Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers
The in situ synthesis of Fe<sup>0</sup> particles using poly-(acrylic acid) (PAA) is an effective tool for fabricating catalytic membranes relevant to advanced oxidation processes (AOPs). Through their synthesis in polyelectrolyte multilayer-based nanofiltration membranes, it becomes pos...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/13/4/388 |
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| author | Tao Wang Enrique Serra Bachs Joris de Grooth Wiebe M. de Vos |
| author_facet | Tao Wang Enrique Serra Bachs Joris de Grooth Wiebe M. de Vos |
| author_sort | Tao Wang |
| collection | DOAJ |
| description | The in situ synthesis of Fe<sup>0</sup> particles using poly-(acrylic acid) (PAA) is an effective tool for fabricating catalytic membranes relevant to advanced oxidation processes (AOPs). Through their synthesis in polyelectrolyte multilayer-based nanofiltration membranes, it becomes possible to reject and degrade organic micropollutants simultaneously. In this work, we compare two approaches, where Fe<sup>0</sup> nanoparticles are synthesized in or on symmetric multilayers and asymmetric multilayers. For the membrane with symmetric multilayers (4.0 bilayers of poly (diallyldimethylammonium chloride) (PDADMAC)/PAA), the in situ synthesized Fe<sup>0</sup> increased its permeability from 1.77 L/m<sup>2</sup>/h/bar to 17.67 L/m<sup>2</sup>/h/bar when three Fe<sup>2+</sup> binding/reducing cycles were conducted. Likely, the low chemical stability of this polyelectrolyte multilayer allows it to become damaged through the relatively harsh synthesis. However, when the in situ synthesis of Fe<sup>0</sup> was performed on top of asymmetric multilayers, which consist of 7.0 bilayers of the very chemically stable combination of PDADMAC and poly(styrene sulfonate) (PSS), coated with PDADMAC/PAA multilayers, the negative effect of the Fe<sup>0</sup> in situ synthesized can be mitigated, and the permeability only increased from 1.96 L/m<sup>2</sup>/h/bar to 2.38 L/m<sup>2</sup>/h/bar with three Fe<sup>2+</sup> binding/reducing cycles. The obtained membranes with asymmetric polyelectrolyte multilayers exhibited an excellent naproxen treatment efficiency, with over 80% naproxen rejection on the permeate side and 25% naproxen removal on the feed solution side after 1 h. This work demonstrates the potential of especially asymmetric polyelectrolyte multilayers to be effectively combined with AOPs for the treatment of micropollutants (MPs). |
| first_indexed | 2024-03-11T04:45:18Z |
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| id | doaj.art-075adfca3c02481abf5599631072c0bf |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-11T04:45:18Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-075adfca3c02481abf5599631072c0bf2023-11-17T20:22:54ZengMDPI AGMembranes2077-03752023-03-0113438810.3390/membranes13040388Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte MultilayersTao Wang0Enrique Serra Bachs1Joris de Grooth2Wiebe M. de Vos3MESA+ Institute of Nanotechnology, University of Twente, 7500 AE Enschede, The NetherlandsMESA+ Institute of Nanotechnology, University of Twente, 7500 AE Enschede, The NetherlandsMESA+ Institute of Nanotechnology, University of Twente, 7500 AE Enschede, The NetherlandsMESA+ Institute of Nanotechnology, University of Twente, 7500 AE Enschede, The NetherlandsThe in situ synthesis of Fe<sup>0</sup> particles using poly-(acrylic acid) (PAA) is an effective tool for fabricating catalytic membranes relevant to advanced oxidation processes (AOPs). Through their synthesis in polyelectrolyte multilayer-based nanofiltration membranes, it becomes possible to reject and degrade organic micropollutants simultaneously. In this work, we compare two approaches, where Fe<sup>0</sup> nanoparticles are synthesized in or on symmetric multilayers and asymmetric multilayers. For the membrane with symmetric multilayers (4.0 bilayers of poly (diallyldimethylammonium chloride) (PDADMAC)/PAA), the in situ synthesized Fe<sup>0</sup> increased its permeability from 1.77 L/m<sup>2</sup>/h/bar to 17.67 L/m<sup>2</sup>/h/bar when three Fe<sup>2+</sup> binding/reducing cycles were conducted. Likely, the low chemical stability of this polyelectrolyte multilayer allows it to become damaged through the relatively harsh synthesis. However, when the in situ synthesis of Fe<sup>0</sup> was performed on top of asymmetric multilayers, which consist of 7.0 bilayers of the very chemically stable combination of PDADMAC and poly(styrene sulfonate) (PSS), coated with PDADMAC/PAA multilayers, the negative effect of the Fe<sup>0</sup> in situ synthesized can be mitigated, and the permeability only increased from 1.96 L/m<sup>2</sup>/h/bar to 2.38 L/m<sup>2</sup>/h/bar with three Fe<sup>2+</sup> binding/reducing cycles. The obtained membranes with asymmetric polyelectrolyte multilayers exhibited an excellent naproxen treatment efficiency, with over 80% naproxen rejection on the permeate side and 25% naproxen removal on the feed solution side after 1 h. This work demonstrates the potential of especially asymmetric polyelectrolyte multilayers to be effectively combined with AOPs for the treatment of micropollutants (MPs).https://www.mdpi.com/2077-0375/13/4/388catalytic membranesin situ synthesisasymmetric polyelectrolytes multilayersadvanced oxidation processes |
| spellingShingle | Tao Wang Enrique Serra Bachs Joris de Grooth Wiebe M. de Vos Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers Membranes catalytic membranes in situ synthesis asymmetric polyelectrolytes multilayers advanced oxidation processes |
| title | Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers |
| title_full | Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers |
| title_fullStr | Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers |
| title_full_unstemmed | Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers |
| title_short | Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe<sup>0</sup> Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers |
| title_sort | advanced oxidation processes coupled to nanofiltration membranes with catalytic fe sup 0 sup nanoparticles in symmetric and asymmetric polyelectrolyte multilayers |
| topic | catalytic membranes in situ synthesis asymmetric polyelectrolytes multilayers advanced oxidation processes |
| url | https://www.mdpi.com/2077-0375/13/4/388 |
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