Please use this identifier to cite or link to this item:
|Title:||Equilibrium, kinetic and thermodynamic studies on biosorption of copper and zinc from mixed solution by <i>Erythrina variegata orientalis</i> leaf powder|
|Authors:||Bai, M Tukaram|
|Keywords:||<i>Erythrina variegata orientalis</i>|
|Abstract:||Present investigation is undertaken to explore the feasibility of biosorption for the removal of copper and zinc from aqueous Cu-Zn solution using <i>Erythrina variegata orientalis</i> leaf powder. Batch investigations indicate that biosorption of Cu-Zn mixture is gradually increased with increase in pH from 1 to 6 (38.25 to 44.77 mg/g). The biosorption of Cu-Zn mixture is increased from 86.3 to 91.9% (86.27 to 45.93 mg/g) with increase in biosorbent dosage from 1 to 2 g/L. 91.9% (45.93 mg/g) of Cu-Zn mixture is removed from the solution containing 100 mg/L of Cu and Zn agitated with 2 g/L of 45 mm size adsorbent for an equilibrium agitation time of 30 min. The experimental data are well described by Langmuir (R<sup>2</sup>=0.99), Freundlich (R<sup>2</sup>=0.98) and Temkin (R<sup>2</sup>=0.98) isotherms. The sorption studies follow the second order rate expression (R<sup>2</sup> = 0.99) and rate constant is 9.39 g/mg-min. The biosorption is found to increase with decrease in temperature of the solution. From the thermodynamic parameters, sorption is found to be exothermic and reversible.|
|ISSN:||0975-0991 (Online); 0971-457X (Print)|
|Appears in Collections:||IJCT Vol.17(5) [September 2010]|
Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.