A simple and efficient method for the adsorption and immobilization of the radioactive ionic-corrosion-products Co²⁺, Cr³⁺, Mn²⁺, Fe²⁺, Ni²⁺, Cu²⁺ and Zn²⁺ generated in nuclear reactor coolant has been developed using a magnetic hydroxyapatite nanocomposite (MA-HAP) and a cold-sintering technique. The structure, morphology, magnetic properties and zeta potential of synthesized MA-HAP adsorbent were studied to evaluate its suitability for cationic uptake. The incorporated magnetic nanoparticles significantly improved the Co²⁺ adsorption capacity of MA-HAP to 68.95 mg/g under optimized conditions such as a pH of 6, a contact time of 120 min and an adsorbent dosage of 4 g/L. More than 92% of Co²⁺ was removed from the simulated aqueous solution in the presence of other ionic-corrosion-products. Densification of the nanocomposite loaded with the corrosion product was carried out using a pressure-assisted cold-sintering technique at 200 °C for 10 min. The sintered waste form showed high relative density (>95%) and hardness (>2.5 GPa). The results of a product consistency test indicated a low normalized leaching rate in the range 10⁻⁶ to 10⁻⁷ g/m²/day for all ions adsorbed by the MA-HAP. Thus, the material and methods introduced here are highly capable of adsorbing and immobilizing radioactive waste.

一种简单有效的吸附和固定核反应堆冷却剂中产生的放射性离子腐蚀产物Co 2 ⁺，Cr ³⁺，Mn 2 ⁺，Fe 2 ⁺，Ni 2 ⁺，Cu ²⁺和Zn ^2+的方法已使用磁性羟基磷灰石纳米复合材料（MA-HAP）和冷烧结技术开发了这种材料。研究了合成的MA-HAP吸附剂的结构，形态，磁性能和ζ电位，以评估其对阳离子吸收的适用性。掺入的磁性纳米粒子显着改善了Co ²⁺在优化的条件下（例如pH值为6，接触时间为120分钟和吸附剂剂量为4 g / L），MA-HAP的吸附容量达到68.95 mg / g。在存在其他离子腐蚀产物的情况下，从模拟水溶液中去除了超过92％的Co ²⁺。负载有腐蚀产物的纳米复合材料的致密化过程是使用压力辅助冷烧结技术在200°C下进行10分钟。烧结废料形式具有较高的相对密度（> 95％）和硬度（> 2.5 GPa）。产品一致性测试的结果表明归一化浸出率较低，范围为10 ^-6至10 ^-7  g / m ²/天，用于MA-HAP吸附的所有离子。因此，这里介绍的材料和方法具有很高的吸附和固定放射性废物的能力。