Anchoring nZVI on metal-organic framework for removal of uranium(Ⅵ) from aqueous solution

Publication date: January 2019Source: Journal of Solid State Chemistry, Volume 269Author(s): Jian Hong Li, Li Xiao Yang, Jian Qiang Li, Wen Hui Yin, Yuan Tao, Hui Qiong Wu, Feng LuoAbstractUranium 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.Graphical abstractThe experimental results indicate that nZVI@Zn-MOF-74 adsorption uranium is synergistic effect by the adsorption of Zn-MOF-74 and reduction by nZVI.
Source: Journal of Solid State Chemistry - Category: Chemistry Source Type: research