BIOACCUMULATION OF HEAVY METAL IN THE FISH, LABEO ROHITA EXPOSED TO TEXTILE DYEING EFFLUENT, TAMILNADU, INDIAS. BINU KUMARI M. MANIMEGALAI AND S. UMAVATHIAbstract Toxicity of heavy metal namely copper in different tissues such as brain, gill, liver, kidney, muscle and intestine of Labe() rohito exposed to 2.5% diluted dyeing effluent. LC) values of the effluent at 24, 48, 72 and 96 hours were found to he 3.5%, 3.1%, 2.9% and 2.5% respectively. The tissue distribution of copper in Labeo rohita as a result of bioaccumulation showed variations and a high degree of organ specificity. Accumulation of copper in 96 hours was more pronounced than 72, 48 and 24 hours. Heavy metal predominantly accumulated in different organs of fish and the order of organs in terms of copper concentration was intestine >muscle >brain >gill >kidney > liver in the test species.
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