Crossed-linked chitosan coated cuprous oxide microspheres for iodide adsorption via one-step in-situ generation

IF 1.2 4区化学 Q4 CHEMISTRY, ANALYTICAL

Chinese Journal of Analytical Chemistry Pub Date : 2025-02-01 DOI:10.1016/j.cjac.2024.100487

Min LI , Qing LI , Lijie LI , Zixuan XU , Jie AN , Gaohong HE , Zhifang WU , Sijin LI , Wenjun ZHANG

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Abstract

Radioactive iodine waste generated from nuclear power and radioactive medical treatments has become a serious environmental issue, raising concerns about public health. Cross-linked chitosan adsorbed iodide anions through electrostatic attraction yet limit-efficiently. To achieve better adsorption performance, chitosan-coated cuprous oxide microspheres (Cu₂O@CM) was proposed via one-step in-situ liquid-phase method. Both Cu₂O@CM-e cross-linked with epichlorohydrin and Cu₂O@CM-g cross-linked with glutaraldehyde, performing rough and spherical morphology, exhibited rapid iodine removal capacities of 0.1843 mmol/g for Cu₂O@CM-e and 0.1819 mmol/g for Cu₂O@CM-g within just 10 min. The adsorption process occurred through a combination of physical multilayer adsorption and chemical monolayer adsorption, driven spontaneously and endothermically. After four regeneration cycles, Cu₂O@CM-e and Cu₂O@CM-g maintained almost identical adsorption efficiencies, highlighting their reusability. Considering the interference of Cl^– and CO₃^2–, both adsorbents showed significant selectivity towards competing ions. Thus, both adsorbents showed promising potential for the removal of iodine waste

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来源期刊

Chinese Journal of Analytical Chemistry 化学-分析化学

CiteScore

3.60

自引率

25.00%

发文量

17223

审稿时长

35 days

期刊介绍： Chinese Journal of Analytical Chemistry(CJAC) is an academic journal of analytical chemistry established in 1972 and sponsored by the Chinese Chemical Society and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Its objectives are to report the original scientific research achievements and review the recent development of analytical chemistry in all areas. The journal sets up 5 columns including Research Papers, Research Notes, Experimental Technique and Instrument, Review and Progress and Summary Accounts. The journal published monthly in Chinese language. A detailed abstract, keywords and the titles of figures and tables are provided in English, except column of Summary Accounts. Prof. Wang Erkang, an outstanding analytical chemist, academician of Chinese Academy of Sciences & Third World Academy of Sciences, holds the post of the Editor-in-chief.