铀
吸附
铀酰
聚丙烯腈
海水
萃取(化学)
膜
化学
纤维素纤维
朗缪尔吸附模型
中空纤维膜
化学工程
纤维
色谱法
纤维素
核化学
高分子化学
材料科学
有机化学
聚合物
冶金
地质学
工程类
海洋学
生物化学
作者
Ying Wang,Yaopeng Zhang,Qian Li,Yanxiang Li,Lixia Cao,Wangliang Li
标识
DOI:10.1016/j.carbpol.2020.116627
摘要
Uranium extraction from seawater is considered as an efficient strategy to meet the increasing demands of uranium. Amidoxime has been reported as one of the most efficient groups for uranium affinity. Herein, amidoximated cellulose fibers were synthesized by grafting polyacrylonitrile (PAN) onto cellulose fibers followed by amidoxime modification. The amidoximated cellulose fibers showed maximum adsorption capacity of 52.88 mg g−1 (pH = 5.0), and its static adsorption process was well fitted with Langmuir model and Pseudo-second-order kinetics. The adsorption mechanism was attributed to the chelating reaction between uranyl complexes and amidoximated cellulose fibers. The prepared fibers were further fabricated into nonwoven membrane for dynamic adsorption, and the breakthrough curves were well fitted to Dose-Response model. The amidoximated cellulose fiber membrane showed a good adsorption capacity of 1.22 mg g-1 at pH 8.0 after filtrating 10.0 L simulated seawater, demonstrating promising efficient engineering materials for uranium extraction from seawater.
科研通智能强力驱动
Strongly Powered by AbleSci AI