Rapid and efficient uranium(VI) capture by phytic acid/polyaniline/FeOOH composites.
Rapid and efficient uranium(VI) capture by phytic acid/polyaniline/FeOOH composites.
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DOI：
10.1016/j.jcis.2017.09.054
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发表时间：
2018-02
影响因子：
9.9
通讯作者：
Xintao Wei;Qi Liu;Hongsen Zhang;Jingyuan Liu;Rongrong Chen;Rumin Li;Zhangshuang Li;Peili Liu
中科院分区：
文献类型：
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作者：
Xintao Wei;Qi Liu;Hongsen Zhang;Jingyuan Liu;Rongrong Chen;Rumin Li;Zhangshuang Li;Peili Liu
铀在核能中起着不可或缺的作用，但土地资源有限，无法满足日益增长的需求;因此，需要开发用于从水中捕获铀的有效材料。本文采用氧化聚合法合成了植酸/聚苯胺/FeOOH复合吸附剂（PA/PANI/FeOOH）。植酸作为聚苯胺的胶凝剂和掺杂剂，在聚苯胺的形成过程中起着重要的作用。PA/PANI/FeOOH表现出高吸附容量（qm= 555.8 mg g−1，T = 298 K）、快速吸附速率（5 min内）、优异的选择性和循环稳定性。吸附等温线符合Langmuir吸附等温式，吸附动力学符合准二级动力学模型。XPS分析表明，PA/PANI/FeOOH对铀的去除主要归因于其表面丰富的胺基和亚胺基。重要的是，从低浓度的模拟海水中去除铀是高效的，去除率超过92%。从我们的研究，上级吸附容量，沿着低成本，环境友好和容易的合成，揭示PA/PANI/FeOOH作为一个有前途的材料，用于铀捕获。
Uranium plays an indispensable role in nuclear energy, but there are limited land resources to meet the ever growing demand; therefore, a need exists to develop efficient materials for capturing uranium from water. Herein, we synthesize a promising adsorbent of phytic acid/polyaniline/FeOOH composites (PA/PANI/FeOOH) by oxidative polymerization. Phytic acid, acting as a gelator and dopant, plays an important role in the formation of polyaniline (PANI). The PA/PANI/FeOOH exhibites high adsorption capacity (qm= 555.8 mg g−1, T = 298 K), rapid adsorption rate (within 5 min), excellent selectivity and cyclic stability. In addition, the results show that the adsorption isotherm is well fitted to the Langmuir isotherm model, and the adsorption kinetics agree with a pseudo-second order model. XPS analysis indicates that the removal of uranium is mainly attributed to abundant amine and imine groups on the surface of PA/PANI/FeOOH. Importantly, the removal of uranium from low concentrations of simulated seawater is highly efficient with a removal rate exceeding 92%. From our study, superior adsorption capacities, along with a low-cost, environmentally friendly and facile synthesis, reveal PA/PANI/FeOOH as a promising material for uranium capture.