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Preparation of Chitosan/Imidazole Crosslinked Polyamidoxime Hydrogel and Its Performance in Uranium Extraction from Seawater
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He LI1, 2, Shusen CHEN1, 2, Hao LI1, 2, Qi CUI1, 2, Fengju WANG1, 2, Ziming LI1, 2, Yan SONG1, 2, Haotian WU1, 2, Ziming SHANG1, 2
Hydrometallurgy of China | 2026, 45(3) : 383 - 391
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Hydrometallurgy of China | 2026, 45(3): 383-391
• Experiment Research •
Preparation of Chitosan/Imidazole Crosslinked Polyamidoxime Hydrogel and Its Performance in Uranium Extraction from Seawater
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He LI1, 2, Shusen CHEN1, 2, Hao LI1, 2, Qi CUI1, 2, Fengju WANG1, 2, Ziming LI1, 2, Yan SONG1, 2, Haotian WU1, 2, Ziming SHANG1, 2
Affiliations
  • 1.Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing　101149, China
  • 2.National Key Laboratory of Uranium Resources Exploration and Extraction and Nuclear Remote Sensing, Beijing　101149, China
Published: 2026-06-20 doi: 10.13355/j.cnki.sfyj.2026.03.013
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In response to the problems of limited adsorption capacity and susceptibility to interference from ions in the existing seawater uranium extraction hydrogel materials, a novel composite hydrogel adsorbent, chitosan/imidazole crosslinked polyamidoxime hydrogel (CS/PAO@IA) was developed. This material is based on chitosan as the three-dimensional network framework and imidazole-2-formaldehyde as the chemical crosslinking agent. Through hydrogen bond effects and Schiff base reactions, a flexible and strong three-dimensional network was constructed. The correctness of the synthesized material structure was verified by systematic characterization methods, and the microscopic morphology of the material surface and the composition and valence state changes of the elements on the surface after uranium adsorption were analyzed. The uranium adsorption performance and ion selectivity of the material were tested separately. The results show that the material has good adsorption selectivity for uranyl ions in the spiked seawater with uranium mass concentration of 3.3 mg/L, and the uranium adsorption capacity is up to 18.13 mg/g. This study can provide a new idea for the development of efficient, stable and multifunctional hydrogel materials for uranium extraction from seawater.

uranium  /  uranium extraction from seawater  /  hydrogel  /  chemical crosslinking  /  polyamidoxime  /  schiff base  /  adsorption
He LI, Shusen CHEN, Hao LI, Qi CUI, Fengju WANG, Ziming LI, Yan SONG, Haotian WU, Ziming SHANG. Preparation of Chitosan/Imidazole Crosslinked Polyamidoxime Hydrogel and Its Performance in Uranium Extraction from Seawater[J]. Hydrometallurgy of China, 2026 , 45 (3) : 383 -391 . DOI: 10.13355/j.cnki.sfyj.2026.03.013
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Year 2026 volume 45 Issue 3
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Article Info
doi: 10.13355/j.cnki.sfyj.2026.03.013
  • Receive Date：2026-01-27
  • Online Date：2026-09-11
  • Published：2026-06-20
Article Data
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History
  • Received：2026-01-27
  • Revised：2026-03-31
Affiliations
    1.Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing　101149, China
    2.National Key Laboratory of Uranium Resources Exploration and Extraction and Nuclear Remote Sensing, Beijing　101149, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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