锆磷酸盐（ZrP），尤其是其αα异形态结构，由于其极高的离子交换能力和良好的辐射稳定性等性质，似乎是一种非常有潜力的吸附剂材料，可以用于吸附和分离各种放射性核素。钍-225及其子核素镭-213是高度关注的αα放射性同位素，可用于靶向αα疗法治疗癌症。因此，本文的主要目的是研究αα-ZrP表面对225Ac的吸附及其动力学，而利用natEu作为225Ac的非放射性同系物研究吸附动力学。使用批量吸附实验在酸性环境（盐酸和硝酸）中测试了αα-ZrP的吸附性能，并使用平衡质量分配系数Dw（mL/g）进行表征。对实验数据进行建模显示，225Ac在αα-ZrP表面的吸附动力学可以用膜扩散模型（FD）描述。在5.0-7.5 mM（分别为14,303 ± 153和65,272 ± 612 mL/g）浓度范围内，225Ac在盐酸和硝酸中的平衡质量分配系数Dw达到最高值。考虑到从225Ac的放射性固定吸附实验和natEu的非放射性动力学实验中获得的结果，αα-ZrP似乎是进一步构建225Ac/213Bi发生器的非常有前景的材料。

Zirconium phosphate (ZrP), especially its alpha allotropic modification, appears to be a very promising sorbent material for the sorption and separation of various radionuclides due to its properties such as an extremely high ion exchange capacity and good radiation stability. Actinium-225 and its daughter nuclide 213Bi are alpha emitting radioisotopes of high interest for application in targeted alpha therapy of cancer. Thus, the main aim of this paper is to study the sorption of 225Ac on the α-ZrP surface and its kinetics, while the kinetics of the sorption is studied using natEu as a non-radioactive homologue of 225Ac. The sorption properties of α-ZrP were tested in an acidic environment (hydrochloric and nitric acid) using batch sorption experiments and characterized using equilibrium weight distribution coefficients Dw (mL/g). The modeling of the experimental data shows that the kinetics of 225Ac sorption on the surface of α-ZrP can be described using a film diffusion model (FD). The equilibrium weight distribution coefficient Dw for 225Ac in both hydrochloric and nitric acid reached the highest values in the concentration range 5.0-7.5 mM (14,303 ± 153 and 65,272 ± 612 mL/g, respectively). Considering the results obtained in radioactive static sorption experiments with 225Ac and in non-radioactive kinetic experiments with natEu, α-ZrP seems to be a very promising material for further construction of a 225Ac/213Bi generator.