The separation of rare earth elements (REEs) has been a persistent challenge in the industrial sector. Despite the development of numerous adsorption materials for rare earth element separation, achieving high adsorption capacity and superior separation selectivity from these materials simultaneously has proven difficult. In this study, we synthesized a nanocomposite material called CoFeM@Be_IIM by combining bentonite clay’s good adsorption capacity with cobalt ferrite’s superior magnetic separation performance (CoFeO) and ion-imprinted materials’ high target separation selectivity (IIMs). We used surface ion-imprinting technique to create the material. The ion-imprinted material has a maximum adsorption capacity of 87.6 mg/g for Gd(III), with a selectivity of Gd/La ≈ 28.6, Gd/Nd ≈ 22.6, and Gd/Y ≈ 15.2. The Gd(III)-CoFeM@Be_IIM showed good reusability for up to five cycles. Our work presents a new magnetic ion-imprinted nano-adsorbent as a reliable and effective solution for recovering and utilizing REEs from industrial wastewater.

中文翻译：

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磁性离子印迹纳米复合材料选择性分离钆的协同性能


稀土元素（REE）的分离一直是工业领域的一个持续挑战。尽管开发了许多用于稀土元素分离的吸附材料，但事实证明，同时从这些材料获得高吸附容量和优异的分离选择性是很困难的。在这项研究中，我们将膨润土良好的吸附能力与钴铁氧体优越的磁分离性能（CoFeO）和离子印迹材料的高目标分离选择性（IIM）相结合，合成了一种名为CoFeM@Be_IIM的纳米复合材料。我们使用表面离子压印技术来创建该材料。离子印迹材料对 Gd(III) 的最大吸附容量为 87.6 mg/g，选择性为 Gd/La ≈ 28.6、Gd/Nd ≈ 22.6 和 Gd/Y ≈ 15.2。 Gd(III)-CoFeM@Be_IIM 在长达五个周期内表现出良好的可重复使用性。我们的工作提出了一种新型磁性离子印迹纳米吸附剂，作为从工业废水中回收和利用稀土元素的可靠且有效的解决方案。