RESUMO
The freshwater fingerlings of Cirrhinus mrigala were exposed to Nickel in acidic medium pH = 6.0 (5.8-6.2), alkaline medium pH = 9.0 (8.8-9.2) and water hardness (40 mg/l) of CaCO3. The study indicates that nickel accumulation was significantly influenced by pH and hardness of water The concentration was found to be significantly higher at pH = 9.0 than at pH = 6.0. Also the presence of hardness in water results in reduced toxicity of nickel.
Assuntos
Animais , Carbonato de Cálcio/farmacologia , Cyprinidae/metabolismo , Brânquias/metabolismo , Concentração de Íons de Hidrogênio , Rim/metabolismo , Fígado/metabolismo , Músculos/metabolismo , Níquel/farmacocinética , Água/química , Poluentes Químicos da Água/farmacocinéticaRESUMO
Studies on plankton of river Cauvery water, Mettur, Salem District, Tamil Nadu was made to assess the pollution of water from January 2003 to December 2003. The qualitative and quantitative evaluation of the variation in river water showed high quantity of phytoplankton and zooplankton population throughout the study period and rotifers formed dominated group over other groups of organisms. The present study revealed that the water of river Cauvery is highly polluted by direct contamination of sewage and other industrial effluents.