As the risk of radioactive waste generated in large quantities is emerging, rapid and selective cesium ion decontamination has become a significant issue for waste volume reduction. This study demonstrates a novel immobilization strategy to synthesize a composite adsorbent embedding potassium copper hexacyanoferrate (KCuHCF) for effective cesium ion separation. Through an electrospinning technique, a nanofiber matrix was fabricated from a polymer blended with poly-vinyl alcohol and sodium alginate, and in situ immobilization of KCuHCF was achieved via the coordination effect of carboxylate functionality. The immobilized KCuHCF nanoadsorbent content and uniformity were optimized by controlling the ratio of the polymers, which was systematically analyzed through electron microscopy and spectroscopic analyses. The composite adsorbent in the batch experiment exhibited a high adsorption capacity of 114 mg g⁻¹ and selectivity for cesium showing distribution coefficients on the order of 10⁴–10⁵ mL g⁻¹, even under seawater conditions where large amounts of competitive cations coexist. A membrane filtration experiment using the composite as a membrane at a pressure of 2 bar showed efficient decontamination by removing 180 mg cesium per 1 m² with a high flux of about 148 L m⁻² h⁻¹. Thus, the deposition of KCuHCF nanoadsorbent on the surface of the nanofiber and the adsorption filtration method could be a practical alternative in the radioactive wastewater treatment.

随着大量产生放射性废物的风险的出现，快速和选择性的铯离子净化已成为减少废物量的重要问题。这项研究证明了一种新颖的固定化策略，可以合成嵌入六氰合铁酸钾铜（KCuHCF）的复合吸附剂，以有效分离铯离子。通过静电纺丝技术，由聚合物与聚乙烯醇和海藻酸钠共混并原位制备了纳米纤维基质KCuHCF的固定化是通过羧酸盐官能团的配位作用实现的。通过控制聚合物的比例，可以优化固定化的KCuHCF纳米吸附剂的含量和均匀度，并通过电子显微镜和光谱分析对其进行系统分析。分批实验中的复合吸附剂显示出114 mg g ^-1的高吸附能力，对铯的选择性显示出分布系数约为10 ⁴ –10 ⁵ mL g ^-1，即使在海水中存在大量竞争性阳离子的情况下。在2 bar的压力下使用复合材料作为膜的膜过滤实验表明，每1 m去除180 mg铯，可以实现高效去污^在图2中以大约148 L m ^-2  h ^-1的高通量。因此，KCuHCF纳米吸附剂在纳米纤维表面的沉积和吸附过滤方法可能是放射性废水处理中的一种实用替代方法。