MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China.
Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China.
Bull Environ Contam Toxicol. 2021 Jan;106(1):165-174. doi: 10.1007/s00128-020-02883-0. Epub 2020 May 28.
Adsorbents with the combination of magnetic separation and removal performance are expected for reducing the adverse impact of nuclear pollution. In this study, the core-shell FeO@polydopamine (FeO@PDA) was successfully synthesized and used for removal of uranium (U(VI)) ion from aqueous solution. The abundant N-containing groups derived from PDA exist as the chelate sites for U(VI) and contribute greatly for U(VI) removal. Experimental results show that FeO@PDA (56.39 mg g) exhibits greater sorption capacity for U(VI) removal compared with the pure FeO (9.17 mg g). The sorption isotherm can be well fitted with Freundlich model and the sorption process is endothermic and spontaneous. The removal of U(VI) can be explained by the complexation of U(VI) with -NH-, -NH and C-O in the surface of FeO@PDA by X-ray photoelectron spectroscopy (XPS) analysis.
期望具有磁性分离和去除性能的吸附剂能够减少核污染的不利影响。在这项研究中，成功合成了核壳型 FeO@聚多巴胺（FeO@PDA），并将其用于从水溶液中去除铀（U(VI)）离子。PDA 中丰富的含 N 基团作为 U(VI)的螯合位点，对 U(VI)的去除有很大的贡献。实验结果表明，FeO@PDA（56.39mg g）的 U(VI)去除吸附容量大于纯 FeO（9.17mg g）。吸附等温线可以很好地拟合 Freundlich 模型，吸附过程是吸热和自发的。通过 X 射线光电子能谱（XPS）分析表明，FeO@PDA 表面的-NH-、-NH 和 C-O 与 U(VI)发生络合，对 U(VI)的去除进行了很好的解释。
