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

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.

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Abstract

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.

Item Type:Article
Uncontrolled Keywords:Mercury; effluent discharge; acidity
Subjects:Marine Environment > Marine Pollution
Divisions:CMFRI-Cochin > Fishery Environment
ID Code:8707
Deposited By:Arun Surendran
Deposited On:30 Aug 2011 16:54
Last Modified:30 Aug 2011 16:54

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