Adsorption of Methylene Blue Dye by Activated Carbon Prepared from Malted Sorghum Mash and Plantain Peels

Abstract

The feasibility of using an activated carbon prepared from teak leaf litter and cocoa pod husks (MPAC) to remove methylene blue (MB) from aqueous solution was investigated. The effects of contact time, MPAC dosage, initial concentration, pH and temperature of MB solution were investigated through adsorption equilibrium, isotherm, kinetic and thermodynamic studies. Optimum adsorption of MB  from solution occurred at pH 8 and low adsorbent dosages. The physical adsorption process was endothermic and best described by  Langmuir isotherm, pseudo-second order kinetic models and liquid film diffusion mechanism. MPAC is a promising adsorbent for  removing MB from aqueous solution.