Adsorption of Copper Ions from Aqueous Systems Using Moss Peat: Reaction Kinetics and Adsorption Isotherm

Abstract

The removal of copper ions from aqueous systems using moss peat was investigated. Kinetic experiments were conducted at a constant temperature, pH, and initial copper concentration. The data obtained from the kinetic experiments were analysed and fitted well using the pseudo-second-order model. The data of the isotherm experiment were modelled and fitted well with the Langmuir models. This finding suggests that copper ions are chemically adsorbed on the moss peat and assume monolayer adsorption. The optimum pH for copper ion adsorption by moss peat was investigated over a range of (2-4.5), and it was found that the maximum adsorption capacity of moss peat was achieved at pH 4.5. The results of this study suggest the potential use of moss peat as an effective material for the adsorption of copper ions from aqueous solutions under a range of environmental conditions.