▎ 摘　　要

NOVELTY - Treating radioactive wastewater by using konjac-glucomannan-reduced graphene oxide (KGM-rGO) sponge involves dispersing graphene oxide in deionized water and sonicating to obtain a graphene oxide solution, and adding konjac glucomannan to the graphene oxide solution, mixing and stirring at room temperature for 12-36 hours, freezing to form a block, and freezing freeze dry in vacuum. The dried solid sample is added to the reaction kettle, added potassium hydroxide (KOH) solution and absolute ethanol at the same time, placed the reaction kettle in an oven and keep at 75-85 degrees C for 6-10 hours, taken out and vacuum freeze-dried to obtain konjac glucomannan-reduction graphene oxide sponge. A containing groove is opened on the upper surface of the polystyrene foam, embed the konjac glucomannan-graphene oxide sponge in the containing groove of the polystyrene foam. USE - Method for treating radioactive wastewater by using KGM-rGO sponge. ADVANTAGE - The method enables to treat radioactive wastewater by using KGM-rGO sponge, that can efficiently treat solar-driven radioactive wastewater, and KGM-rGO sponge has good water absorption, light and heat, and heat preservation and fast transportation improve the efficiency of water evaporation, and the concentration of radioactive elements in radioactive wastewater is significantly reduced after evaporation. DETAILED DESCRIPTION - Treating radioactive wastewater by using konjac-glucomannan-reduced graphene oxide (KGM-rGO) sponge involves dispersing graphene oxide in deionized water and sonicating to obtain a graphene oxide solution, and adding konjac glucomannan to the graphene oxide solution, mixing and stirring at room temperature for 12-36 hours, freezing to form a block, and freezing freeze dry in vacuum. The dried solid sample is added to the reaction kettle, added potassium hydroxide (KOH) solution and absolute ethanol at the same time, placed the reaction kettle in an oven and keep at 75-85 degrees C for 6-10 hours, taken out and vacuum freeze-dried to obtain konjac glucomannan-reduction graphene oxide sponge. A containing groove is opened on the upper surface of the polystyrene foam, embed the konjac glucomannan-graphene oxide sponge in the containing groove of the polystyrene foam. The radioactive wastewater is added to a transparent container, and then added polystyrene foam embedded with konjac glucomannan-graphene oxide sponge to the radioactive wastewater, and immersed half of the konjac glucomannan-graphene oxide sponge in the radioactive wastewater, and the other half outside the radioactive wastewater. The xenon lamp is used to illuminate the konjac glucomannan-graphene oxide sponge that is exposed to the radioactive waste water to realize the evaporation treatment of the radioactive waste water. The radioactive ions in the radioactive wastewater are adsorbed by the konjac glucomannan-graphene oxide sponge.