4.6 Article

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

Journal

JOURNAL OF SOLID STATE CHEMISTRY
Volume 269, Issue -, Pages 16-23

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2018.09.013

Keywords

nZVI; Metal-organic frameworks; Composites; Uranium(VI) removal

Funding

  1. NSF of China [21661001, 21661002]
  2. Natural Science Foundation of Jiangxi Province of China [GJJ160542]

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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.

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