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.

KEYWORDS:

• Albizia lebbeck
• breakthrough
• Cd(II)
• exhaustive capacity
• sorption

Acknowledgements

Authors are thankful to the chairman, Department of Applied Chemistry, Aligarh Muslim University, Aligarh, India, for providing necessary research facilities support for this work through Sophisticated Analytical Instrumentation Facility (SAIF) Punjab University, Chandigarh, is also greatly acknowledged.

Funding

Authors are thankful to the UGC-MANF Delhi for providing financial assistance.