Ion-exchange induced multiple effects to promote uranium uptake from nonmarine water by micromotors

IF 12.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Hazardous Materials Pub Date : 2024-11-09 DOI:10.1016/j.jhazmat.2024.136464

Linhui Fu, Kai Feng, Qianqian Li, Mengting Qin, Jing Yang, Xinle Zhang, Ling Chen, Jiang Gong, Jinping Qu, Ran Niu

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Abstract

As the fundamental resource in nuclear energy, uranium is a sword of two sides, due to its radioactive character that could cause severe impact to the environment and living creatures once released by accident. However, limited by the passive ion transport, the currently available uranium adsorbents still suffer from low adsorption kinetics and capacity. Here, we report a self-driven modular micro-reactor composed of magnetizable ion-exchange resin and adsorbents that can be used to dynamically remove uranium from nonmarine waters. Because of the long-range pH gradient and phoretic flow established by the recyclable ion-exchange resin, the micro-reactor shows a fast uranium adsorption rate and reaches a uranium extraction capacity of 629.3 mg g^-1 within 10 min in 30 ppm uranium solution, as well as good recyclability in repeated use. Numerical simulation result confirms that the phoretic flow and electric field accelerate uranium transport to the adsorbent. Our work provides a new solution for the removal of radioactive uranium with high efficiency.

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离子交换诱导多重效应，促进微电机从非海水中吸收铀

作为核能的基础资源，铀具有放射性，一旦意外泄漏会对环境和生物造成严重影响，因此铀是一把双面剑。然而，受限于被动离子传输，现有的铀吸附剂仍然存在吸附动力学和吸附容量低的问题。在此，我们报告了一种由可磁化离子交换树脂和吸附剂组成的自驱动模块化微反应器，可用于动态去除非海水中的铀。由于可回收离子交换树脂所建立的长程 pH 梯度和 phoretic 流动，该微反应器显示出快速的铀吸附速率，在 30ppm 的铀溶液中，10 分钟内铀萃取能力达到 629.3 mg g-1，并且在重复使用时具有良好的可回收性。数值模拟结果证实，涡流和电场加速了铀向吸附剂的迁移。我们的工作为高效去除放射性铀提供了一种新的解决方案。

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来源期刊

Journal of Hazardous Materials 工程技术-工程：环境

CiteScore

25.40

自引率

5.90%

发文量

3059

审稿时长

58 days

期刊介绍： The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.