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Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation

Hadi Attia, Daniel Johnson Orcid Logo, Chris J. Wright, Nidal Hilal, Christopher Wright Orcid Logo

Desalination, Volume: 439, Pages: 31 - 45

Swansea University Authors: Daniel Johnson Orcid Logo, Nidal Hilal, Christopher Wright Orcid Logo

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DOI (Published version): 10.1016/j.desal.2018.04.003

Abstract

A novel approach to enhance membrane performance using electrospinning fabrication technique for recovery of heavy metals using air-gap membrane distillation is described. Accordingly, a comprehensive study was accomplished to fabricate a unique electrospun dual-layer membrane (ESD) with an upper su...

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Published in: Desalination
ISSN: 0011-9164
Published: Elsevier 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39302
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Accordingly, a comprehensive study was accomplished to fabricate a unique electrospun dual-layer membrane (ESD) with an upper superhydrophobic layer and hydrophobic electrospun support layer and compare with a superhydrophobic electrospun single layer membrane (ESS). Superhydrophobic alumina nanoparticles (Al2O3) were embedded in a low polymer concentration of polyvinylidene fluoride (PVDF) to produce superhydrophobic ESS and top layer of ESD using electrospinning technique, while a mat with different concentrations of PVDF were used as hydrophobic electrospun support layer. In this study, dual layer membranes were fabricated in two sets. In the first set, layer thickness was varied by changing the spinning volume of the top and support layer with maintain total spinning volume, while in the second set the fibre diameter of the support layer was varied by changing the polymer concentration. Moreover, the electrospun membranes were characterized in terms of membrane performance such as: permeate flux, heavy metal rejection and energy consumption; wettability performance such as liquid entry pressure (LEP), and water contact angle (WCA) ; membrane structure such as mean with maximum pore size and porosity; membrane integrity such as mechanical and thermal integrity. The heavy metal rejection was &#x2C3; 99% for all single and dual layer membranes when filtering artificial wastewater (Pb, Cd, Cr, Cu, Ni). When compared with single layer electrospun membrane made from spinning 16 ml PVDF, dual layer membrane made from the same spinning volume exhibited some improvement, such as higher permeate flux above 23 Litre/m2.h (LMH) when filtering 2500 ppm concentration heavy metal feed water. Additionally, both sets of dual layer membrane demonstrated better mechanical performance and slight reduction of LEP compared with single layer electrospun membrane.</abstract><type>Journal Article</type><journal>Desalination</journal><volume>439</volume><paginationStart>31</paginationStart><paginationEnd>45</paginationEnd><publisher>Elsevier</publisher><issnPrint>0011-9164</issnPrint><keywords>Air gap membrane distillation; Dual layers; Superhydrophobic&#x2013;hydrophobic membrane; Heavy metal recovery; Membrane thickness</keywords><publishedDay>1</publishedDay><publishedMonth>8</publishedMonth><publishedYear>2018</publishedYear><publishedDate>2018-08-01</publishedDate><doi>10.1016/j.desal.2018.04.003</doi><url/><notes/><college>COLLEGE NANME</college><CollegeCode>COLLEGE CODE</CollegeCode><institution>Swansea University</institution><apcterm/><lastEdited>2018-05-21T12:24:10.9449108</lastEdited><Created>2018-04-03T17:18:45.2160673</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Engineering and Applied Sciences - Biomedical Engineering</level></path><authors><author><firstname>Hadi</firstname><surname>Attia</surname><order>1</order></author><author><firstname>Daniel</firstname><surname>Johnson</surname><orcid>0000-0001-6921-0389</orcid><order>2</order></author><author><firstname>Chris J.</firstname><surname>Wright</surname><order>3</order></author><author><firstname>Nidal</firstname><surname>Hilal</surname><order>4</order></author><author><firstname>Christopher</firstname><surname>Wright</surname><orcid>0000-0003-2375-8159</orcid><order>5</order></author></authors><documents><document><filename>0039302-12042018155116.pdf</filename><originalFilename>attia2018.pdf</originalFilename><uploaded>2018-04-12T15:51:16.4230000</uploaded><type>Output</type><contentLength>2614500</contentLength><contentType>application/pdf</contentType><version>Accepted Manuscript</version><cronfaStatus>true</cronfaStatus><embargoDate>2019-04-09T00:00:00.0000000</embargoDate><copyrightCorrect>true</copyrightCorrect><language>eng</language></document></documents><OutputDurs/></rfc1807>
spelling 2018-05-21T12:24:10.9449108 v2 39302 2018-04-03 Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation 4bdcc306062428d2715b0dd308cc092f 0000-0001-6921-0389 Daniel Johnson Daniel Johnson true false 3acba771241d878c8e35ff464aec0342 Nidal Hilal Nidal Hilal true false 235e125ac3463e2ee7fc98604bf879ce 0000-0003-2375-8159 Christopher Wright Christopher Wright true false 2018-04-03 A novel approach to enhance membrane performance using electrospinning fabrication technique for recovery of heavy metals using air-gap membrane distillation is described. Accordingly, a comprehensive study was accomplished to fabricate a unique electrospun dual-layer membrane (ESD) with an upper superhydrophobic layer and hydrophobic electrospun support layer and compare with a superhydrophobic electrospun single layer membrane (ESS). Superhydrophobic alumina nanoparticles (Al2O3) were embedded in a low polymer concentration of polyvinylidene fluoride (PVDF) to produce superhydrophobic ESS and top layer of ESD using