Anchoring nZVI on metal-organic framework for removal of uranium(VI) from aqueous solution
Anchoring nZVI on metal-organic framework for removal of uranium(VI) from aqueous solution
复制标题
将 nZVI 锚定在金属有机框架上用于从水溶液中去除铀 (VI)
DOI：
10.1016/j.jssc.2018.09.013
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Feng Luo
中科院分区：
文献类型：
--
作者：
Jian Hong Li;Li Xiao Yang;Jian Qiang Li;Wen Hui Yin;Yuan Tao;Hui Qiong Wu;Feng Luo
铀是核工业和核技术应用中放射性最强的元素。然而，由于其高毒性和高流动性，对环境和人类健康是有害的。因此，设计有效的铀去除材料是非常必要的。本文通过将nZVI固定在Zn-MOF-74上，制备了一种新型的吸附剂nZVI@Zn-MOF-74，并将其用于水溶液中铀的吸附。令人印象深刻的是，nZVI首次通过喷雾方法以简单方便的方式合成。实验结果表明，与Zn-MOF-74材料和nZVI相比，nZVI@Zn-MOF-74材料对U（VI）的去除效果更好，在pH = 3和298 K时，吸附容量高达348 mg/g。如XPS所揭示的，起源是由于U（VI）从Zn-MOF-74的吸附和U（VI）通过nZVI还原为U（IV）。
Uranium is the most radioactive element using in the nuclear industry and nuclear technology application. However, it is harmful for environment and human health due to its high toxicity and mobility. Thus designing effective material for uranium removal is highly desirable. In this paper, a novel adsorbent of nZVI@Zn-MOF-74 prepared by anchoring nZVI on Zn-MOF-74 was investigated for the removal of uranium from aqueous solutions. Impressively, nZVI was synthesized for the first time by a spraying approach in a simple and convenient manner. The experimental results indicated that nZVI@Zn-MOF-74 can significantly enhance the removal of U(VI) than both Zn-MOF-74 material and nZVI, leading to high adsorption capacity up to 348 mg/g at pH = 3 and 298 K. The origin, as unveiled by XPS, is due to both U(VI) adsorption from Zn-MOF-74 and U(VI)-to-U(IV) reduction by nZVI.