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Source identification and variation in the chemical composition of rainwater at coastal and industrial areas of India

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Title Source identification and variation in the chemical
composition of rainwater at coastal and industrial
areas of India
 
Creator Salve, P R
Gobre, T
Lohakare, H
Krupadam, R J
Bansiwal, A.
Ramteke , D S
Wate, S R
 
Subject Water Quality
Water Pollution
 
Description Studies on precipitation chemistry were carried out to understand the nature and
sources of rainwater at Rameswaram and NTPC Dadri, India representing coastal and
industrial region during 2010. The rainwater samples, collected at these locations, were
analyzed for major ions and pH. The data were assessed for its quality. The pH of rainwater
at two locations varied from 5.53 to 6.73 and 5.1–6.6, indicating alkaline nature except a few
acidic events. The dominance of Cl− and Na+ were observed in coastal environment
whereas dominance of Ca2+ was seen in industrial environment. The nss-SO42- (37.9%)
at Rameswaram is less influenced by anthropogenic activities whereas nss-SO42- (72.5%) at
NTPC Dadri is influenced by pollutants emitted by anthropogenic sources. The ratio of H+/
(NO3- + SO42-) was observed as 0.04 and 0.008 for Rameswaram and NTPC Dadri which
is close to zero, indicate 99.99% of acidity was neutralized in precipitation. Ca2+, NH4+ and
Mg2+ play an important role in neutralization of acidic ions in rainwater. For source
identification, correlation matrix analysis was established, which showed that in general,
at both sites; correlation between the acidic ions SO42- and NO3- indicating their origin
from similar sources, because of the similarity in their behavior in precipitation and the coemissions
of their precursors SO2 and NOX. The correlation coefficient of (SO42- + NO3-)
vs (Ca2+) at Rameswaram and NTPC Dadri were 0.77 and 0.87 indicates that CaCO3 is the
major neutralizing agent for both the region. Overall, the influence of marine, terrestrial and
anthropogenic sources was observed in the rain events
 
Publisher Springer
 
Date 2011-09
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/680/1/2011%20rameswaram%20and%20NTPC%20delhi%20rainwater.pdf
Salve, P R and Gobre, T and Lohakare, H and Krupadam, R J and Bansiwal, A. and Ramteke , D S and Wate, S R (2011) Source identification and variation in the chemical composition of rainwater at coastal and industrial areas of India. Journal of Atmospheric chemistry, 68 (3). pp. 183-198. ISSN 0167-7764 (Print) 1573-0662 (Online)
 
Relation http://link.springer.com/journal/10874
http://neeri.csircentral.net/680/