The Uptake of Copper(II) Ions by Chelating Schiff Base Derived from 4-Aminoantipyrine and 2-Methoxybenzaldehyde

Chuan-Wei Oo, Hasnah Osman, Sharon Fatinathan, Maizatul Akmar Md. Zin

School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia.

DOI: 10.4236/ijnm.2013.21001                

Abstract

The Schiff base, 4-[(2-methoxybenzylidene)amino]-1,5-dimethyl-2-phenyl-1H-pyrizol-3(2H)-one (SB), was used for the first time to adsorb copper(II) ions in aqueous solution. Various parameters such as initial pH, agitation period and different initial concentration of copper(II) ions which influenced the adsorption capacity were investigated. The equilibrium adsorption data for copper(II) ions were fitted to Langmuir, Freundlich and Dubinin-Radushkevish isotherm models. The maximum monolayer adsorption capacity of SB as obtained from Langmuir isotherm was 5.64 mg/g. Kinetic data correlated well with the pseudo second-order kinetic model indicating that chemical adsorption was the rate limiting step.

Keywords

Schiff Base; Adsorption; Copper(II) Ions; Isotherm; Kinetics

Conflicts of Interest

The authors declare no conflicts of interest.

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