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Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes

Jono Suhartono, Chedly Tizaoui Orcid Logo

Ozone: Science & Engineering, Volume: 40, Pages: 64 - 75

Swansea University Author: Chedly Tizaoui Orcid Logo

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DOI (Published version): 10.1080/01919512.2017.1345618

Abstract

This research demonstrates for the first time that ozone is an effective cleaning agent for polyvinylidene fluoride (PVDF) membranes fouled by natural organic matter (NOM). Bare PVDF membranes as well as PVDF impregnated with CNTs (pristine (CNTs–P) and oxidized (CNTs–O)) at 0.3% mass membranes were...

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Published in: Ozone: Science & Engineering
ISSN: 0191-9512 1547-6545
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa34965
first_indexed 2017-08-22T12:55:58Z
last_indexed 2019-04-02T09:54:55Z
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spelling 2019-03-30T23:10:06.1379738 v2 34965 2017-08-22 Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes 4b34a0286d3c0b0b081518fa6987031d 0000-0003-2159-7881 Chedly Tizaoui Chedly Tizaoui true false 2017-08-22 EAAS This research demonstrates for the first time that ozone is an effective cleaning agent for polyvinylidene fluoride (PVDF) membranes fouled by natural organic matter (NOM). Bare PVDF membranes as well as PVDF impregnated with CNTs (pristine (CNTs–P) and oxidized (CNTs–O)) at 0.3% mass membranes were used. Three different methods were investigated for cleaning the fouled membranes including; A: 10-min cleaning by pure water, B: 5-min water followed by 5-min ozonated water, and C: 10-min fully ozonated water. It was found that the application of fully ozonated water for 10 min was very effective to reinstate the flux to almost its original value of unfouled membrane. The CNTs–P/PVDF membrane exhibited the highest fouling with a total fouling ratio of 81%, while for the bare PVDF and the CNTs–O/PVDF membranes, the fouling ratios were 76% and 74%, respectively. The full ozonated water cleaning method gave the highest removal of fouling leaving the lowest irreversible fouling on the membrane as compared to the other cleaning methods. On the other hand, the highest removal of NOM fouling was obtained for CNTs–O/PVDF membranes indicating that fouling on CNTs–O/PVDF membrane was less bound than the other membranes. Contact angle measurements of the fouled membranes showed that all membranes exhibited increased contact angles due to the NOM deposition but after cleaning, particularly with ozonated water, the membrane contact angles returned to almost their original values. FTIR analysis of the membranes corroborated the results obtained. Journal Article Ozone: Science & Engineering 40 64 75 0191-9512 1547-6545 Ozone, Carbon Nanotubes, Membrane Cleaning, Membrane Fouling, PVDF Membrane 31 12 2018 2018-12-31 10.1080/01919512.2017.1345618 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2019-03-30T23:10:06.1379738 2017-08-22T10:06:28.5703567 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Jono Suhartono 1 Chedly Tizaoui 0000-0003-2159-7881 2 0034965-24082017122220.pdf suhartono2017.pdf 2017-08-24T12:22:20.7330000 Output 475090 application/pdf Accepted Manuscript true 2018-06-29T00:00:00.0000000 true eng
title Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes
spellingShingle Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes
Chedly Tizaoui
title_short Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes
title_full Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes
title_fullStr Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes
title_full_unstemmed Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes
title_sort Ozone Cleaning of Fouled Poly(Vinylidene) Fluoride/Carbon Nanotube Membranes
author_id_str_mv 4b34a0286d3c0b0b081518fa6987031d
author_id_fullname_str_mv 4b34a0286d3c0b0b081518fa6987031d_***_Chedly Tizaoui
author Chedly Tizaoui
author2 Jono Suhartono
Chedly Tizaoui
format Journal article
container_title Ozone: Science & Engineering
container_volume 40
container_start_page 64
publishDate 2018
institution Swansea University
issn 0191-9512
1547-6545
doi_str_mv 10.1080/01919512.2017.1345618
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 - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description This research demonstrates for the first time that ozone is an effective cleaning agent for polyvinylidene fluoride (PVDF) membranes fouled by natural organic matter (NOM). Bare PVDF membranes as well as PVDF impregnated with CNTs (pristine (CNTs–P) and oxidized (CNTs–O)) at 0.3% mass membranes were used. Three different methods were investigated for cleaning the fouled membranes including; A: 10-min cleaning by pure water, B: 5-min water followed by 5-min ozonated water, and C: 10-min fully ozonated water. It was found that the application of fully ozonated water for 10 min was very effective to reinstate the flux to almost its original value of unfouled membrane. The CNTs–P/PVDF membrane exhibited the highest fouling with a total fouling ratio of 81%, while for the bare PVDF and the CNTs–O/PVDF membranes, the fouling ratios were 76% and 74%, respectively. The full ozonated water cleaning method gave the highest removal of fouling leaving the lowest irreversible fouling on the membrane as compared to the other cleaning methods. On the other hand, the highest removal of NOM fouling was obtained for CNTs–O/PVDF membranes indicating that fouling on CNTs–O/PVDF membrane was less bound than the other membranes. Contact angle measurements of the fouled membranes showed that all membranes exhibited increased contact angles due to the NOM deposition but after cleaning, particularly with ozonated water, the membrane contact angles returned to almost their original values. FTIR analysis of the membranes corroborated the results obtained.
published_date 2018-12-31T04:22:50Z
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score 11.293348

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