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Biosorption of Chromium (VI) from Industrial Effluent using Neem Leaf Adsorbent

Author Affiliations

  • 1Department of Chemical Engineering, Coimbatore Institute of Technology, Coimbatore –14, Tamil Nadu, INDIA

Res.J.chem.sci., Volume 3, Issue (4), Pages 48-53, April,18 (2013)


Industrial water pollution is a potential threat to human health mainly because of the non-biodegradable, hazardous heavy metals. Among these heavy metals chromium is of considerable concern. Various methods adopted for removal of heavy metals include chemical precipitation, membrane separation, ion exchange and adsorption. In case of adsorption, the generally used adsorbents like activated carbon, silica, alumina, etc. are expensive. This has prompted the use of natural materials as adsorbents in order to develop cheaper alternatives, which can be disposed off without regeneration due to their lower cost. Azadirachta indica leaf powder is tried for the removal of chromium. The newly developed adsorbents should be as effective as the conventional ones. Hence in the present work, Azadirachta indica (Neem) leaf powder is studied for their adsorptive capacity to remove chromium (VI) from aqueous solution. The equilibrium studies are systematically carried out in a batch process covering various process parameters that include agitation time, adsorbent dosage, temperature and initial concentration of chromium. The adsorption behavior is finding to follow the Freundlich Adsorption Isotherm.


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