Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt Separation
The escalating discharge of textile wastewater with plenty of dye and salt has resulted in serious environmental risks. Membranes assembled from two-dimensional (2D) nanomaterials with many tunable interlayer spacings are promising materials for dye/salt separation. However, the narrow layer spacing...
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| Format: | Article |
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MDPI AG
2025-01-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/15/1/25 |
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| author | Yixuan Fu Shuai Wang Huiquan Liu Ke Zhang Lunxiang Zhang Yongchen Song Zheng Ling |
| author_facet | Yixuan Fu Shuai Wang Huiquan Liu Ke Zhang Lunxiang Zhang Yongchen Song Zheng Ling |
| author_sort | Yixuan Fu |
| collection | DOAJ |
| description | The escalating discharge of textile wastewater with plenty of dye and salt has resulted in serious environmental risks. Membranes assembled from two-dimensional (2D) nanomaterials with many tunable interlayer spacings are promising materials for dye/salt separation. However, the narrow layer spacing and tortuous interlayer transport channels of 2D-material-based membranes limit the processing capacity and the permeability of small salt ions for efficient dye/salt separation. In this work, a novel sepiolite/vermiculite membrane was fabricated using Meyer rod-coating and naturally occurring clay. The intercalation of sepiolite Nanofibers between vermiculite Nanosheets provides additional transport nanochannels and forms looser permeable networks, producing composite membranes with remarkably enhanced flux. As a result, the optimized membranes with 80% sepiolite exhibit remarkable flux as high as 78.12 LMH bar<sup>−1</sup>, outstanding dye rejection (Congo Red~98.26%), and excellent selectivity of dye/salt of 10.41. In addition, this novel all-clay composite membrane demonstrates stable separation performance under acidity, alkalinity and prolonged operation conditions. The large-scale sepiolite/vermiculite membranes made by the simple proposed method using low-cost materials provide new strategies for efficient and environmentally-friendly dye/salt separation. |
| format | Article |
| id | doaj-art-ae2fe94e29294a998995f0194e2c0aa4 |
| institution | Kabale University |
| issn | 2077-0375 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj-art-ae2fe94e29294a998995f0194e2c0aa42025-01-24T13:41:04ZengMDPI AGMembranes2077-03752025-01-011512510.3390/membranes15010025Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt SeparationYixuan Fu0Shuai Wang1Huiquan Liu2Ke Zhang3Lunxiang Zhang4Yongchen Song5Zheng Ling6Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, ChinaThe escalating discharge of textile wastewater with plenty of dye and salt has resulted in serious environmental risks. Membranes assembled from two-dimensional (2D) nanomaterials with many tunable interlayer spacings are promising materials for dye/salt separation. However, the narrow layer spacing and tortuous interlayer transport channels of 2D-material-based membranes limit the processing capacity and the permeability of small salt ions for efficient dye/salt separation. In this work, a novel sepiolite/vermiculite membrane was fabricated using Meyer rod-coating and naturally occurring clay. The intercalation of sepiolite Nanofibers between vermiculite Nanosheets provides additional transport nanochannels and forms looser permeable networks, producing composite membranes with remarkably enhanced flux. As a result, the optimized membranes with 80% sepiolite exhibit remarkable flux as high as 78.12 LMH bar<sup>−1</sup>, outstanding dye rejection (Congo Red~98.26%), and excellent selectivity of dye/salt of 10.41. In addition, this novel all-clay composite membrane demonstrates stable separation performance under acidity, alkalinity and prolonged operation conditions. The large-scale sepiolite/vermiculite membranes made by the simple proposed method using low-cost materials provide new strategies for efficient and environmentally-friendly dye/salt separation.https://www.mdpi.com/2077-0375/15/1/25two-dimensional nanomaterialsall-clay membranesassembled membranes from 2D nanomaterialsdye/salt separationvermiculite |
| spellingShingle | Yixuan Fu Shuai Wang Huiquan Liu Ke Zhang Lunxiang Zhang Yongchen Song Zheng Ling Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt Separation Membranes two-dimensional nanomaterials all-clay membranes assembled membranes from 2D nanomaterials dye/salt separation vermiculite |
| title | Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt Separation |
| title_full | Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt Separation |
| title_fullStr | Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt Separation |
| title_full_unstemmed | Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt Separation |
| title_short | Large-Area Clay Composite Membranes with Enhanced Permeability for Efficient Dye/Salt Separation |
| title_sort | large area clay composite membranes with enhanced permeability for efficient dye salt separation |
| topic | two-dimensional nanomaterials all-clay membranes assembled membranes from 2D nanomaterials dye/salt separation vermiculite |
| url | https://www.mdpi.com/2077-0375/15/1/25 |
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