基于魔芋葡甘聚糖热敏水凝胶的溶胶-凝胶转变效应光辅助铀富集（英文）
作者机构：State Key Laboratory of Environment-friendly Energy Materials School of Life Science and Engineering School of National Defense of Science and Technology NationalCo-innovation Center for Nuclear Waste Disposal and Environmental Safety Sichuan Civil-military Integration Institute Southwest University of Science and Technology College of Science National University of Defense Technology
出 版 物：《Science Bulletin》 (科学通报(英文版))
年 卷 期：2024年第19期
页 面：3042-3054页
核心收录：
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 082704[工学-辐射防护及环境保护] 07[理学] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0827[工学-核科学与技术] 0713[理学-生态学]
基 金：supported by the National Natural Science Foundation of China (21976147, U2267224, and 22106126) the Sichuan Science and Technology Program (2021YFG0096, 2024NSFSC1148, 2022YFG0371, and 2024NSFTD0012) the Project of State Key Laboratory of Environmentfriendly Energy Materials in Southwest University of Science and Technology (21fksy22) the Research Fund of Southwest University of Science and Technology for PhD (23zx7103) the Open Fund of China National Nuclear Corporation Key Laboratory for Uranium Extraction from Seawater (KLUES202201)
摘 要：Exploiting the intelligent photocatalysts capable of phase separation provides a promising solution to the removal of uranium, which is expected to solve the difficulty in separation and the poor selectivity of traditional photocatalysts in carbonate-containing uranium wastewater. In this paper, the γ-FeOOH/konjac glucomannan grafted with phenolic hydroxyl groups/poly-N-isopropylacrylamide(γ-FeOOH/KGM(Ga)/PNIPAM) thermosensitive hydrogel is proposed as the photocatalysts for extracting uranium from carbonate-containing uranium wastewater. The dynamic phase transformation is demonstrated to confirm the arbitrary transition of γ-FeOOH/KGM(Ga)/PNIPAM thermosensitive hydrogel from a dispersed state with a high specific surface area at low temperatures to a stable aggregated state at high temperatures. Notably, the γ-FeOOH/KGM(Ga)/PNIPAM thermosensitive hydrogel achieves a remarkably high rate of 92.3% in the removal of uranium from the wastewater containing carbonates and maintains the efficiency of uranium removal from uranium mine wastewater at over 90%. Relying on electron spin resonance and free radical capture experiment, we reveal the adsorption-reduction-nucleation-crystalliza tion mechanism of uranium on γ-FeOOH/KGM(Ga)/PNIPAM thermosensitive hydrogel. Overall, this strategy provides a promising solution to treating uranium-contaminated wastewater, showing a massive potential in water purification.
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