Ultrahigh Water Permeance of Reduced Graphene Oxide Membrane for Radioactive Liquid Waste Treatment
Membrane methods exhibit great potential for application in radioactive liquid waste treatment. In this work, we prepared a reduced graphene oxide using the amino-hydrothermal method (AH-rGO) that exhibited effective rejection rates of 99.9% for CoCl<sub>2</sub>, ZnCl<sub>2</sub...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/dd58438e17c04b648d553426b13e0c49 |
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| Sumario: | Membrane methods exhibit great potential for application in radioactive liquid waste treatment. In this work, we prepared a reduced graphene oxide using the amino-hydrothermal method (AH-rGO) that exhibited effective rejection rates of 99.9% for CoCl<sub>2</sub>, ZnCl<sub>2</sub>, NiCl<sub>2</sub>, and radionuclide <sup>60</sup>Co solutions with an ultrahigh water permeance of >71.9 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>. The thickness of the AH-rGO membranes affects the water permeance, as the membrane with a thickness of ≈250 nm has the highest water permeance of up to 125.1 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup> with the corresponding rejection rate of 86.8%. Importantly, this is the most permeable membrane with a satisfactory level of the rejection rate for typical radioactive ions of Co<sup>2+</sup>, Zn<sup>2+</sup>, and Ni<sup>2+</sup>. Moreover, the AH-rGO membranes presented excellent stability. These findings demonstrate the potential of reduced graphene oxide (rGO) membranes for radioactive liquid waste treatment. |
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