electrospinning technique, while a mat with different concentrations of PVDF were used as hydrophobic electrospun support layer. In this study, dual layer membranes were fabricated in two sets. In the first set, layer thickness was varied by changing the spinning volume of the top and support layer with maintain total spinning volume, while in the second set the fibre diameter of the support layer was varied by changing the polymer concentration. Moreover, the electrospun membranes were characterized in terms of membrane performance such as: permeate flux, heavy metal rejection and energy consumption; wettability performance such as liquid entry pressure (LEP), and water contact angle (WCA) ; membrane structure such as mean with maximum pore size and porosity; membrane integrity such as mechanical and thermal integrity. The heavy metal rejection was ˃ 99% for all single and dual layer membranes when filtering artificial wastewater (Pb, Cd, Cr, Cu, Ni). When compared with single layer electrospun membrane made from spinning 16 ml PVDF, dual layer membrane made from the same spinning volume exhibited some improvement, such as higher permeate flux above 23 Litre/m2.h (LMH) when filtering 2500 ppm concentration heavy metal feed water. Additionally, both sets of dual layer membrane demonstrated better mechanical performance and slight reduction of LEP compared with single layer electrospun membrane. Journal Article Desalination 439 31 45 Elsevier 0011-9164 Air gap membrane distillation; Dual layers; Superhydrophobic–hydrophobic membrane; Heavy metal recovery; Membrane thickness 1 8 2018 2018-08-01 10.1016/j.desal.2018.04.003 COLLEGE NANME COLLEGE CODE Swansea University 2018-05-21T12:24:10.9449108 2018-04-03T17:18:45.2160673 Faculty of Science and Engineering School of Engineering and Applied Sciences - Biomedical Engineering Hadi Attia 1 Daniel Johnson 0000-0001-6921-0389 2 Chris J. Wright 3 Nidal Hilal 4 Christopher Wright 0000-0003-2375-8159 5 0039302-12042018155116.pdf attia2018.pdf 2018-04-12T15:51:16.4230000 Output 2614500 application/pdf Accepted Manuscript true 2019-04-09T00:00:00.0000000 true eng
title Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation
spellingShingle Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation
Daniel Johnson
Nidal Hilal
Christopher Wright
title_short Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation
title_full Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation
title_fullStr Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation
title_full_unstemmed Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation
title_sort Comparison between dual-layer (superhydrophobic–hydrophobic) and single superhydrophobic layer electrospun membranes for heavy metal recovery by air-gap membrane distillation
author_id_str_mv 4bdcc306062428d2715b0dd308cc092f
3acba771241d878c8e35ff464aec0342
235e125ac3463e2ee7fc98604bf879ce
author_id_fullname_str_mv 4bdcc306062428d2715b0dd308cc092f_***_Daniel Johnson
3acba771241d878c8e35ff464aec0342_***_Nidal Hilal
235e125ac3463e2ee7fc98604bf879ce_***_Christopher Wright
author Daniel Johnson
Nidal Hilal
Christopher Wright
author2 Hadi Attia
Daniel Johnson
Chris J. Wright
Nidal Hilal
Christopher Wright
format Journal article
container_title Desalination
container_volume 439
container_start_page 31
publishDate 2018
institution Swansea University
issn 0011-9164
doi_str_mv 10.1016/j.desal.2018.04.003
publisher Elsevier
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 - Biomedical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Biomedical Engineering
document_store_str 1
active_str 0
description A novel approach to enhance membrane performance using electrospinning fabrication technique for recovery of heavy metals using air-gap membrane distillation is described. Accordingly, a comprehensive study was accomplished to fabricate a unique electrospun dual-layer membrane (ESD) with an upper superhydrophobic layer and hydrophobic electrospun support layer and compare with a superhydrophobic electrospun single layer membrane (ESS). Superhydrophobic alumina nanoparticles (Al2O3) were embedded in a low polymer concentration of polyvinylidene fluoride (PVDF) to produce superhydrophobic ESS and top layer of ESD using electrospinning technique, while a mat with different concentrations of PVDF were used as hydrophobic electrospun support layer. In this study, dual layer membranes were fabricated in two sets. In the first set, layer thickness was varied by changing the spinning volume of the top and support layer with maintain total spinning volume, while in the second set the fibre diameter of the support layer was varied by changing the polymer concentration. Moreover, the electrospun membranes were characterized in terms of membrane performance such as: permeate flux, heavy metal rejection and energy consumption; wettability performance such as liquid entry pressure (LEP), and water contact angle (WCA) ; membrane structure such as mean with maximum pore size and porosity; membrane integrity such as mechanical and thermal integrity. The heavy metal rejection was ˃ 99% for all single and dual layer membranes when filtering artificial wastewater (Pb, Cd, Cr, Cu, Ni). When compared with single layer electrospun membrane made from spinning 16 ml PVDF, dual layer membrane made from the same spinning volume exhibited some improvement, such as higher permeate flux above 23 Litre/m2.h (LMH) when filtering 2500 ppm concentration heavy metal feed water. Additionally, both sets of dual layer membrane demonstrated better mechanical performance and slight reduction of LEP compared with single layer electrospun membrane.
published_date 2018-08-01T03:49:53Z
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score 11.037166

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