Amna Khatoon

Sorption studies for Cd(II) sequestration from aqueous solution on chemically modified Albizia lebbeck

ABSTRACT In the present work, a new sorbent was successfully prepared by chemically modifying pods of Albizia lebbeck (AL) by Fenton’s reagent, followed by sodium silicate. Sorption studies were carried out by batch process. The optimum pH was found to be 6. Equilibrium isotherm data were analysed by non-linear curve fitting analysis, to fit Langmuir, Freundlich and Temkin isotherm models. Based on the Langmuir isotherm model, maximum monolayer sorption capacity (qm) was found to be 21.22 mg.g−1 at 50°C. Breakthrough and exhaustive capacities were found to be 10 and 50 mg.g−1, respectively. Desorption study showed 95% recovery of Cd(II) ions.