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Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation
Farah Ahmed,
Nidal Hilal,
Raed Hashaikeh
Journal of Membrane Science, Volume: 556, Pages: 66 - 72
Swansea University Author: Nidal Hilal
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DOI (Published version): 10.1016/j.memsci.2018.03.069
Abstract
Online monitoring of fouling in desalination processes enables early and appropriate action for fouling control. This study demonstrates the use of Electrochemical Impedance Spectroscopy (EIS) to electrically conductive membranes for online monitoring of fouling by eliminating the need for external...
| Published in: | Journal of Membrane Science |
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| ISSN: | 0376-7388 |
| Published: |
2018
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa39192 |
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2021-01-14T12:58:52.5930443 v2 39192 2018-03-24 Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation 3acba771241d878c8e35ff464aec0342 Nidal Hilal Nidal Hilal true false 2018-03-24 FGSEN Online monitoring of fouling in desalination processes enables early and appropriate action for fouling control. This study demonstrates the use of Electrochemical Impedance Spectroscopy (EIS) to electrically conductive membranes for online monitoring of fouling by eliminating the need for external electrodes and/or canary cells. Electrically conductive membranes are prepared by incorporation of silica in carbon nanostructures and subsequent fluorination to yield hydrophobic membranes. These membranes are applied to direct contact membrane distillation with 99.9% salt rejection and a flux of 4.3 LMH. EIS is used for online monitoring of inorganic fouling on the membrane surface during the MD process. Impedance spectra taken over a duration of 15 hours indicated that impedance in the low frequency (<100 Hz) region gradually decreased with fouling early on, and increased towards the end. Impedance-based monitoring is more sensitive to changes in the system than monitoring of flux and permeate conductivity. It shows the capability of EIS as a sensitive online monitoring tool for fouling in MD. Journal Article Journal of Membrane Science 556 66 72 0376-7388 15 6 2018 2018-06-15 10.1016/j.memsci.2018.03.069 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2021-01-14T12:58:52.5930443 2018-03-24T14:15:51.5548238 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Farah Ahmed 1 Nidal Hilal 2 Raed Hashaikeh 3 0039192-25032018192422.pdf Paperv11.pdf 2018-03-25T19:24:22.3070000 Output 1350120 application/pdf Accepted Manuscript true 2019-03-31T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng |
| title |
Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation |
| spellingShingle |
Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation Nidal Hilal |
| title_short |
Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation |
| title_full |
Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation |
| title_fullStr |
Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation |
| title_full_unstemmed |
Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation |
| title_sort |
Electrically conductive membranes for in situ fouling detection using impedance spectroscopy in membrane distillation |
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3acba771241d878c8e35ff464aec0342 |
| author_id_fullname_str_mv |
3acba771241d878c8e35ff464aec0342_***_Nidal Hilal |
| author |
Nidal Hilal |
| author2 |
Farah Ahmed Nidal Hilal Raed Hashaikeh |
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Journal article |
| container_title |
Journal of Membrane Science |
| container_volume |
556 |
| container_start_page |
66 |
| publishDate |
2018 |
| institution |
Swansea University |
| issn |
0376-7388 |
| doi_str_mv |
10.1016/j.memsci.2018.03.069 |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised |
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| description |
Online monitoring of fouling in desalination processes enables early and appropriate action for fouling control. This study demonstrates the use of Electrochemical Impedance Spectroscopy (EIS) to electrically conductive membranes for online monitoring of fouling by eliminating the need for external electrodes and/or canary cells. Electrically conductive membranes are prepared by incorporation of silica in carbon nanostructures and subsequent fluorination to yield hydrophobic membranes. These membranes are applied to direct contact membrane distillation with 99.9% salt rejection and a flux of 4.3 LMH. EIS is used for online monitoring of inorganic fouling on the membrane surface during the MD process. Impedance spectra taken over a duration of 15 hours indicated that impedance in the low frequency (<100 Hz) region gradually decreased with fouling early on, and increased towards the end. Impedance-based monitoring is more sensitive to changes in the system than monitoring of flux and permeate conductivity. It shows the capability of EIS as a sensitive online monitoring tool for fouling in MD. |
| published_date |
2018-06-15T03:49:46Z |
| _version_ |
1763752423026851840 |
| score |
11.037166 |