Comparative toxicity of an effluent from a chlor-alkali industry and HgCl2
Release of waste waters from industries severely affect aquatic flora and fauna. Effluents from industries involved in the production of pesticides, or from industries utilizing toxic substances in their production processes are of particular concern. One such industry, the chlor-alkali industry, utilizes mercury as a cathode in an electrolytic process. The present study reports the toxicity assessment of the effluent from a chlor-alkali factor, Jayshree Chemicals Ltd., Ganjam, Orissa. The reported production capacity of the plant is 50 tons of NaOH per day. The effluent discharged, 50,000 1 per day, contains mercury ranging up to 1.5 mg/l, much more than the permissible limit of 0.01 mg/l set by the Central Board for the Prevention and Control of Water Pollution, India. The effluent enters the Rushikulya River Estuary and finally the Bay of Bengal. This paper was also designed to determine whether the mercury present in the effluent was toxic or whether the toxicity involved some other parameters of the effluent as well.
Mercury in the Rushikulya river estuary
Analyse mensuelle du mercure contenu dans des echantillons d'eau et de sediment de l'estuaire de la riviere Rushikulya
Mobilization of Mercuric Sulfide from Sediment into Fish under Aerobic Conditions
A system for studying the aerobic mobilization of mercury from aquatic sediments into fish was described. Using this method, it was shown that mercuric sulfide in sediment was very slowly mobilized...