A situ co-precipitation method to prepare magnetic PMDA modified sugarcane bagasse and its application for competitive adsorption of methylene blue and basic magenta

► Magnetic modified sugarcane bagasse was prepared by a situ co-precipitation method. ► Magnetic modified sugarcane bagasse could be recycled by an applied magnetic field. ► Competitive adsorption between methylene blue and basic magenta was studied. ► Capacity of the sorbent had linear correlation with concentration percentage of dye.