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.

铀是核工业和核技术应用中使用的最具放射性的元素。然而，由于其高毒性和迁移性，因此对环境和人类健康有害。因此，非常需要设计用于去除铀的有效材料。本文研究了通过将nZVI锚定在Zn-MOF-74上制备的新型nZVI @ Zn-MOF-74吸附剂，用于从水溶液中去除铀。令人印象深刻的是，nZVI首次以简单便捷的方式通过喷涂方法合成。实验结果表明，与Zn-MOF-74材料和nZVI相比，nZVI @ Zn-MOF-74可以显着增强U（VI）的去除，从而 在pH = 3和298时具有高达348 mg / g的高吸附能力。 K. XPS揭示的起源是由于Zn-MOF-74吸附了U（VI）以及nZVI还原了U（VI）到U（IV）。