文献类型：期刊文献

英文题名：Incorporation Phytic acid-modified chitosan/sodium alginate melamine sponge composite for highly efficient uranium adsorption

作者：Yang, Fang[1];Zhong, Xingyu[1];Lu, Lihong[1];Shi, Hongfa[1];Liu, Xin[1];Zhang, Wenqing[1];Zhang, Lingfan[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2025

卷号：318

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20252418607297);WOS:【SCI-EXPANDED(收录号:WOS:001513412100010)】；

基金：This work was supported by the National Natural Science Foundation of China [grant number 21407050] . We also thank the Research Center of Analysis and Test (ECUST) for help on data and characterization.

语种：英文

外文关键词：Phytic acid; Chitosan-sodium alginate composite; Uranium adsorption

摘要：The fabrication of composite materials that exhibit facile separability while retaining exceptional adsorption capacity for uranium adsorption remains a challenge. In this study, phytic acid-modified chitosan/sodium alginate@melamine sponge composite (PCSS@MS) was successfully fabricated via a cross-linking approach. The obtained PCSS@MS was applied to evaluate the adsorption properties for uranium from solutions. SEM and XRD characterization confirmed the material's stable three-dimensional porous architecture. The adsorption experiments revealed that PCSS@MS demonstrates highly uranium adsorption capability across a broad pH range, achieving a maximum adsorption capacity of 297.86 mg g(-1) at 318 K. PCSS@MS exhibited >95 % U(VI) removal efficiency at 200 mg/L under optimal conditions (pH = 5, 298.15 K, 80 mg). Furthermore, the adsorbent retained a remarkable 70.8 % uranium removal rate after four consecutive adsorption-desorption cycles. The adsorption behavior was consistent with the pseudo-second-order model and Temkin isotherm model, indicating the existence of multiple adsorption sites on the surface and the chemisorption process. FTIR and XPS analyses revealed that phosphate groups played a dominant role in U(VI) binding, with auxiliary contributions from amino, carboxyl, and hydroxyl groups. The synergistic coordination among these functional groups enhanced uranium adsorption abilities. These findings highlight PCSS@MS as a promising adsorbent for efficient uranium extraction from aqueous solutions.