Removal of PFAS from complex matrix water by filtration with supported graphene oxide membranes
Polyfluoroalkyl substances (PFAS) in water represent a major health and environmental risk with long-lasting mpacts. In this study, the potential of graphene oxide (GO) membranes modified through different routes for the removal of perfluorooctanoic acid (PFOA) from water was evaluated, with the aim...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/738900 |
| Acceso en línea: | https://hdl.handle.net/10486/738900 https://dx.doi.org/10.1016/j.jece.2025.120225 |
| Access Level: | acceso abierto |
| Palabra clave: | Per- and polyfluoroalkyl substances (PFAS) PFOA removal Organic fouling GO membranes Nanofiltration Química |
| Sumario: | Polyfluoroalkyl substances (PFAS) in water represent a major health and environmental risk with long-lasting mpacts. In this study, the potential of graphene oxide (GO) membranes modified through different routes for the removal of perfluorooctanoic acid (PFOA) from water was evaluated, with the aim of enhancing drinking water purification and reclaimed water applications. Membranes prepared from suspensions with lower GO concentrations exhibited higher rejection, despite having slightly larger interlayer spacing. Increasing the GO loading and membrane thickness progressively reduced permeability but simultaneously improved rejection, reaching values of up to 95 %. UV-induced reduction of GO membranes enhanced permeability while maintaining high PFOA rejection rates. The introduction of amine groups into the GO membrane generated a positive surface charge, enhancing the interaction with PFOA molecules and leading to slightly lower rejection but improved permeability. The presence of salts in the water matrix contributed to PFOA rejection, likely through ionic interactions that modulated membrane selectivity. Humic acids did not significantly affect PFOA rejection; however, they reduced permeability, although this effect was less pronounced for membranes modified with methylamine. Long-term experiments revealed a decline in PFOA rejection over filtration time, particularly in the presence of salts, with the most significant decrease occurring during the first two hours. These results highlight the crucial role of water matrix composition in determining long-term membrane performance |
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