Three-dimensional graphene oxide/phytic acid composite for uranium(VI) sorption

In this work, a novel three dimensional graphene oxide sponge composite material was synthesized by functionalized GO sheets with phytic acid (PA). The as-synthesized samples were characterized and employed to investigate the removal of U(VI) from aqueous solution. Results show that higher pH favored the sorption of uranium on PA-GO. Ionic strength puts insignificant influence on the sorption. The maximum adsorption capacity is 124.3 mg g(-1) at pH 5.5. The adsorption isotherms can be well described by Langmuir isotherm model and the sorption kinetics has been successfully modeled by pseudo-second-order kinetic model.