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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
Desalination, Volume: 439, Pages: 31 - 45
Swansea University Authors:
Daniel Johnson , Nidal Hilal, Christopher Wright
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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...
Published in: | Desalination |
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ISSN: | 0011-9164 |
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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 ˃ 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–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> |
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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 |
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Journal article |
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Desalination |
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439 |
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31 |
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2018 |
institution |
Swansea University |
issn |
0011-9164 |
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10.1016/j.desal.2018.04.003 |
publisher |
Elsevier |
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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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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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School of Engineering and Applied Sciences - Biomedical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Biomedical Engineering |
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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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1763752430977155072 |
score |
11.021648 |