Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium Removal
In this study, a copper ferrocyanide/silica/polyvinylidene fluoride (CuFC/SiO2/PVDF) hollow-fiber composite membrane was successfully synthesized through a facile and effective crosslinking strategy. The PVDF hollow-fiber membrane with embedded SiO2 was used to fix the dispersion of CuFC nanoparticl...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-10-01
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| Series: | Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095809919307945 |
| _version_ | 1818228862493917184 |
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| author | Shiyuan Ding Lilan Zhang Yang Li Li’an Hou |
| author_facet | Shiyuan Ding Lilan Zhang Yang Li Li’an Hou |
| author_sort | Shiyuan Ding |
| collection | DOAJ |
| description | In this study, a copper ferrocyanide/silica/polyvinylidene fluoride (CuFC/SiO2/PVDF) hollow-fiber composite membrane was successfully synthesized through a facile and effective crosslinking strategy. The PVDF hollow-fiber membrane with embedded SiO2 was used to fix the dispersion of CuFC nanoparticles for cesium (Cs) removal. The surface morphology and chemical composition of the composite membrane were analyzed using scanning electron microscopy and X-ray photoelectron spectroscopy (XPS). The composite membrane showed a high Cs rejection rate and membrane flux at the three layers of CuFC and 0.5% SiO2, and its Cs rejection rate was not affected by variation in the pH (pH = 4–10). The modified membrane could be effectively regenerated many times using ammonium nitrate (NH4NO3). The Cs selectivity performance was verified by an efficient Cs rejection rate (76.25% and 88.67% in 8 h) in a solution of 100 μg·L−1 of Cs with 1 mmol·L−1 of competing cations (K+ and Na+). The CuFC/SiO2/PVDF hollow-fiber composite membrane showed a particularly superior removal performance (greater than 90%) in natural surface water and simulated water with a low Cs concentration. Therefore, the CuFC/SiO2/PVDF hollow-fiber composite membrane can be used directly in engineering applications for the remediation of radioactive Cs-contaminated water. Keywords: Cesium removal, Composite membrane, Copper ferrocyanide, Polyvinylidene fluoride |
| first_indexed | 2024-12-12T10:09:27Z |
| format | Article |
| id | doaj.art-7b3a6813545f4746bd88fa39cffb7125 |
| institution | Directory Open Access Journal |
| issn | 2095-8099 |
| language | English |
| last_indexed | 2024-12-12T10:09:27Z |
| publishDate | 2019-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Engineering |
| spelling | doaj.art-7b3a6813545f4746bd88fa39cffb71252022-12-22T00:27:50ZengElsevierEngineering2095-80992019-10-0155865871Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium RemovalShiyuan Ding0Lilan Zhang1Yang Li2Li’an Hou3Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China; Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim, Tianjin University, Tianjin 300072, China; Corresponding authors.State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, ChinaState Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China; Xi’an High-Tech Institute, Xi’an 710025, China; Corresponding authors.In this study, a copper ferrocyanide/silica/polyvinylidene fluoride (CuFC/SiO2/PVDF) hollow-fiber composite membrane was successfully synthesized through a facile and effective crosslinking strategy. The PVDF hollow-fiber membrane with embedded SiO2 was used to fix the dispersion of CuFC nanoparticles for cesium (Cs) removal. The surface morphology and chemical composition of the composite membrane were analyzed using scanning electron microscopy and X-ray photoelectron spectroscopy (XPS). The composite membrane showed a high Cs rejection rate and membrane flux at the three layers of CuFC and 0.5% SiO2, and its Cs rejection rate was not affected by variation in the pH (pH = 4–10). The modified membrane could be effectively regenerated many times using ammonium nitrate (NH4NO3). The Cs selectivity performance was verified by an efficient Cs rejection rate (76.25% and 88.67% in 8 h) in a solution of 100 μg·L−1 of Cs with 1 mmol·L−1 of competing cations (K+ and Na+). The CuFC/SiO2/PVDF hollow-fiber composite membrane showed a particularly superior removal performance (greater than 90%) in natural surface water and simulated water with a low Cs concentration. Therefore, the CuFC/SiO2/PVDF hollow-fiber composite membrane can be used directly in engineering applications for the remediation of radioactive Cs-contaminated water. Keywords: Cesium removal, Composite membrane, Copper ferrocyanide, Polyvinylidene fluoridehttp://www.sciencedirect.com/science/article/pii/S2095809919307945 |
| spellingShingle | Shiyuan Ding Lilan Zhang Yang Li Li’an Hou Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium Removal Engineering |
| title | Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium Removal |
| title_full | Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium Removal |
| title_fullStr | Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium Removal |
| title_full_unstemmed | Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium Removal |
| title_short | Engineering a High-Selectivity PVDF Hollow-Fiber Membrane for Cesium Removal |
| title_sort | engineering a high selectivity pvdf hollow fiber membrane for cesium removal |
| url | http://www.sciencedirect.com/science/article/pii/S2095809919307945 |
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