Wax-Casted Macroporous Polyamidoxime Hydrogel Particles Encapsulated in Alginate-Polyacrylic Acid Beads for Highly Efficient Uranium Capture from Seawater

文献类型： 外文期刊

第一作者： Yang, Jiajia

作者： Yang, Jiajia;Geng, Ningbo;Shi, Haitao;Ahmad, Zia;Jiang, Maojun;Qu, Jian;Zhang, Haijun;Chen, Jiping;Huang, Yanqiang;Yang, Jiajia;Chang, Tao;Jiang, Maojun;Li, Yun;Wu, Lidong

作者机构：

关键词： alginate-polyacrylic acid beads; macroporous polyamidoxime hydrogel; seawater; uranium extraction; wax-casting

期刊名称：ADVANCED FUNCTIONAL MATERIALS （ 影响因子：19.0； 五年影响因子：19.4 ）

ISSN： 1616-301X

年卷期： 2025 年 35 卷 14 期

页码：

收录情况： SCI

摘要： Extracting uranium from the ocean is considered a promising solution for meeting nuclear fuel consumption. To date, porous adsorbents fabricated with polyamidoxime (PAO), particularly macroporous PAO hydrogels, have demonstrated exceptional potential for uranium capture from natural seawater. Herein, a novel macroporous PAO hydrogel is developed via a well-designed wax-casting method. The developed wax-casted macroporous PAO (WMPAO) hydrogel particles are subsequently encapsulated in alginate-polyacrylic acid (A-PAA) beads. The obtained A-PAA@WMPAO beads exhibit a high qmax of 687.4 mg-U/g-Ads. and show a good adsorption capacity of 8.23 mg g-1 toward uranium in simulated seawater. Additionally, A-PAA@WMPAO shows good reusability with a 31.2% reduction in uranium adsorption capacity after five consecutive adsorption-desorption cycles. Furthermore, A-PAA@WMPAO displays satisfactory extraction efficiencies of 95.9-99.5% for U-spiked coastal seawater after 10 days of adsorption, achieving adsorption capacities ranging from 207.5 to 3963.2 mu g g-1. Particularly, with the utilization of 4 mg of A-PAA@WMPAO beads, a high adsorption capacity of 4.79 mg g-1 for uranium from 10 L of coastal seawater within 15 days is achieved. These obtained results comprehensively demonstrate the significant potential of the fabricated A-PAA@WMPAO beads for uranium capture from natural seawater.

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