Pore diffusion during the adsorption of dyes onto bagasse pith

The adsorption of four dyestuffs onto bagasse pith, a waste product from the sugar cane industry, has been studied. The equilibrium isotherms have been measured and concentration versus time decay curves have been determined in an agitated batch adsorber. A two-resistance model has been developed based on external film mass transfer and pore diffusion. The model incorporates a concentration-decay curve fitting routine which was optimized during the model development. The experimental batch contact time data have been compared with the theoretically predicted data in the form of Sherwood numbers.