A new approach for efficient removal of radioactive ¹³⁷Cs was developed using a sodium alginate hydrogel beads-based adsorbent containing chemically bound Prussian blue (PB). Sodium alginate was crosslinked with Fe (III) ions to form hydrogel beads, in which Fe (III) had a dual function; it served as a crosslinking agent and also led to PB formation via reaction with hexacyanoferrate. Fe (III) ions, an unusual crosslinking agent for sodium alginate gel, led to stable, homogeneous distribution of PB inside the beads. The amount of embedded PB in the composite beads was more than two times larger than in the conventional sodium alginate-PB composite beads, resulting in an adsorption capacity for Cs ions that was two to five times higher, mainly because of a higher PB contents and because of the microporosity of the sodium alginate hydrogel.

有效去除放射性物质的新方法¹³⁷使用含有化学键合的普鲁士蓝（PB）的藻酸钠水凝胶珠基吸附剂开发了Cs。海藻酸钠与Fe（III）离子交联形成水凝胶珠，其中Fe（III）具有双重功能。它用作交联剂，并通过与六氰合铁酸酯反应导致形成PB。Fe（III）离子是藻酸钠凝胶的一种特殊的交联剂，可导致PB在珠粒内部稳定，均匀地分布。复合珠中PB的嵌入量是常规藻酸钠-PB复合珠的两倍以上，导致对Cs离子的吸附能力高出二到五倍，这主要是由于PB含量较高和因为藻酸钠水凝胶的微孔性。