Removal of Methylene Blue Dye from Aqueous Solution Using Activated Carbon Prepared from Pandanus Tectorius Leaves

The adsorption of methylene blue (MB) dye onto screw pine (Pandanus tectorius) leave -based activated carbon (SPAC) was carried out in this work. The effects of initial MB concentration, contact time, initial pH and solution temperature on MB adsorption were investigated. MB adsorption uptake was found to increase with increase in initial concentration, contact time and solution temperature. The adsorption equilibrium data were best represented by the Freundlich model. Adsorption kinetic was found to follow the pseudo-second-order kinetic model. The mechanism of the adsorption process was determined from the intraparticle diffusion model. Boyd plot indicated that the MB adsorption on the SPAC was controlled by film diffusion. Thermodynamic parameters ∆G◦, ∆H◦, ∆S◦ and Ea were also determined.