▎ 摘　　要

NOVELTY - A method for collecting metals using modified graphene includes: (a) preparing a modified graphene: adding graphene and sulfur nitrogen compounds into water to form a mixture, heating to 80-100C, refluxing, stirring, and solidifying Liquid separation, the solid part is stored as modified graphene, the surface of the modified graphene includes amino groups and sulfur; (b) filter adsorption layer: filter adsorption layer includes modified graphene; (c) input wastewater: wastewater is filtered and adsorbed (D) filtration adsorption: the sulfur of the modified graphene of the filtration absorption layer adsorbs metals in the wastewater, and the liquid molecules and impurities in the wastewater are discharged from the filtration absorption layer through the pores of the modified graphene; and (e) separation of metals : Heating the filter adsorption layer with metal adsorbed to 350-550C to make the modified graphene in the filter adsorption layer boil and volatilize, leaving the metal; wherein, in step (a), the weight ratio of graphene to sulfur nitrogen compound is 1:2 to 1:150. The present invention further includes a device for collecting metals by using modified graphene; by using the method and the device, metals in wastewater can be effectively absorbed and recovered.