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oai:docta.ucm.es:20.500.14352/1294992025-12-20T00:57:54Zcom_20.500.14352_14col_20.500.14352_15

Gamma-irradiated janus electrospun nanofiber membranes for desalination and nuclear wastewater treatment Essalhi, Mohamed Afsar, Noor Ul Bouyer, Denis Sundman, Ola Holmboe, Michael Khayet Souhaimi, Mohamed Jonsson, Mats Tavajohi, Naser 66.049 628.165 Double-layer electrospun nanofibrous Membranes Hydrophobic / hydrophilic Desalination Membrane distillation Simulated nuclear wastewater treatment Nuclides decontamination Ciencias 33 Ciencias Tecnológicas © 2024 The Authors. 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 mu m. 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/m(2)h and 73.27 kg/m(2)h in the DCMD using aqueous feed solutions of NaCl and NaNO3, respectively, and 70.80 kg/m(2)h and 41.96 kg/m(2)h 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. Kempe Foundation Depto. de Estructura de la Materia, Física Térmica y Electrónica Fac. de Ciencias Físicas TRUE pub 2025-12-19T18:57:57Z 2025-12-19T18:57:57Z 2024-05 journal article VoR https://hdl.handle.net/20.500.14352/129499 0376-7388 10.1016/j.memsci.2024.122726 eng JCK22-0008 Essalhi, M., Afsar, N. U., Bouyer, D., Sundman, O., Holmboe, M., Khayet, M., ... & Tavajohi, N. (2024). Gamma-irradiated janus electrospun nanofiber membranes for desalination and nuclear wastewater treatment. Journal of Membrane Science, 700, 122726. Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ open access application/pdf application/pdf Elsevier