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Comparative Analysis of Cost Effective Biosorbents in the Removal of Chromium and Iron from Aqueous Solution

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Author(s): Thomas Binitha Mancy | Meby Mary Mathew | Shaleesha A Stanley

Journal: Advanced Biotech
ISSN 0973-0109

Volume: 12;
Issue: 12;
Start page: 01;
Date: 2013;
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Keywords: Chromium (VI) | Iron (III) | Moringa oleifera | Azadirachta indica | Tamarindus indica | Strychnos potatorum

ABSTRACT
Sustainability of good health depends upon the purity of water. The presence of toxic heavy metals in drinking water, arising from the discharge of untreated effluents causes various health hazards. While there are proven treatment technologies, adsorption is one of the effective techniques for the removal of heavy metals from drinking water. The present study has compared the removal efficiency of Chromium (VI) and Iron (III) from samples using biosorbents like seeds of Moringa oleifera (drumstick), Azadirachta indica (neem), Tamarindus indica (tamarind) and Strychnos potatorum(nirmali). The equilibrium studies are systematically carried out in a batch process, covering various process parameters that include pH, temperature and contact time. A maximum removal of 94.6 % of Cr (VI) is observed in Tamarindus indica seeds and of Fe (III), maximum of 72.6 % is removed by Moringa oleifera seeds. The prominent removal is obtained at pH 4 and temperature of 311 K. Desorption studies showed prominent datas for the regeneration of the biosorbents. This would serve as a better alternative to conventional chemical water treatment methods in rural areas
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