▎ 摘　　要

Adsorbent has been widely used for the recovery and enrichment of rare metals from waste water. Herein, a graphene-based adsorbent, graphene oxide/Fe3O4 (GO/Fe3O4) nanocomposite, was prepared by a facile hydrothermal method, and characterized by X-ray diffraction, Scanning Electron Microscope, X-ray Photoelectron Spectroscopy, Zeta potential and magnetization. The material has been explored for the recovery of In from simulated waste water. The test results show that the nanocomposite has a reasonable adsorption capacity on indium in a wide pH range, e.g., the adsorption percent and quantity of In(III) from the aqueous solutions at pH = 4 and C-0 = 50 mg.L-1 are 91% and 43.98 mg.L-1, respectively. In addition, the nanocomposites maintain a 75.5% cycling capacity and a 71% removal efficiency after five continuous cycles due to their novel properties of high specific surface area and superparamagnetism. The pseudo-second-order adsorption model can be used to interpret the kinetic data. High adsorption efficiency and good reusability can make the nanocomposite a promising adsorbent for recovery of In(III).