Ion desorption is extremely challenging for adsorbents with superior performance, and widely used conventional desorption methods involve high acid or base concentrations and large consumption of reagents. Here, we experimentally demonstrate the rapid and efficient desorption of ions on magnetite-graphene oxide (M-GO) by adding low amounts of Al³⁺. The corresponding concentration of Al³⁺ used is reduced by at least a factor 250 compared to conventional desorption method. The desorption rate reaches ~97.0% for the typical radioactive and bivalent ions Co²⁺, Mn²⁺, and Sr²⁺ within ~1 min. We achieve effective enrichment of radioactive ⁶⁰Co and reduce the volume of concentrated ⁶⁰Co solution by approximately 10 times compared to the initial solution. The M-GO can be recycled and reused easily without compromising its adsorption efficiency and magnetic performance, based on the unique hydration anionic species of Al³⁺ under alkaline conditions. Density functional theory calculations show that the interaction of graphene with Al³⁺ is stronger than with divalent ions, and that the adsorption probability of Al³⁺ is superior than that of Co²⁺, Mn²⁺, and Sr²⁺ ions. This suggests that the proposed method could be used to enrich a wider range of ions in the fields of energy, biology, environmental technology, and materials science.

离子解吸对于性能优越的吸附剂来说极具挑战性，广泛使用的传统解吸方法酸或碱浓度高，试剂消耗量大。在这里，我们通过实验证明了通过添加少量的 Al ³⁺ ，磁铁矿-氧化石墨烯 (M-GO) 上的离子可以快速有效地解吸。^{与传统解吸方法相比，所用的相应 Al 3+}浓度至少降低了 250 倍。对于典型的放射性和二价离子 Co ²⁺、Mn ²⁺和 Sr ²⁺ ，解吸率在~1 分钟内达到~97.0%。我们实现了放射性⁶⁰ Co 的有效富集，减少了浓缩物的体积与初始溶液相比，^{60 Co 溶液增加了约 10 倍。基于 Al 3+}在碱性条件下独特的水合阴离子物种，M-GO 可以轻松回收和再利用，而不会影响其吸附效率和磁性能。密度泛函理论计算表明，石墨烯与Al ³⁺的相互作用强于二价离子，Al ³⁺的吸附概率优于Co ²⁺、Mn ²⁺和Sr ²⁺离子。这表明所提出的方法可用于在能源、生物学、环境技术和材料科学领域富集更广泛的离子。