For this study, ion-eroded cement was prepared from the cement required for construction of middle- and low-level radioactive waste repositories in caves. The properties for adsorption of ¹³⁷Cs on cement before and after ion erosion were investigated. XRF, XRD, SEM–EDS and BET were used to analyse various cement materials. The effects of reaction time, solid–liquid ratio, initial radioactivity and different ions on adsorption were studied by static batch experiments. When the initial radioactivity was 1114.5 Bq L⁻¹ and the solid–liquid ratio was 5 g L⁻¹, the adsorption equilibrium time was 12 h. Adsorption of ¹³⁷Cs on ion-eroded cement was more effective than that on untreated cement. The adsorption process was consistent with the pseudosecond-order kinetic model and the Freundlich isotherm model, and the process involved multilayer chemisorption. This study provides basic research data for construction of a disposal repository.

在这项研究中，离子侵蚀水泥是由在洞穴中建造中低放废物处置库所需的水泥制备的。考察了离子侵蚀前后水泥对¹³⁷ Cs的吸附性能。XRF、XRD、SEM-EDS 和 BET 用于分析各种水泥材料。通过静态分批实验研究了反应时间、固液比、初始放射性和不同离子对吸附的影响。当初始放射性为1114.5 Bq L ^-1，固液比为5 g L ^-1时，吸附平衡时间为12 h。吸附¹³⁷离子侵蚀水泥上的 Cs 比未经处理的水泥更有效。吸附过程符合准二级动力学模型和Freundlich等温线模型，过程涉及多层化学吸附。本研究为处置库建设提供了基础研究数据。