Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/26929
Title: Status of Acid Rain in India and Study on Rainwater Composition at Gopalpura (Agra)
Authors: Satsangi, Gur Sumiran
Rani, Abha
Kumar, Ranjit
Singh, Shashi Pal
Lakhani, Anita
Kumari, K. Maharaj
Srivastava, Soami Saran
Issue Date: Jun-2000
Publisher: NISCAIR-CSIR, India
Abstract: The presence of some strong (H2SO4 , HNO3 and HCI) ,and weak acids (acetic and formic acids) in atmosphere causes acidic rain. Industrialization and urbanization  have resulted in rapid increase in SO2 and NOx concentrations in atomophere. These species (SO2 and NOx) react with different atmospheric radicals and are converted to H2SO4 and HNO3. Deposition of these acids results in acidification of soil, ground water and lakes and causes adverse effect on human beings both directly and indirectly. In India, pH of rainwater varies from 4.8 to 7.4 which signifies both acidic and alkaline nature of rain water. The pH of rainwater is 4.5 and 4.8 at Chemhur (Mumbai) and Korba (M.P.), respectively. The pH values are high (> 7.0) at Srinagar, Bikaner, Allahabad, Ahmedahad, Jodhpur and Amritsar while comparatively low (pH 6.0-7.0) at Delhi,  Bhopal, Gopalpura (Agra), Vishakhapatnam, etc. At places like Nilgiri, pH is 5.3 and in Tuticorin and Trivandrum pH is 5.7. As continental air masses (natural source) influence rains in India, hence the pH of rainwater is alkaline in nature in some regions. The acidity of rainwater is neutralized by alkaline ions (Ca2+, Mg2+ and NH+). In rain water of Gopalpura, the neutralization factors for Ca2+, Mg2+ and NH+ have been found to be 0.80, 0.53 and 0.89 respectively. Hence, Ca2+ and NH+ play an important role in neutralizing acidity. Similar observations have been found at Delhi and Agra.
Page(s): 15-22
URI: http://hdl.handle.net/123456789/26929
ISSN: 0975-2412 (Online); 0771-7706 (Print)
Appears in Collections:BVAAP Vol.08(1) [June 2000]

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