吸附
过氯酸盐
纳米纤维
阳离子聚合
静电纺丝
高氯酸盐
化学
离子交换
化学工程
溴化物
材料科学
无机化学
离子
核化学
高分子化学
纳米技术
锝
有机化学
聚合物
工程类
作者
Dingyang Chen,Zhaoli Liu,Shuying Li,Xiaofei Jing,Yuyang Tian,Wei Hu,Fengchao Cui,Rui Zhao,Guangshan Zhu
标识
DOI:10.1016/j.cej.2022.139148
摘要
Developing cationic adsorbents for efficient radioactive pertechnetate (99TcO4−) removal from water is of great significance in both nuclear fuel management and nuclear-related environmental treatment fields. However, tremendous efforts should be taken to improve the comprehensive performance of the adsorbent materials. Herein, novel cationic electrospun nanofibers were synthesized via the blending electrospinning from the branched polyethylenimine based solution and the following quaternization reaction by benzyl bromide. Consequently, abundant specific anion traps with hydrophobic microenvironment were constructed on the fibers. The obtained fiber adsorbents were systematically investigated to remove perrhenate (ReO4−) ions (the nonradioactive surrogate for TcO4−), which exhibit satisfying adsorption performance in several aspects: high adsorption capacity (943 mg g−1), fast kinetics (30 min), good removal depth (distribution coefficient = 1.1 × 106 mL g−1), large dynamic column adsorption volume (1540 bed volume), and excellent ReO4− capture from solution with high ionic strength or acidity/alkalinity. The adsorption performance surpassed all macroscopic shapeable adsorbents and many powdery advanced porous materials, owing to their abundant adsorption sites, tailored anion traps and macroscopic fibrous structures. Overall, this work gives a useful insight into designing novel adsorbents for effective TcO4−/ReO4− capture.
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