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Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures

Farah Ejaz Ahmed, Raed Hashaikeh, Nidal Hilal

Desalination, Volume: 470, Start page: 114118

Swansea University Author: Nidal Hilal

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DOI (Published version): 10.1016/j.desal.2019.114118

Abstract

A conductive form of networked cellulose, prepared by incorporating carbon nanotubes, has been used in polyvinyl alcohol (PVA) membranes for reverse osmosis. The use of networked cellulose and carbon nanostructures (CNS) not only helps control the thermal, mechanical and electrical properties of the...

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Published in: Desalination
ISSN: 0011-9164
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51482
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first_indexed 2019-08-21T15:33:40Z
last_indexed 2019-09-03T14:51:45Z
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spelling 2019-09-03T09:50:13.4661690 v2 51482 2019-08-19 Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures 3acba771241d878c8e35ff464aec0342 Nidal Hilal Nidal Hilal true false 2019-08-19 FGSEN A conductive form of networked cellulose, prepared by incorporating carbon nanotubes, has been used in polyvinyl alcohol (PVA) membranes for reverse osmosis. The use of networked cellulose and carbon nanostructures (CNS) not only helps control the thermal, mechanical and electrical properties of the membrane, but also enhances RO performance and allows the membrane surface to be cleaned electrolytically. High surface area multi-walled CNTs become trapped in the structure of networked cellulose. The modified material has greater tensile strength and elastic modulus, indicating an improvement in the mechanical properties of the membrane. Membranes with CNS demonstrate enhanced electrocatalytic activity when tested for hydrogen evolution in an acidic medium. The membranes are successfully applied to reverse osmosis using a feed of 25000 ppm NaCl, where the membranes with 7 wt. % CNS exhibited a 93% increase in flux compared to PVA-NC with no CNS, due to the nanotubes disrupting the compression of polymer chains under pressure. The membrane surface was recovered after fouling via electrolytic cleaning where the membrane was used as the cathode and a potential of -5V was applied for 20 minutes. All membranes retained a high salt rejection above 99.8%. Journal Article Desalination 470 114118 0011-9164 reverse osmosis, carbon nanotubes, cellulose, electrically conductive membrane 15 11 2019 2019-11-15 10.1016/j.desal.2019.114118 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2019-09-03T09:50:13.4661690 2019-08-19T15:32:09.4602622 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Farah Ejaz Ahmed 1 Raed Hashaikeh 2 Nidal Hilal 3 0051482-03092019094946.pdf ahmed2019(2).pdf 2019-09-03T09:49:46.6370000 Output 1251249 application/pdf Accepted Manuscript true 2020-08-31T00:00:00.0000000 true eng
title Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures
spellingShingle Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures
Nidal Hilal
title_short Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures
title_full Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures
title_fullStr Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures
title_full_unstemmed Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures
title_sort Fouling control in reverse osmosis membranes through modification with conductive carbon nanostructures
author_id_str_mv 3acba771241d878c8e35ff464aec0342
author_id_fullname_str_mv 3acba771241d878c8e35ff464aec0342_***_Nidal Hilal
author Nidal Hilal
author2 Farah Ejaz Ahmed
Raed Hashaikeh
Nidal Hilal
format Journal article
container_title Desalination
container_volume 470
container_start_page 114118
publishDate 2019
institution Swansea University
issn 0011-9164
doi_str_mv 10.1016/j.desal.2019.114118
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description A conductive form of networked cellulose, prepared by incorporating carbon nanotubes, has been used in polyvinyl alcohol (PVA) membranes for reverse osmosis. The use of networked cellulose and carbon nanostructures (CNS) not only helps control the thermal, mechanical and electrical properties of the membrane, but also enhances RO performance and allows the membrane surface to be cleaned electrolytically. High surface area multi-walled CNTs become trapped in the structure of networked cellulose. The modified material has greater tensile strength and elastic modulus, indicating an improvement in the mechanical properties of the membrane. Membranes with CNS demonstrate enhanced electrocatalytic activity when tested for hydrogen evolution in an acidic medium. The membranes are successfully applied to reverse osmosis using a feed of 25000 ppm NaCl, where the membranes with 7 wt. % CNS exhibited a 93% increase in flux compared to PVA-NC with no CNS, due to the nanotubes disrupting the compression of polymer chains under pressure. The membrane surface was recovered after fouling via electrolytic cleaning where the membrane was used as the cathode and a potential of -5V was applied for 20 minutes. All membranes retained a high salt rejection above 99.8%.
published_date 2019-11-15T04:03:22Z
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score 11.035634

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