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3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica
3D naturally derived composites consisting of calcium alginate hydrogels (CA) and oxidized biochar obtained from Luffa cylindrica (ox-LC) were synthesized and further evaluated as adsorbents for the removal of U(VI) from aqueous media. Batch-type experiments were conducted to investigate the effect...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10574392/ https://www.ncbi.nlm.nih.gov/pubmed/37834714 http://dx.doi.org/10.3390/ma16196577 |
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author | Ayiotis, Andreas Georgiou, Efthalia Ioannou, Panagiotis S. Pashalidis, Ioannis Krasia-Christoforou, Theodora |
author_facet | Ayiotis, Andreas Georgiou, Efthalia Ioannou, Panagiotis S. Pashalidis, Ioannis Krasia-Christoforou, Theodora |
author_sort | Ayiotis, Andreas |
collection | PubMed |
description | 3D naturally derived composites consisting of calcium alginate hydrogels (CA) and oxidized biochar obtained from Luffa cylindrica (ox-LC) were synthesized and further evaluated as adsorbents for the removal of U(VI) from aqueous media. Batch-type experiments were conducted to investigate the effect of various physicochemical parameters on the adsorption performance of materials. The maximum adsorption capacity (q(max)) was 1.7 mol kg(−1) (404.6 mg·g(−1)) at pH 3.0 for the CA/ox-LC with a 10% wt. ox-LC content. FTIR spectroscopy indicated the formation of inner-sphere complexes between U(VI) and the surface-active moieties existing on both CA and ox-LC, while thermodynamic data revealed that the adsorption process was endothermic and entropy-driven. The experimental data obtained from the adsorption experiments were well-fitted by the Langmuir and Freundlich models. Overall, the produced composites exhibited enhanced adsorption efficiency against U(VI), demonstrating their potential use as effective adsorbents for the recovery of uranium ions from industrial effluents and seawater. |
format | Online Article Text |
id | pubmed-10574392 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-105743922023-10-14 3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica Ayiotis, Andreas Georgiou, Efthalia Ioannou, Panagiotis S. Pashalidis, Ioannis Krasia-Christoforou, Theodora Materials (Basel) Article 3D naturally derived composites consisting of calcium alginate hydrogels (CA) and oxidized biochar obtained from Luffa cylindrica (ox-LC) were synthesized and further evaluated as adsorbents for the removal of U(VI) from aqueous media. Batch-type experiments were conducted to investigate the effect of various physicochemical parameters on the adsorption performance of materials. The maximum adsorption capacity (q(max)) was 1.7 mol kg(−1) (404.6 mg·g(−1)) at pH 3.0 for the CA/ox-LC with a 10% wt. ox-LC content. FTIR spectroscopy indicated the formation of inner-sphere complexes between U(VI) and the surface-active moieties existing on both CA and ox-LC, while thermodynamic data revealed that the adsorption process was endothermic and entropy-driven. The experimental data obtained from the adsorption experiments were well-fitted by the Langmuir and Freundlich models. Overall, the produced composites exhibited enhanced adsorption efficiency against U(VI), demonstrating their potential use as effective adsorbents for the recovery of uranium ions from industrial effluents and seawater. MDPI 2023-10-06 /pmc/articles/PMC10574392/ /pubmed/37834714 http://dx.doi.org/10.3390/ma16196577 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ayiotis, Andreas Georgiou, Efthalia Ioannou, Panagiotis S. Pashalidis, Ioannis Krasia-Christoforou, Theodora 3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica |
title | 3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica |
title_full | 3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica |
title_fullStr | 3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica |
title_full_unstemmed | 3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica |
title_short | 3D Composite U(VI) Adsorbents Based on Alginate Hydrogels and Oxidized Biochar Obtained from Luffa cylindrica |
title_sort | 3d composite u(vi) adsorbents based on alginate hydrogels and oxidized biochar obtained from luffa cylindrica |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10574392/ https://www.ncbi.nlm.nih.gov/pubmed/37834714 http://dx.doi.org/10.3390/ma16196577 |
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