Gamma-irradiated janus electrospun nanofiber membranes for desalination and nuclear wastewater treatment
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...
| Autores: | ; ; ; ; ; ; ; |
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| Tipo de documento: | Artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/129499 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/129499 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | 66.049 628.165 Double-layer electrospun nanofibrous Membranes Hydrophobic / hydrophilic Desalination Membrane distillation Simulated nuclear wastewater treatment Nuclides decontamination Ciencias 33 Ciencias Tecnológicas |
| Sumario: | 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. |
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