▎ 摘　　要

NOVELTY - Chitosan solution with concentration of 1-5 %mass, 1 g fly ash and 1 mL chitosan solution are thoroughly mixed for 2-3 hours. The mixture is filtered and dried at 50-80 degrees C for 2-3 hours. Graphene oxide solution is dripped to 1 g fly ash and stirred. The obtained mixture is diluted with water, to form solution with solid concentration of 40 g/L. 1 g Fly ash is added to 0.5-2 mL glutaraldehyde, stirred, crosslinked at 50-80 degrees C for 2-3 hours, filtered, washed with absolute ethanol until neutral and vacuum-dried, to obtain graphene oxide composite adsorbent. USE - Preparation of graphene oxide composite adsorbent used for adsorbing cation dye and contaminants. ADVANTAGE - The method enables preparation of graphene oxide composite adsorbent having excellent graphene oxide easy-separation characteristics. DETAILED DESCRIPTION - Chitosan solution with concentration of 1-5 %mass, 1 g fly ash and 1 mL chitosan solution are thoroughly mixed for 2-3 hours. The mixture is filtered and dried at 50-80 degrees C for 2-3 hours. Graphene oxide is ultrasonically-dispersed in water, to form graphene oxide solution with concentration of 2-5 g/L. 10-20 mL Graphene oxide solution is dripped to 1 g fly ash for 8-12 hours and stirred for 2-3 hours. The obtained mixture is diluted with water, to form solution with solid concentration of 40 g/L. 1 g Fly ash is added to 0.5-2 mL glutaraldehyde, stirred, crosslinked at 50-80 degrees C for 2-3 hours, filtered, washed with absolute ethanol until neutral and vacuum-dried at 60 degrees C for 5-6 hours, to obtain graphene oxide composite adsorbent.