Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2011 Vol: 3 Issue: 6

Equilibrium and kinetic studies for biosorption system of chromium ions from aqueous solution using Ficus benghalensis L. powder


In the present investigation, the biosorption is carried out to test the suitability of abundantly available plant based material Ficus Benghalensis L. Leaf powder as an adsorbent for removal of chromium ions from aqueous solution. The equilibrium studies are systematically carried out in a batch process, covering various process parameters that include contact time, adsorbent size and dosage, initial chromium ion concentration and pH of the aqueous solution. It is observed that there is a significant increase in percentage removal of chromium ions as pH increases from 2 to 6 and attain maximum when pH is 6. The contact time is to be 10 minutes. The Langmuir isotherm is more suitable for biosorption followed by Temkin and Freundlich isotherms. The biosorption of chromium ions follows second order kinetic model having a correlation coefficient of 0.9987.