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| Adsorption Performance of Indole-3-Carboxaldehyde/Isatin Modified Chitosan for Iodine |
| LYU Ruidong1, SONG Luna2, AN Kang1, LIU Xing1, QIN Yan1, DU Funa1, YU Jingwen1✱
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| 1. Lu’an Chemical Group Co., Ltd., Changzhi 046204, China; 2. Shanxi Institute of Energy, Jinzhong 030600, China |
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Abstract Two polymers (I3CAld-Ch-POP and Isatin-Ch-POP) were obtained by imination reaction of chitosan with indole-3-carboxaldehyde and isatin, respectively. Their iodine adsorption performance in KI3 aqueous solution and the structure-activity relationship were investigated. The modification of chitosan with indole-3-carboxaldehyde improved the adsorption effect toward iodine species. After adsorption for 48 h in 3 mL of 100 mg/mL KI3 aqueous solution with 50.0 mg of I3CAld-Ch-POP, the I2 adsorption capacity reached 2.358 g/g, and 80.4% of the I2 adsorption efficiency was maintained after three cycles. The adsorption process of I3CAld-Ch-POP toward iodine species involved both physical adsorption and chemical adsorption. The excellent adsorption and regeneration performance make I3CAld-Ch-POP a potential adsorbent for iodine in aqueous phase.
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Published: 11 July 2026
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