Construction of 4,5 '- diaminodibenzo-18-crown-6-grafted graphene cellulose composite aerogel for efficient and selective adsorption of Cs + from acidic aqueous solution.
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| Title: | Construction of 4,5 '- diaminodibenzo-18-crown-6-grafted graphene cellulose composite aerogel for efficient and selective adsorption of Cs + from acidic aqueous solution. |
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| Authors: | Guo L; School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China., Zheng X; School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China. Electronic address: zheng@cczu.edu.cn., Ma X; School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China., Gu X; School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China., Pan X; School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China., Mei J; School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China., Li Z; School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, PR China. |
| Source: | Environmental research [Environ Res] 2025 Dec 01; Vol. 286 (Pt 2), pp. 122930. Date of Electronic Publication: 2025 Sep 22. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0147621 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-0953 (Electronic) Linking ISSN: 00139351 NLM ISO Abbreviation: Environ Res Subsets: MEDLINE |
| Imprint Name(s): | Publication: <2000- > : Amsterdam : Elsevier Original Publication: New York, Academic Press. |
| MeSH Terms: | Cellulose*/chemistry , Crown Ethers*/chemistry , Graphite*/chemistry , Water Pollutants, Chemical*/chemistry , Cesium*/chemistry, Adsorption ; Gels/chemistry ; Hydrogen-Ion Concentration ; Water Purification/methods |
| Abstract: | Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. The Effective removal of radionuclide substances is a crucial guarantee for the green and long-term advancement of nuclear energy. Due to the chemical properties of radioactive cesium (Cs + ) being highly similar to those of other alkali metals, the separation of Cs + is rather difficult, which leads to it posing a serious radiation hazard to living organisms. Moreover, in acidic environments, it is often difficult to achieve a balance between high selectivity and high adsorption capacity simultaneously, especially in acidic systems. Therefore, it is crucial to develop a method that can efficiently and selectively adsorb Cs + in acidic environments. In this study, through molecular structure design, the dibenzo-18-crown-6 ether cellulose aerogel (GCAE/GFAE) was successfully prepared by covalently linking ammonia-modified dibenzo-18-crown-6 (A18C6) to cellulose nanocrystals (CNC) and nanofibrillated cellulose (CNF). Experimental results show that GCAE/GFAE exhibits excellent adsorption performance for Cs + , with the highest adsorption capability of 31.90 mmgg gg -1 . Even under acidic conditions (pH = 4.0), the adsorption capacity for trace Cs + at 50 ppm can still reach 13.80 mmgg gg -1 . Thermodynamic analysis confirms that the adsorption of Cs + is a spontaneous, enthalpy-driven process, and its mechanism is mainly regulated by the synergistic effect of ion exchange and specific complexation of crown ethers. Furthermore, after multiple cycles of adsorption-desorption, this adsorbent only suffered a 20 % mass loss, demonstrating outstanding cyclic stability and potential for practical engineering applications. (Copyright © 2025 Elsevier Inc. All rights reserved.) |
| Contributed Indexing: | Keywords: (137)Cs(+); Cellulose aerogel; Crown ether; Efficient adsorption; Selective adsorption |
| Substance Nomenclature: | 9004-34-6 (Cellulose) 0 (Crown Ethers) 7782-42-5 (Graphite) 0 (Water Pollutants, Chemical) 0 (Gels) 1KSV9V4Y4I (Cesium) |
| Entry Date(s): | Date Created: 20250924 Date Completed: 20251104 Latest Revision: 20251104 |
| Update Code: | 20251104 |
| DOI: | 10.1016/j.envres.2025.122930 |
| PMID: | 40992451 |
| Database: | MEDLINE |
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Nájsť tento článok vo Web of Science | Abstract: | Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br />The Effective removal of radionuclide substances is a crucial guarantee for the green and long-term advancement of nuclear energy. Due to the chemical properties of radioactive cesium (Cs <sup>+</sup> ) being highly similar to those of other alkali metals, the separation of Cs <sup>+</sup> is rather difficult, which leads to it posing a serious radiation hazard to living organisms. Moreover, in acidic environments, it is often difficult to achieve a balance between high selectivity and high adsorption capacity simultaneously, especially in acidic systems. Therefore, it is crucial to develop a method that can efficiently and selectively adsorb Cs <sup>+</sup> in acidic environments. In this study, through molecular structure design, the dibenzo-18-crown-6 ether cellulose aerogel (GCAE/GFAE) was successfully prepared by covalently linking ammonia-modified dibenzo-18-crown-6 (A18C6) to cellulose nanocrystals (CNC) and nanofibrillated cellulose (CNF). Experimental results show that GCAE/GFAE exhibits excellent adsorption performance for Cs <sup>+</sup> , with the highest adsorption capability of 31.90 mmgg gg <sup>-1</sup> . Even under acidic conditions (pH = 4.0), the adsorption capacity for trace Cs <sup>+</sup> at 50 ppm can still reach 13.80 mmgg gg <sup>-1</sup> . Thermodynamic analysis confirms that the adsorption of Cs <sup>+</sup> is a spontaneous, enthalpy-driven process, and its mechanism is mainly regulated by the synergistic effect of ion exchange and specific complexation of crown ethers. Furthermore, after multiple cycles of adsorption-desorption, this adsorbent only suffered a 20 % mass loss, demonstrating outstanding cyclic stability and potential for practical engineering applications.<br /> (Copyright © 2025 Elsevier Inc. All rights reserved.) |
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| ISSN: | 1096-0953 |
| DOI: | 10.1016/j.envres.2025.122930 |