▎ 摘　　要

GO/Al2O3 was successfully prepared by using hydrothermal method which was used to study the removing of fluoride from water. The characterization results of X-ray diffraction (XRD), transmission electron microscope (TEM) and Fourier transform infrared (FT-IR) spectra indicated that gamma-Al2O3 had been modified onto GO nanosheets. The BET surface area of GO/Al2O3 is 326.22 m(2) g(-1) and the corresponding pore size center at 3.7 nm. A batch of fluoride adsorption experiments were employed to investigate the effects of various factors such as solution pH values, contact time, fluoride initial concentrations, temperature, adsorbent dose, co-existing anions, and recycling on fluoride removal. The results showed that the adsorption capacity (4.68 mg g(-1)) of GO/Al2O3 is higher than that of gamma-Al2O3 (3.04 mg g(-1)). In addition, the modified adsorbent had a wide range of pH applications. Adsorption kinetics is well represented by the pseudo-second-order model, which indicating the adsorption processes are involved in chemisorption with ion exchange. The influences of co-existing anions on fluoride removal followed the decreasing order of PO43->HCO3->SO42->Cl->NO3-, which was related to the charge and radius of ions. The recycle performance of GO/Al2O3 is not so good owing to the poor strength of GO during the cycle process. Fluoride adsorption onto GO/Al2O3 could be attributed to electrostatic attraction, ligand exchange, ion exchange and hydrogen-bond interaction between fluoride and OH groups.