EQUILIBRIUM, KINETIC AND MASS TRANSFER OPTIMIZATION STUDIES OF CATIONIC DYE ADSORPTION ONTO CHEMICALLY MODIFIED BIO-SORBENT DERIVED FROM LIGNOCELLULOSIC WASTE
Journal: Acta Chemica Malaysia (ACMY)
Author: Nworie, F. S, Ike-Amadi, A.C, Agha-Akpu J, Nworu, J
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A one, two and three parametric equilibrium models as well as kinetic and mass transfer models were used to optimize the adsorption of cationic dye (methylene blue) onto a chemically modified biosorbent derived from plantain peels (PP) waste. The chemically modified PP was characterized using Braunauer-Emmett-Teller (BET), X-ray Diffraction (XRD), Fourier Transform Infra-red Spectroscopy (FTIR) and Scanning Electron Microscope (SEM). Parameters influencing adsorption were optimized and result indicated maximum adsorption at contact time of 120 S, pH of 8 and initial methylene blue (MTB) concentration of 7.75 × 10-6 mg/L. The maximum adsorption capacity was evaluated to be 222mmolkg-1. The data simulated into the equilibrium models based on error analysis and coefficient of non-determination indicated that the adsorption process followed mainly the Hill equilibrium isotherm model and perfectly fits the Elovic kinetics and mass transfer process as the rate determining step. The modified PP is recommended for the removal of cationic dyes in effluents and aqueous media.