Effective and selective removal of anionic dye-based on wasted magnetic chitosan immobilized cellulase beads

The removal of dyes from wastewater by wastes has already attracted a great deal of attention for being in line with the idea of “treating the wastes with wastes”. In this study, the waste chitosan magnetic beads immobilized cellulase (CMP-IC) was applied in the adsorption of Orange G (OG) anionic dyes, so as to investigate the kinetics, isotherm and thermodynamics of the adsorption process. Providing porous structures and specific surface areas for OG molecules, CMP-IC possessed a higher adsorption rate at pH = 4 and suited with pseudo-second-order kinetic belong to rate-limiting step. Meanwhile, the adsorption was a spontaneous procedure that met the Langmuir isotherm described as monolayer adsorption. CMP-IC was selective in adsorbing OG anionic dye from the mixed dyes solutions and was efficient in reabsorbing OG for 5 cycles due to the excellent chemical and structural stabilities. Our study can provide new insights into utilizing waste materials for water treatment for various promising applications.