▎ 摘　　要

In this study, chitosan-metal oxide composites (CS-MO) were prepared for graphene oxide (GO) removal from aqueous solutions. The results showed that the GO coagulation on CS-MO was dependent on pH and ionic strength. The maximum GO removal capacities reached 442.5 mg/g on CS-Al2O3, 425.0 mg/g on CS-ZnO and 421.2 mg/g on CS-MgO, respectively, showing a huge advantage in the efficient elimination of GO from natural water system. The coagulation of GO on CS-MO was dominated by electrostatic attraction in acidic conditions and by hydrogen bonds in neutral and alkaline conditions. The findings are helpful to improve the current understanding of the environmental behavior of GO in natural aqueous systems.