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Gamma-irradiated janus electrospun nanofiber membranes for desalination and nuclear wastewater treatment
Umeå University, Faculty of Science and Technology, Department of Chemistry. African Sustainable Agriculture Research Institute (ASARI), Mohammed VI Polytechnic University (UM6P), Laayoune, 70000, Morocco.ORCID iD: 0000-0003-4535-2395
Umeå University, Faculty of Science and Technology, Department of Chemistry.
Institut Européen des Membranes, IEM, UMR 5635, ENSCM, CNRS, Univ Montpellier, Montpellier, France .
Umeå University, Faculty of Science and Technology, Department of Chemistry.ORCID iD: 0000-0002-1705-5249
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2024 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 700, article id 122726Article in journal (Refereed) Published
Abstract [en]

This study presents the fabrication of double-layer electrospun nanofibrous membranes (DL-ENMs) using polyvinylidene fluoride (PVDF) and polyether sulfone (PES) based polymers with different degrees of hydrophilicity (PES, sulfonated PES, and PES with hydroxyl terminals). A comparative analysis was carried out with single-layer electrospun nanofiber membranes (SL-ENM) with a total thickness of about 375 μm. Using feed solutions, including sodium chloride, sodium nitrate, and simulated nuclear wastewater (SNWW), the performance of DL-ENMs was evaluated for desalination and radionuclide decontamination by direct contact membrane distillation (DCMD) and air gap membrane distillation (AGMD) techniques. The results showed that DL-ENMs, especially those incorporating a sulfonated PES-based hydrophilic layer, exhibited superior permeate fluxes, reaching values of 72.72 kg/m2h and 73.27 kg/m2h in the DCMD using aqueous feed solutions of NaCl and NaNO3, respectively, and 70.80 kg/m2h and 41.96 kg/m2h using aqueous feed solutions of SNWW in DCMD and AGMD, respectively. Both SL-ENMs and DL-ENMs exhibited high rejection efficiencies and decontamination factors for the feed solutions (>99.9%). In addition, the prepared ENMs were exposed to gamma radiation to evaluate their applicability in real-life applications. The result of irradiation revealed the negative impact of gamma radiation on the fluorine content of PVDF which could be a critical point in using PVDF as a hydrophobic material for decontaminating nuclear wastewater by membrane distillation.

Place, publisher, year, edition, pages
Elsevier, 2024. Vol. 700, article id 122726
Keywords [en]
Double-layer electrospun nanofibrous membranes, Hydrophobic/hydrophilic, Desalination, Membrane distillation, Simulated nuclear wastewater treatment, Nuclides decontamination
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-222963DOI: 10.1016/j.memsci.2024.122726Scopus ID: 2-s2.0-85189556606OAI: oai:DiVA.org:umu-222963DiVA, id: diva2:1848629
Available from: 2024-04-04 Created: 2024-04-04 Last updated: 2024-04-15Bibliographically approved

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Essalhi, MohamedAfsar, Noor UlSundman, OlaHolmboe, MichaelTavajohi, Naser

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