Equilibrium and kinetic study of removal copper(II) from aqueous solution using chicken eggshells: Low-cost sorbent

Abstract

The research aims to investigate feasibility eggshells as potential adsorbent for copper (II) ion removal from an aqueous solution. The eggshells powder was characterized using X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. The effect of copper (II) initial concentration, adsorbent dosage, and contact were have conducted to determine the optimum adsorption process. The maximum percentage of copper(II) removal was exceeded more than 85%. The Langmuir, Freundlich, and Dubinin-Radushkevich isotherm model were applied to describe its equilibrium adsorption. The copper (II) kinetics sorption process was fitted to pseudo-second order model with a rate constant equal to 0.516 g/mg.min. The results clearly exhibit that eggshells powder can be effectively used to remove copper(II) ions from aqueous solutions.