▎ 摘　　要

Magnetic reduced graphene oxide hydrogel as an adsorbent could be easily separated from water or solid suspensions. In this work, reduced graphene oxide/magnetite/ascorbic acid hydrogel (rGO/Fe3O4/AAH) was fabricated through one-step hydrothermal method as the adsorbent for gold-cyanide complex ions (Au(CN)(2)(-)) in aqueous solution. The study was performed through the measurement of adsorption capacity and characterization via XRD, FT-IR, Raman, SEM, TEM and XPS. The results indicated that nano-scale magnetite particles were successfully anchored on rGO sheets and three-dimensional rGO/Fe3O4/AAH was generated during the hydrothermal process. The adsorption results suggested that rGO/Fe3O4/AAH was an effective adsorbent for recovering Au(CN)(2)(-) from aqueous solution with the maximum adsorption capacity of 309 mg/g, while the spent rGO/Fe3O4/AAH could be easily collected using a magnetic separator. The adsorption of Au(CN)(2)(-) on rGO/Fe3O4/AAH was found to be spontaneous, endothermic process. These results could be of great significant guidance for efficiently recovering Au(CN)(2)(-) from ore slurry in the future.