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Environment degradation by chemical effluents along the Kayalpatinam coast of Gulf of Mannar with special reference to mercury

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Relation http://eprints.cmfri.org.in/8707/
 
Title Environment degradation by chemical effluents along the Kayalpatinam coast
of Gulf of Mannar with special reference to mercury
 
Creator Asha, P S
Selvaraj, M
Diwakar, K
 
Subject Marine Pollution
 
Description Studies were carried out on the level of mercury and other water quality parameters in the effluent
lagoon of Dharangadhara Chemical Works, Tuticorin and the adjacent open sea over a period of three
years and the impact of effluent discharge in bulk quantity into the coastal marine environment, over
a distance of 18 km. The present study indicated that the presence of mercury, acidity and low oxygen
concentration are the major impacts of effluent discharge. The mean concentration of mercury in the
open sea during 1999 – 2002, was 4.7 μg. l-1 which got reduced to 1.68 μg. l-1 after five years, indicating
the improvement of effluent treatment measures. However the mercury levels are still higher compared
to those reported elsewhere. Except for salinity and pH, no statistically significant difference was observed
in the variation of other parameters between stations during 1999-2002, but highly significant differences
were observed in the variation of dissolved oxygen, chlorophyll, pH and salinity between stations during
2007-2008.
 
Publisher Marine Biological Association of India
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/8707/1/75--80--P._S._Asha.pdf
Asha, P S and Selvaraj, M and Diwakar, K (2011) Environment degradation by chemical effluents along the Kayalpatinam coast of Gulf of Mannar with special reference to mercury. Journal of the Marine Biological Association of India, 53 (1). pp. 75-81.