Efficient and selective capture of lanthanides from radioactive wastewater containing excessive diverse concentrated salts is challenging but urgently demanded for environmental protection and human health. Herein, we present an effective approach for Eu³⁺ uptake from complex aqueous solutions by using two layered sulfide adsorbents (Me₂NH₂)₂(Ga₂Sb₂S₇)·H₂O (FJSM-GAS-1) and (Et₂NH₂)₂(Ga₂Sb₂S₇)·H₂O (FJSM-GAS-2). Both adsorbents exhibit ultrafast kinetics (within 2 min) and high absorption capacities for Eu³⁺ (127.7 and 115.8 mg/g for FJSM-GAS-1 and FJSM-GAS-2, respectively). The distribution coefficient (K_d) can be as high as 6.39 × 10⁵ and 6.00 × 10⁵ mL/g for FJSM-GAS-1 and FJSM-GAS-2, respectively, exceeding that of reported Eu³⁺ adsorbents. They still display high selectivity for Eu³⁺ in presence of excessive competitive cations (e.g., Na⁺ and K⁺). Particularly, high K_d values remain for Eu³⁺ removal from Eu³⁺-contaminated tap, lake and sea water, and lanthanides recovery from acidic industrial wastewater. Absorbed Eu³⁺ ions can be facilely eluted using a low-cost method. The adsorption mechanism, illuminated via DFT calculations coupled with characterizations of EA, Raman, XPS and EXAFS, is ion exchange between Eu³⁺ and interlayered cations owing to the strong interactions between Eu³⁺ and framework S^2-. This work confirms that layered sulfides are promising adsorbents for efficient removal of lanthanides/actinides from wastewater for environmental remediation.

从含有过量多样的浓盐的放射性废水中有效和选择性地捕获镧系元素具有挑战性，但迫切需要环境保护和人类健康。在这里，我们提出了一种有效的方法，通过使用两层硫化物吸附剂（Me ₂ NH ₂）₂（Ga ₂ Sb ₂ S ₇）·H ₂ O（FJSM-GAS-1）从复合水溶液中吸收Eu ³⁺（FJSM-GAS-1）和（ Et ₂ NH ₂）₂（Ga ₂ Sb ₂ S ₇）·H ₂ O（FJSM-GAS-2）。两种吸附剂均表现出超快的动力学（在2分钟内）和对Eu ^3+的高吸收能力（FJSM-GAS-1和FJSM-GAS-2分别为127.7和115.8 mg / g ）。FJSM-GAS-1和FJSM-GAS-2的分布系数（K _d）分别高达6.39×10 ⁵和6.00×10 ⁵ mL / g ，超过了报道的Eu ³⁺吸附剂。在过量竞争性阳离子（例如Na ⁺和K ⁺）存在下，它们仍然对Eu ³⁺具有很高的选择性。特别是高K _d值保持为铕³⁺选自Eu去除³⁺ -contaminated抽头，湖泊和海水，和镧系元素恢复从酸性工业废水。吸收的Eu ³⁺离子可以使用低成本方法轻松洗脱。通过DFT计算以及EA，拉曼，XPS和EXAFS的表征阐明的吸附机理是Eu ³⁺与层间阳离子之间的离子交换，这归因于Eu ³⁺与骨架S ^2-之间的强相互作用。这项工作证实了层状硫化物是有望从废水中有效去除镧系元素/ act系元素以进行环境修复的吸附剂。