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Acid-resistant chitosan/graphene oxide adsorbent for Cu 2+ removal: The role of mixed cross-linking and amino-functionalized.
- Source :
-
International journal of biological macromolecules [Int J Biol Macromol] 2024 Jul; Vol. 273 (Pt 1), pp. 133096. Date of Electronic Publication: 2024 Jun 11. - Publication Year :
- 2024
-
Abstract
- Copper ions in wastewater pose a significant threat to human and ecological safety. Therefore, preparing macroscopic adsorbents with reusable and high adsorption performance is paramount. This paper used graphene oxide as the adsorbent and chitosan as the thickener. Additionally, a silane coupling agent was employed to enhance the acid resistance of chitosan, and amino-modification of graphene oxide was performed. Macroscopic adsorbents with high adsorption capacity were fabricated using 3D printing technology. The results show that all five proportions of inks exhibit good printability. Dissolution experiments revealed that all materials maintained structural integrity after 180 days across pH values. Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Photoelectron Spectroscopy (XPS) confirmed the successful preparation of the materials. Adsorption experiments showed that the best performing material ratio was 8 wt% graphene oxide and 7 wt% chitosan. Adsorption kinetics and isothermal adsorption experiments demonstrated that the adsorption process occurred via monolayer chemisorption. The adsorption process was attributed to strong electrostatic forces, van der Waals forces, and nitrogen/oxygen-containing functional group coordination. Cycling experiments showed that the material retained good adsorption performance after 6 cycles, suggesting its potential for practical heavy metal treatment applications.<br />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 /> (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Subjects :
- Adsorption
Kinetics
Hydrogen-Ion Concentration
Water Pollutants, Chemical chemistry
Water Pollutants, Chemical isolation & purification
Water Purification methods
Wastewater chemistry
Cross-Linking Reagents chemistry
Spectroscopy, Fourier Transform Infrared
Photoelectron Spectroscopy
Chitosan chemistry
Graphite chemistry
Copper chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0003
- Volume :
- 273
- Issue :
- Pt 1
- Database :
- MEDLINE
- Journal :
- International journal of biological macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 38866267
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2024.133096