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  Global Journal of Environmental Science and Technology 2011, 1: 4
  Research Article
Bioconcentration of lead and the influence of antidotes on the selected organs of Catla Catla fingerlings
  M. Vadivelu, PL. RM. Palaniappan  
Department of Physics, Annamalai University, Annamalai Nagar – 608 002, Tamilnadu, India
  In the present work, an attempt has been made to assess the bioconcentration and distribution of lead and the influence of antidotes on the selected organs of freshwater fingerlings Catla catla by using ICP-OES. The work is carried out for sub-chronic (15, 30, 45 and 60 days) exposures of lead followed by exposure of antidotes for 15 days. Lead accumulation was the highest in the kidney tissues and the lowest in muscle tissues. The accumulation pattern of lead in the selected organs of C. catla is: Kidney > Liver > Gill > Brain > Muscle. Also, it has been found that the treatment of antidotes showed significant reduction of lead levels in the tissues of C. catla fingerlings. The result further shows that of all the three antidotes administered to C. catla fingerlings, only Meso-2, 3-dimercaptosuccinic acid (DMSA) showed the best results of recovery and helps the organs resume to normal level. In conclusion, the study clearly demonstrated that C. catla are excellent species for evaluating lead contamination of freshwater bodies.
  Lead; Sub-chronic exposures; Catla catla; Chelating agents  

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