Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, East China University of Technology, Nanchang 330013, China.
Int J Mol Sci. 2022 Dec 19;23(24):16227. doi: 10.3390/ijms232416227.
The development of adsorption materials which can efficiently isolate and enrich uranium is of great scientific significance to sustainable development and environmental protection. In this work, a novel phosphonic acid-functionalized magnetic microsphere adsorbent FeO/P (GMA-MBA)-PO was developed by functionalized FeO/P (GMA-MBA) prepared by distill-precipitation polymerization with O-phosphoethanolamine. The adsorption process was endothermic, spontaneous and kinetically followed the pseudo second-order model. The maximum uranium adsorption capacity obtained from the Langmuir model was 333.33 mg g at 298 K. In addition, the adsorbent also had good acid resistance and superparamagnetic properties, which could be quickly separated by a magnetic field. XPS analysis showed that the adsorption of adsorbent mainly depended on the complexation of phosphonic acid group with uranium. This work offers a promising candidate for the application of magnetic adsorbents in the field of uranium separation and enrichment.
开发能够高效分离和浓缩铀的吸附材料对于可持续发展和环境保护具有重要的科学意义。在这项工作中，通过蒸馏沉淀聚合与 O-膦乙醇胺反应，制备了一种新型的磷酸功能化磁性微球吸附剂 FeO/P(GMA-MBA)-PO。吸附过程是吸热的、自发的，动力学遵循准二级模型。在 298 K 时，从 Langmuir 模型得到的最大铀吸附容量为 333.33mg g。此外，该吸附剂还具有良好的耐酸性能和超顺磁性，可以通过磁场快速分离。XPS 分析表明，吸附剂的吸附主要取决于磷酸基团与铀的络合作用。这项工作为磁性吸附剂在铀分离和浓缩领域的应用提供了一种很有前途的候选材料。
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