Equilibrium Modeling and Kinetic Studies on the Adsorption of Basic Dye by A low-Cost Adsorbent: Sugarcane Bagasse

Abstract

This study was carried out to examine the effectiveness of sugarcane bagasse, an agricultural waste available in bulky quantity in Malaysia, to remove basic dye (e.g., methylene blue) from aqueous solution by adsorption. Batch mode experiments were carried out to study the effects of shaking speed, contact time, adsorbent dosage, and pH. Furthermore, equilibrium adsorption isotherms and kinetics were investigated. In the optimum operation condition, about 96.9 and 95.5 removal percentage of colour was obtained at 200 rpm shaking speed, 6 hr contact time and 0.2 g AC dosage. The experimental data were analyzed by the Langmuir, and Freundlich models of adsorption. The adsorption isotherm data were fitted well to Langmuir isotherm. The kinetic data has been analyzed using a pseudo-first-order, pseudo-second-order equation and intraparticle diffusion equation. The experimental data fitted very well the pseudo-second-order kinetic model with R 2 > 0.99. Consequently, the adsorption of MB onto the AC driven from sugarcane bagasse has a great potential to be used textile waste water treatment.