中文摘要：

针对污染水体中的放射性元素去除问题，本工作研究了 Th（Ⅳ）在氧化石墨烯上的吸附动力学和热力学。结果表明：Th（Ⅳ）在氧化石墨烯上的吸附动力学服从准二级动力学方程；吸附等温线可以用 Langmuir和Freundlich方程描述；吸附是吸热自发过程。氧化石墨烯对Th（Ⅳ）具有很强的吸附能力，是一种用于放射性元素富集固化的具有潜在应用价值的材料。

英文摘要：

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 appli-cation in the enrichment and immobilization of radionuclides.