ABSTRACT A novel amine-functionalized magnetic large-pore SBA-15 obtained via in situ approach and the post-grafting method was employed as a new adsorbent for removal of uranium from aqueous solutions. Results indicated that the as-prepared adsorbent exhibited fast adsorption rates in the first hour, at the optimum pH 6. The adsorption process was fitted well to the Langmuir isothermal and the maximum adsorption capacity obtained from the Langmuir model was 395.05 mg/g for NH2-M-SBA-15 sample. The kinetics of the uranium adsorption process over NH2-M-SBA-15 was described by pseudo-second-order kinetics. In comparison with the pristine large-pore SBA-15, the adsorption performance of NH2-M-SBA-15 was improved significantly. The thermodynamic parameters revealed that the adsorption of uranium on the material was spontaneous and endothermic. Furthermore, excellent recyclability could be achieved even after four consecutive adsorption-desorption cycles.

中文翻译：

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使用胺官能化磁性血小板大孔 SBA-15 从水溶液中去除铀

摘要 采用原位方法和后接枝法获得的新型胺官能化磁性大孔 SBA-15 作为一种新的吸附剂，用于从水溶液中去除铀。结果表明，所制备的吸附剂在最佳 pH 值为 6 的第一个小时内表现出快速吸附速率。吸附过程非常适合朗缪尔等温，从朗缪尔模型获得的最大吸附容量为 395.05 mg/g NH2 -M-SBA-15 样品。NH2-M-SBA-15 上铀吸附过程的动力学由拟二级动力学描述。与原始大孔SBA-15相比，NH2-M-SBA-15的吸附性能显着提高。热力学参数表明铀在材料上的吸附是自发和吸热的。