Diffusion mechanism and the kinetics of biosorption of textile dye by h3po4 and zncl2 impregnated poultry waste sorbent

Abstract

Chemical modification of adsorbent efficacy was performed on poultry waste impregnated with  H3PO4 and ZnCl2. The thermo-chemical activation process was carried out at different dwell time. Two simplified kinetic models, including the intra particle diffusion model were selected to follow the adsorption process. Sorption of industrial dye effluent on poultry wastes could best be described by the second order kinetics (with R2>0.985 and 0.999, a close agreement between the qe experimented and qe calculated with justifiable SSE (%) range of 1.33 to 5.60). Diffusion process does not follow the intra particle diffusion process (C > 0), implying that more than one process affected the adsorption.

Keywords: Poultry wastes, kinetics, intra particle diffusion, textile, dye adsorption