▎ 摘　　要

Graphene oxide/polyethylene imine (GO/PEI) and graphene oxide/polyethylene imine/carboxymethyl cellulose (GO/PEI/CMC), these two kinds of composite adsorbent materials for heavy metal Cu(2+)were prepared by cross-linking and graft copolymerization, and the GO was obtained by an improved method of Hummers in this work. The adsorption properties of GO, GO/PEI and GO/PEI/CMC on Cu(2+)were compared and analyzed with the initial pH value of solution, adsorption time, initial concentration of Cu(2+)and adsorbent dosage as the indicators. The results showed that the optimal adsorption pH of GO/PEI and GO/PEI/CMC for Cu(2+)were 5.0 similar to 5.5; both GO/PEI and GO/PEI/CMC reached adsorption equilibrium in 195 min; when the adsorption is saturated, compared with the maximum adsorption capacity of GO (112.91 mg.g(-1)), the maximum adsorption capacity of GO/PEI and GO/PEI/CMC for Cu(2+)reaches 294.41 mg g(-1)and 302.04 mg g(-1), respectively. Moreover, GO/PEI/CMC is more convenient for solid-liquid separation after adsorption, which is a kind of adsorption material with more practical application potential.