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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Apr Supplement 2007, 28 (2)                                                                                                             Back


Influence of pH and water hardness upon nickel accumulation in edible fish Cirrhinus mrigala


S. Karthikeyan*1, PL. RM. Palaniappan2 and Selvi Sabhanayakam3

1Department of Physics,St.Joseph’s College of Engineering,Chennai-600 119, India

2Department of Physics, Annamalai University, Annamalainagar-608 002, India

3Department of Zoology, Annamalai University, Annamalainagar-608 002, India

(Received: November 19, 2005 ; Revised received: May 15, 2006 ; Accepted: June 22, 2006)

Abstract: 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.

Key words: Cirrhinus mrigala, Bioaccumulation, Nickel, pH, Hardness


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