Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization
The critical challenges of using electromembrane processes [e.g., electrodialysis and flow-electrode capacitive deionization (FCDI)] to recycle resources (e.g., water, salts, and organic compounds) from wastewater are the fractionation of dissolved ionic matter, the removal/recovery of organic compo...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/163457 |
| _version_ | 1826128465297932288 |
|---|---|
| author | Tang, Kexin Zheng, Han Du, Penghui Zhou, Kun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Tang, Kexin Zheng, Han Du, Penghui Zhou, Kun |
| author_sort | Tang, Kexin |
| collection | NTU |
| description | The critical challenges of using electromembrane processes [e.g., electrodialysis and flow-electrode capacitive deionization (FCDI)] to recycle resources (e.g., water, salts, and organic compounds) from wastewater are the fractionation of dissolved ionic matter, the removal/recovery of organic components during desalination, and membrane antifouling. This study realized the simultaneous fractionation, desalination, and dye removal/recovery (FDR) treatment of dye/salt mixtures through a simple but effective approach, that is, using a carbon cloth-modified FCDI (CC-FCDI) unit, in which the carbon cloth layer was attached to the surface of each ion-exchange membrane (IEM). The IEMs and carbon-based flow-electrodes were responsible for the fractionation and desalination of dye and salt ions, while the carbon cloth layers contributed to the active membrane antifouling and dye removal/recovery by the electrosorption mechanism. Attributed to such features, the CC-FCDI unit accomplished the effective FDR treatment of dye/salt mixtures with wide ranges of salt and dye concentrations (5-20 g L-1 NaCl and 200-800 ppm methylene blue) and different dye components (cationic and anionic dyes) under various applied voltages (1.2-3.2 V). Moreover, the active membrane antifouling by virtue of the carbon cloth facilitated the excellent and sustainable FDR performance of CC-FCDI. The removal/recovery of dyes from the carbon cloth strongly depends on the characteristics of dye molecules, the surface properties of the carbon cloth, and the local pH at the IEM/CC interfaces. This study sheds light on the strategies of using multifunctional layer-modified FCDI units to reclaim resources from various high-salinity organic wastewater. |
| first_indexed | 2024-10-01T07:25:24Z |
| format | Journal Article |
| id | ntu-10356/163457 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:25:24Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1634572022-12-07T02:02:07Z Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization Tang, Kexin Zheng, Han Du, Penghui Zhou, Kun School of Mechanical and Aerospace Engineering Interdisciplinary Graduate School (IGS) Nanyang Environment and Water Research Institute Environmental Process Modelling Centre Singapore Centre for 3D Printing Engineering::Environmental engineering Ion-Exchange Membranes Mixtures The critical challenges of using electromembrane processes [e.g., electrodialysis and flow-electrode capacitive deionization (FCDI)] to recycle resources (e.g., water, salts, and organic compounds) from wastewater are the fractionation of dissolved ionic matter, the removal/recovery of organic components during desalination, and membrane antifouling. This study realized the simultaneous fractionation, desalination, and dye removal/recovery (FDR) treatment of dye/salt mixtures through a simple but effective approach, that is, using a carbon cloth-modified FCDI (CC-FCDI) unit, in which the carbon cloth layer was attached to the surface of each ion-exchange membrane (IEM). The IEMs and carbon-based flow-electrodes were responsible for the fractionation and desalination of dye and salt ions, while the carbon cloth layers contributed to the active membrane antifouling and dye removal/recovery by the electrosorption mechanism. Attributed to such features, the CC-FCDI unit accomplished the effective FDR treatment of dye/salt mixtures with wide ranges of salt and dye concentrations (5-20 g L-1 NaCl and 200-800 ppm methylene blue) and different dye components (cationic and anionic dyes) under various applied voltages (1.2-3.2 V). Moreover, the active membrane antifouling by virtue of the carbon cloth facilitated the excellent and sustainable FDR performance of CC-FCDI. The removal/recovery of dyes from the carbon cloth strongly depends on the characteristics of dye molecules, the surface properties of the carbon cloth, and the local pH at the IEM/CC interfaces. This study sheds light on the strategies of using multifunctional layer-modified FCDI units to reclaim resources from various high-salinity organic wastewater. Nanyang Technological University The authors would like to thank the financial support from the Nanyang Environment and Water Research Institute (Core Funding), Nanyang Technological University, Singapore. 2022-12-07T02:02:06Z 2022-12-07T02:02:06Z 2022 Journal Article Tang, K., Zheng, H., Du, P. & Zhou, K. (2022). Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization. Environmental Science and Technology, 56(12), 8885-8896. https://dx.doi.org/10.1021/acs.est.2c00982 0013-936X https://hdl.handle.net/10356/163457 10.1021/acs.est.2c00982 35658453 2-s2.0-85133207280 12 56 8885 8896 en Environmental Science and Technology © 2022 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Ion-Exchange Membranes Mixtures Tang, Kexin Zheng, Han Du, Penghui Zhou, Kun Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization |
| title | Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization |
| title_full | Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization |
| title_fullStr | Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization |
| title_full_unstemmed | Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization |
| title_short | Simultaneous fractionation, desalination, and dye removal of dye/salt mixtures by carbon cloth-modified flow-electrode capacitive deionization |
| title_sort | simultaneous fractionation desalination and dye removal of dye salt mixtures by carbon cloth modified flow electrode capacitive deionization |
| topic | Engineering::Environmental engineering Ion-Exchange Membranes Mixtures |
| url | https://hdl.handle.net/10356/163457 |
| work_keys_str_mv | AT tangkexin simultaneousfractionationdesalinationanddyeremovalofdyesaltmixturesbycarbonclothmodifiedflowelectrodecapacitivedeionization AT zhenghan simultaneousfractionationdesalinationanddyeremovalofdyesaltmixturesbycarbonclothmodifiedflowelectrodecapacitivedeionization AT dupenghui simultaneousfractionationdesalinationanddyeremovalofdyesaltmixturesbycarbonclothmodifiedflowelectrodecapacitivedeionization AT zhoukun simultaneousfractionationdesalinationanddyeremovalofdyesaltmixturesbycarbonclothmodifiedflowelectrodecapacitivedeionization |