Synthesis of PAO NFs and the adsorption for uranium (VI) in alkaline solution
Synthesis of PAO NFs and the adsorption for uranium (VI) in alkaline solution
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DOI：
10.1007/s10967-021-08083-2
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发表时间：
2021-11
影响因子：
1.6
通讯作者：
Xinglei Wang;Jingbo Zhou;Zhen Zhang;Jie Li;Hongxia Zhang
中科院分区：
文献类型：
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作者：
Xinglei Wang;Jingbo Zhou;Zhen Zhang;Jie Li;Hongxia Zhang
通过正交实验确定了最佳纺丝工艺条件，并采用静电纺丝技术制备了具有良好形貌和吸附性能的聚酰胺肟纳米纤维。采用SEM、FTIR、NMR和元素分析等手段对PAO纳米纤维进行了表征。研究了时间、固液比、pH、离子强度、初始浓度和温度等因素对PAO纳米纤维吸附U（VI）的影响。PAO NFs对U（VI）的吸附符合准一级/二级动力学模型和Langmuir模型，且线性方程较好。最大吸附量为118 mg/g。铀酰离子与偕胺肟基的肟氧和胺氮配位。PAO NFs有望高效经济地从海水中提取铀。
In this study, the optimum spinning conditions were determined by orthogonal experiment, and polyamide oxime nanofibers (PAO NFs) with excellent morphology and adsorption were prepared by electrospinning oxime solution. PAO NFs were characterized by SEM, FTIR, NMR and elemental analysis. The effects of time, solid–liquid ratio, pH, ionic strength, initial concentration and temperature on U(VI) adsorption on PAO NFs were studied. U(VI) adsorption on PAO NFs fitted well by the pseudo first/second-order kinetic model and Langmuir model with linear equation. The maximum adsorption was 118 mg/g. Uranyl ion was coordinated with oxime oxygen and amine nitrogen of the amidoxime group. PAO NFs is expected to extract uranium from seawater efficiently and economically.