▎ 摘　　要

Owing to the development and utilization of nuclear energy, an excessive amount of containing uranium wastewater is generated and poses an environmental hazard. In this study, a novel polyoxometalate modified ammoniated graphene oxide (PHGO) was synthesized for the management of radioactive wastewater. The developed adsorbent was investigated by SEM/EDX, AFM, FT-IR, XRD, Raman, TAG and XPS techniques. The effects of pH, reaction time, initial U(VI) concentration, temperature, regeneration time, and co-existing ions on the removal of U(VI) by PHGO were explored. Results show that the maximum adsorption capacity of PHGO for U(VI) was 576 mg/g at pH 5.0, 298 K and 6 h under experimental conditions. In addition, PHGO displayed good stability and adsorption quantity only decreased from 199 mg/g to 150 mg/g after eight cycles. PHGO shows a high efficiency U(VI) removal of 95.4 % (C[U(VI)] = 100 mu g /L) for wastewater with variety of metal ions and the residual U(VI) concentration (4.6 mu g/L) in wastewater was lower than the most permissible concentration of uranium in drinking water (30 mu g/L, World Health Organization). Overall, the PHGO was an excellent adsorbent for extracting uranium.