonium in precipitation was due to bacterial action on nitrogen compounds in the soil, urine and from industrial sources. The ratio of sea salt (Na+ and Cl⁻) was equal to the seawater, suggesting that it was mostly influenced by marine air.
Page(s): 443-449
ISSN: 0367-8393
Source:IJRSP Vol.37(6) [December 2008]

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