ADSORPTION DYNAMICS OF METHYLENE BLUE DYE ONTO SURFACE MODIFIED ACTIVATED CARBON PREPARED FROM PTEROCARPUS MARSUPIUM BARKS

Abstract

Pterocarpus Marsupium barks have been utilised to prepare activated carbon with the aid of orthogonal array experimental techniques with the parameters inclusive of microwave radiation energy, radiation time, concentration of H3PO4 acid and impregnation time. Radiation energy 850W, radiation time 15 min, 50% of H3PO4acid, impregnation time 24 hours were found to be the optimum conditions. Thus prepared carbon was designated as PBC (Pterocarpus Marsupium Bark Carbon). Surface of the PBC was modified with Hydrochloric acid solution and also separately with Potassium hydroxide solution. Influences of initial dye concentration on adsorption kinetics were studied. Kinetic models such as Pseudo first order, Pseudo second order and Intra Particle diffusion had been used to describe the mechanism of this adsorption process.