Ultrafiltration membranes modified with reduced graphene oxide: effect on methyl green removal from aqueous solution
In this work, three types of ultrafiltration membranes with different characteristics (GR60PP, RC70PP and GR80PP) have been tested for the removal of the dyemethyl green. The testswere first carried out with the three membranes without any modification and then with the membranes’ surfaces modified...
| Autores: | , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | España |
| Recursos: | Universidad Politécnica de Cartagena(UPCT) |
| Repositorio: | Repositorio Digital UPCT |
| OAI Identifier: | oai:repositorio.upct.es:10317/13042 |
| Acesso em linha: | http://hdl.handle.net/10317/13042 https://www.mdpi.com/2118614 |
| Access Level: | acceso abierto |
| Palavra-chave: | Methyl green Modified membranes Graphene oxide Reduced graphene oxide Ultrafiltration Ingeniería Química 3303 Ingeniería y Tecnología Químicas |
| Resumo: | In this work, three types of ultrafiltration membranes with different characteristics (GR60PP, RC70PP and GR80PP) have been tested for the removal of the dyemethyl green. The testswere first carried out with the three membranes without any modification and then with the membranes’ surfaces modified with reduced graphene oxide (rGO). The modification was achieved through physical treatment. The CR70PP membrane did not support the modification treatment and was discarded. The other membranes were initially characterized with distilled water tests to study the permeability to the solvent, and later, the permeate fluxes and the values of rejection coefficients were obtained at different working pressures with a fixed dye initial concentration. In addition, SEMimages and SEM-EDX spectra of the native and modified membranes were obtained before and after the dye tests. The GR60PP membrane has shown the best results in relation to the modification because it has increased its rejection levels. On the opposite, the GR80PPmembrane performs better without surfacemodification, achieving the highest rejection values and the highest permeate fluxes in its native form. |
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