Chemical characteristics of rainwater at an urban site of south-central India

The pH variation and the chemical characteristics of rainwater have been studied during monsoons from 1999 to 2001 at Hyderabad, a city in south-central India. The pH varied from 5.5 to 7.2 with an average of 6.4 which is in alkaline range considering 5.6 as the neutral pH of cloud water with atmosp...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2003-07, Vol.37 (21), p.3019-3026
Main Authors: Kulshrestha, U.C., Kulshrestha, Monika J., Sekar, R., Sastry, G.S.R., Vairamani, M.
Format: Article
Language:English
Subjects:
Acid rain
Alkaline pH
Applied sciences
Atmospheric pollution
Calcium sulphate
Exact sciences and technology
Ion balance
Natural water pollution
Neutralization factor
Pollutants physicochemistry study: properties, effects, reactions, transport and distribution
Pollution
Rainwaters, run off water and others
Water treatment and pollution
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Summary:The pH variation and the chemical characteristics of rainwater have been studied during monsoons from 1999 to 2001 at Hyderabad, a city in south-central India. The pH varied from 5.5 to 7.2 with an average of 6.4 which is in alkaline range considering 5.6 as the neutral pH of cloud water with atmospheric CO 2 equilibrium. Out of 28 rain events, only two events were observed in acidic range (Cl −>SO 4 2+>NH 4 +>Na +>HCO 3 −>NO 3 −>K +>Mg 2+. The ratios of different components with respect to seawater ratios were observed to be higher, indicating the significant influence of non-marine sources at this site.
ISSN:1352-2310
1873-2844
DOI:10.1016/S1352-2310(03)00266-8