Effect of gamma irradiation dose on the adsorption kinetics of Rovamycin by a composite material

The present study focuses on the effect of the gamma irradiation dose on the adsorption kinetics of Rovamycin by composite materials. The retention of this antibiotic is closely related to this parameter. The equilibrium plateau begins to appear around 270 min. The equilibrium time with the macrolitic solution for all adsorbent beads is 360 min to ensure reaching equilibrium, and the maximum adsorption capacity is 19 mg/g. In addition, the adsorption obeys the pseudo-first-order kinetics for the bioadsorbent prepared based on orange peel powder (OPP) irradiated at 4 kGy and the intra-particle diffusion model for those prepared based on OPP irradiated at 1, 2, and 3 kGy.