▎ 摘　　要

NOVELTY - Highly efficient uranium adsorbent for bentonite graded graphene oxide preparation involves dispersing graphene oxide in deionized water to obtain an oxidized graphene suspension having a concentration of 2-4 g/l, and then adding bentonite into deionized water with stirring to obtain a bentonite suspension with a concentration of 140-160 g/l. The obtained oxidized graphene suspension and the bentonite suspension are mixed with sodium hydroxide solution with stirring, where epichlorohydrin is also added dropwise at 65-75 degrees C. USE - Method for preparing highly efficient uranium for adsorbing bentonite graded graphene oxide (claimed). ADVANTAGE - The method prepares the highly efficient uranium adsorbent in a simple manner with high adsorption capacity of uranium. DETAILED DESCRIPTION - Highly efficient uranium adsorbent for bentonite graded graphene oxide preparation involves dispersing graphene oxide in deionized water to obtain an oxidized graphene suspension having a concentration of 2-4 g/l, and then adding bentonite into deionized water with stirring to obtain a bentonite suspension with a concentration of 140-160 g/l. The obtained oxidized graphene suspension and the bentonite suspension are mixed with sodium hydroxide solution with stirring, where epichlorohydrin is also added dropwise at 65-75 degrees C. 1% ammonium persulfate solution and 1% aqueous sodium bisulfite solution are also added in the resulting reaction system with stirring for 3-4 hours, where the reaction system is filtered and washed with acetone and distilled water and then cooled at room temperature to obtain powder mixture. The oxidized graphene and bentonite are provided in a weight ratio of 1:25-35. The sodium hydroxide solution, epichlorohydrin, bentonite suspension, 1% ammonium persulfate solution and 1% aqueous sodium bisulfite solution are provided in a volume ratio of 17-22:17-22:90-115:17-22:4-6. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation depicting effect of high-efficiency uranium adsorbents on uranium adsorption as a function of time.