Adsorption Kinetics and Thermodynamics of Radionuclide Th(Ⅳ) on Graphene Oxide

In order to effectively remove radionuclides from the contaminated sites, the adsorption kinetics and thermodynamics of Th（Ⅳ） on graphene oxide (GO) were studied in this paper. The results indicate that the kinetic adsorption of Th（Ⅳ） on GO can be fitted well by the pseudo-second-order kinetic model. Besides, the adsorption isotherm of Th（Ⅳ） on GO can be described by both Langmuir and Freundlich model. From the thermodynamics analysis, we can see that the adsorption of Th（Ⅳ） on GO is an endothermic and spontaneous process. GO has an extraordinary adsorption capacity for Th（Ⅳ）, and shows potential application in the enrichment and immobilization of radionuclides.