Publications (3)3.4 Total impact
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Article: Decontamination of nitrogenous toxicants from brackish water using plant and animal extracts.
Bulletin of Environmental Contamination and Toxicology 08/2003; 71(1):196-203. · 1.02 Impact Factor -
Article: Acute toxicity of some heavy metals to Lates calcarifer fry with a note on its histopathological manifestations.
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ABSTRACT: Static bioassay tests for acute toxicity of four heavy metals to fry of the fish Lates calcarifer in brackishwater medium were conducted. The 96 h LC50 values of metals such as Hg, Cu, Cr, and Mn for two different size groups 11 +/- 3 mm and 24 +/- 4 mm were found to be 0.085, 1.3, 27.9, and 220 mg/L and 0.20, 1.8, 33, and 250 mg/L, respectively. The rank order of toxicity of metals was found to be Hg > Cu > Cr > Mn. Using the safe concentration factor of 0.01, the allowable safe concentration for Hg, Cu, Cr, and Mn in brackishwater are 0.00085-0.002, 0.013-0.018, 0.279-0.33, and 2.20-2.50 mg/L, respectively. The damage caused to different organ systems of the fish, exposed to the heavy metals, agrees with the rank order of the toxicity. Heavy nerve tissue necrosis was observed in fish exposed to mercury. Copper induced gill epithelial necrosis and kidney tubular degeneration. Chromium and manganese accounted for various histopathological manifestations involving vital organs such as liver and kidney.Journal of Environmental Science and Health Part A 04/2003; 38(4):645-55. · 1.19 Impact Factor -
Article: Studies on the use of neem products for removal of ammonia from brackishwater.
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ABSTRACT: Laboratory experiments were carried out to investigate the ammonia removal from brackishwater (Salinity 16 +/- 1 ppt) using natural plant products such as seed powder and seed oil from neem (Azadirachta indica) and commercially available neem products-neemazal and neemgold. The experimental results showed that ammonia removal was effective with 90 mg/l of neem oil, whereas, neem seed powder at 90 mg/l registered an increase in ammonia levels throughout the course of the experiment. Neem oil, neemazal, and neemgold at 90 mg/l were effective in decreasing the total ammonia nitrogen (TAN) level of 0.40-0.45 mg/l in 96 h. The effect of initial ammonia concentrations on the ammonia removal using neem oil revealed that percentage ammonia removal decreased with an increase in initial ammonia concentration.Journal of Environmental Science and Health Part A 02/2002; 37(5):893-904. · 1.19 Impact Factor
