▎ 摘　　要

NOVELTY - A three-dimensional graphene comprises self-assembled three-dimensional graphene, ethylenediamine-modified self-assembled three-dimensional graphene, ascorbic acid-modified self-assembled three-dimensional graphene and dopamine-modified self-assembled three-dimensional graphene. USE - Three-dimensional graphene is used for absorbing heavy metal pollutant during groundwater treatment. ADVANTAGE - The three-dimensional graphene has large absorption capacity with respect to heavy metal pollutants and long service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of three-dimensional graphenein heavy metal contaminated groundwater. The groundwater flow rate is controlled at 5 m/d in continuous flow simulation groundwater treatment plant. The divalent lead ion concentration and divalent copper ion concentration are controlled at 50 mg/L and 40 mg/L, respectively. The self-assembled three-dimensional graphene has divalent lead ion adsorption rate of 94.3%, and divalent copper ion adsorption rate of 90.9%. The ethylenediamine-modified three-dimensional graphene oxide has lead ion adsorption rate of 97.3% and divalent copper ion adsorption rate of 93.6%. The ascorbic acid modified three-dimensional graphene oxide has divalent lead ion adsorption rate of 89.3% and divalent copper ion adsorption rate of 88.3%. The dopamine-modified three-dimensional graphene oxide has divalent lead ion adsorption rate of 97.5% and divalent copper ion adsorption rate of 96.4%.