Facile fabrication of hierarchical PVDF/Mg–Al LDH/chitosan membrane for textile wastewater remediation: role of LDH in anchoring chitosan
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| Název: | Facile fabrication of hierarchical PVDF/Mg–Al LDH/chitosan membrane for textile wastewater remediation: role of LDH in anchoring chitosan |
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| Autoři: | Xue, Yongtao, 1992, Shao, Jieling, 1993, Lê, Xuân Huy, 1998, Chew, Jia Wei, 1981 |
| Zdroj: | Journal of Membrane Science. 739 |
| Témata: | Textile wastewater, Hierarchical membrane, Chitosan, Structural bridging role, Layered double hydroxides |
| Popis: | Layered double hydroxides (LDHs), as two-dimensional nanomaterials with abundant hydroxyl groups and unique layered structures, have been shown to be promising candidates to improve membrane properties for enhancing textile wastewater remediation. In this study, a PVDF/Mg–Al LDH membrane was prepared through a non-solvent-induced phase separation method, and then the hierarchical PVDF/Mg–Al LDH/chitosan membrane was fabricated through a facile filtration process. The resulting optimized membrane demonstrated an acceptable water permeance (2.3 L m −2 h −1 bar −1 ) and excellent separation efficiency for mixtures of dye and salt (i.e., rejections of 99.9 % for Congo red, 100 % for Methyl blue, and <20 % for NaCl). Notably, the separation factor of the PVDF/Mg–Al LDH/chitosan membrane for Congo red/NaCl reached up to 1934, surpassing most membranes reported in the literature. In addition, the hybrid membrane demonstrated outstanding antifouling performance (flux recovery ratio of 92.68 % for Methyl blue and 90.31 % for Congo red), and high stability under acidic and alkaline conditions. Characterization results and mechanism analysis indicate that the Mg–Al LDH nanoparticles not only improved the membrane's hydrophilicity and modulated its structure, but also played a structural bridging role within the membrane to anchor chitosan through hydrogen bonding. Mechanistic studies confirm that the size-sieving and Donnan effects were responsible for the separation of dyes and salts. This study unveils the structural bridging role of Mg–Al LDH within the membrane and provides new insights into the facile fabrication of hybrid membranes for efficient textile wastewater remediation. |
| Popis souboru: | electronic |
| Přístupová URL adresa: | https://research.chalmers.se/publication/549368 https://research.chalmers.se/publication/549368/file/549368_Fulltext.pdf |
| Databáze: | SwePub |
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| Items | – Name: Title Label: Title Group: Ti Data: Facile fabrication of hierarchical PVDF/Mg–Al LDH/chitosan membrane for textile wastewater remediation: role of LDH in anchoring chitosan – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xue%2C+Yongtao%22">Xue, Yongtao</searchLink>, 1992<br /><searchLink fieldCode="AR" term="%22Shao%2C+Jieling%22">Shao, Jieling</searchLink>, 1993<br /><searchLink fieldCode="AR" term="%22Lê%2C+Xuân+Huy%22">Lê, Xuân Huy</searchLink>, 1998<br /><searchLink fieldCode="AR" term="%22Chew%2C+Jia+Wei%22">Chew, Jia Wei</searchLink>, 1981 – Name: TitleSource Label: Source Group: Src Data: <i>Journal of Membrane Science</i>. 739 – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Textile+wastewater%22">Textile wastewater</searchLink><br /><searchLink fieldCode="DE" term="%22Hierarchical+membrane%22">Hierarchical membrane</searchLink><br /><searchLink fieldCode="DE" term="%22Chitosan%22">Chitosan</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+bridging+role%22">Structural bridging role</searchLink><br /><searchLink fieldCode="DE" term="%22Layered+double+hydroxides%22">Layered double hydroxides</searchLink> – Name: Abstract Label: Description Group: Ab Data: Layered double hydroxides (LDHs), as two-dimensional nanomaterials with abundant hydroxyl groups and unique layered structures, have been shown to be promising candidates to improve membrane properties for enhancing textile wastewater remediation. In this study, a PVDF/Mg–Al LDH membrane was prepared through a non-solvent-induced phase separation method, and then the hierarchical PVDF/Mg–Al LDH/chitosan membrane was fabricated through a facile filtration process. The resulting optimized membrane demonstrated an acceptable water permeance (2.3 L m −2 h −1 bar −1 ) and excellent separation efficiency for mixtures of dye and salt (i.e., rejections of 99.9 % for Congo red, 100 % for Methyl blue, and <20 % for NaCl). Notably, the separation factor of the PVDF/Mg–Al LDH/chitosan membrane for Congo red/NaCl reached up to 1934, surpassing most membranes reported in the literature. In addition, the hybrid membrane demonstrated outstanding antifouling performance (flux recovery ratio of 92.68 % for Methyl blue and 90.31 % for Congo red), and high stability under acidic and alkaline conditions. Characterization results and mechanism analysis indicate that the Mg–Al LDH nanoparticles not only improved the membrane's hydrophilicity and modulated its structure, but also played a structural bridging role within the membrane to anchor chitosan through hydrogen bonding. Mechanistic studies confirm that the size-sieving and Donnan effects were responsible for the separation of dyes and salts. This study unveils the structural bridging role of Mg–Al LDH within the membrane and provides new insights into the facile fabrication of hybrid membranes for efficient textile wastewater remediation. – Name: Format Label: File Description Group: SrcInfo Data: electronic – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="https://research.chalmers.se/publication/549368" linkWindow="_blank">https://research.chalmers.se/publication/549368</link><br /><link linkTarget="URL" linkTerm="https://research.chalmers.se/publication/549368/file/549368_Fulltext.pdf" linkWindow="_blank">https://research.chalmers.se/publication/549368/file/549368_Fulltext.pdf</link> |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.memsci.2025.124914 Languages: – Text: English Subjects: – SubjectFull: Textile wastewater Type: general – SubjectFull: Hierarchical membrane Type: general – SubjectFull: Chitosan Type: general – SubjectFull: Structural bridging role Type: general – SubjectFull: Layered double hydroxides Type: general Titles: – TitleFull: Facile fabrication of hierarchical PVDF/Mg–Al LDH/chitosan membrane for textile wastewater remediation: role of LDH in anchoring chitosan Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xue, Yongtao – PersonEntity: Name: NameFull: Shao, Jieling – PersonEntity: Name: NameFull: Lê, Xuân Huy – PersonEntity: Name: NameFull: Chew, Jia Wei IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 18733123 – Type: issn-print Value: 03767388 – Type: issn-locals Value: SWEPUB_FREE – Type: issn-locals Value: CTH_SWEPUB Numbering: – Type: volume Value: 739 Titles: – TitleFull: Journal of Membrane Science Type: main |
| ResultId | 1 |