Ion Exchange-Based Microreactors Harness Self-Generated pH Gradients and Long-Range Flow for Dual-Enhanced Uranium Extraction

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2025-06-29 DOI:10.1002/adfm.202509597

Ling Chen, Linhui Fu, Kai Feng, Xinle Zhang, Jiang Gong, Jinping Qu, Ran Niu

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Abstract

Radioactive uranium presents a significant threat to human health and the aquatic ecosystem. Therefore, uranium extraction technologies with high efficiency, environmental friendliness, and high selectivity are highly required, but remain challenging. In this work, a microreactor based on cation-exchange reaction (CIEX) is designed for dual-enhanced uranium extraction. The microreactor with local pH regulation, self-generated long-range flow, abundant functional groups, and the photoreduction greatly enhances the transport of uranium toward the adsorbent, as well as the adsorption of binding sites by breaking the adsorption–desorption equilibrium in an energy-saving and environmentally friendly manner. Benefited from the above, a significant uranium removal capacity of 1556 ± 44.5 mg g⁻¹ is reached within 120 min in 30 mg L⁻¹ uranium solution. Meanwhile, the microreactor shows high selectivity toward uranium among other cations, applicability in various non-marine waters, and good recyclability. This work proposes a unique methodology for autonomous uranium removal with minimized secondary pollution.

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离子交换微反应器利用自产生的pH梯度和远程流进行双强化铀萃取

放射性铀对人类健康和水生生态系统构成重大威胁。因此，对高效、环保、高选择性的铀提取技术提出了很高的要求，但仍然具有挑战性。本文设计了一种基于阳离子交换反应（CIEX）的双强化铀萃取微反应器。微反应器具有局部pH调节、自生远程流动、丰富的官能团、光还原等特点，通过打破吸附-解吸平衡，大大增强了铀向吸附剂的迁移和结合位点的吸附，节能环保。综上所述，在30mg L−1的铀溶液中，在120min内达到1556±44.5 mg g−1的铀去除率。同时，该微反应器对其他阳离子中的铀具有较高的选择性，适用于各种非海洋水域，并具有良好的可回收性。这项工作提出了一种独特的方法来自主去除铀与最小化二次污染。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.