In order to achieve the goal of green and efficient energy utilization,how to deal with uranium-contain-ing waste generated during the development of nuclear energy has become an increasingly prominent environ-mental problem.The CaTiO3 materials were initially prepared using the solvent-thermal method.Subsequently,the carbon material was synthesized by grinding a mixture of CaTiO3 and pomegranate peel carbon material,resulting in the formation of carbon-loaded CaTiO3(C@CaTiO3).Modern characterization techniques were employed to analyze the morphological and compositional changes of C@CaTiO3 before and after its reaction with U(Ⅵ).The performance of the material in removing uranium from the solution was evaluated using a static experimental method.The research findings revealed that,under the conditions of pH=3.5,an initial concentration of U(Ⅵ)of 25 mg·L-1,reaction time of 40 min,and temperature of 25℃,the material exhibited a U(Ⅵ)removal rate of 96.26％with a corresponding removal capacity of 119.21 mg·g-1.The reaction mechanism between C@CaTiO3 and U(Ⅵ)was investigated using adsorption kinetics models,isothermal adsorption models,and thermodynamic models.The results demonstrate that the adsorption process of U(Ⅵ)by C@CaTiO3 is a spontaneous endothermic reaction.The removal of U(Ⅵ)from the solution using C@CaTiO3 involved both adsorption and reduction,with physical and chemical adsorption coexisting and surface monolayer chemical adsorption being the predominant mechanism.Photocatalytic reduction played a major role in the reduction process.
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