The specific surface area of raw, defatted and sulfuric acid pretreated DAB was estimated to be 14.70, 18.94, and 19.10 m2g ,respectively. To evaluate the kinetic mechanism that controls the adsorption process, pseudo-first order,
pseudo-second order, intraparticle diffusion and particle diffusion has been tested. The data fitted quite
well with pseudo-second order kinetic model.