Adsorption of Methyl Green dye onto MCM-41: equilibrium, kinetics and thermodynamic studies
Saja Mohsen Alardhi, Jamal M. Ali, Talib M. Albayati
Abstract
ABSTRACT The nanoporous material, Mobil Composition of Matter No. 41 (MCM-41), was prepared and characterized in order to adsorb methyl green (MG) dye from artificial wastewater by adsorption method. The MCM-41 was characterized through X-ray diffraction spectroscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and Brunauer–Emmett–Teller. The preliminary results were examined for adsorbent mesoporous material samples, in order to estimate the best states for the adsorption of the model dye: adsorbent dose (0.00–80.04 g) contact time (8–150 min), temperature (25°C–45°C), and initial concentration of dye (10–50 mg/L) where the removal efficiency of MG dye under optimum conditions was around 99%. The outcomes were elucidating that the adsorption isotherms can be quite befitting by the Temkin model, with a coefficient of determination 0.9669. The adsorption kinetics of MG onto adsorbate was strongly represented by a pseudo-second- order kinetic model.