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Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification

[Image: see text] The increase of micropollutant concentration in both surface and groundwater is an emerging concern for the environment and human health. Most of such small organic molecules (medicines, hormones, and plasticizers) enter the environment via our wastewater, because they are not suff...

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Autores principales: Reurink, Dennis M., te Brinke, Esra, Achterhuis, Iske, Roesink, Hendrik D. W., de Vos, Wiebe M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6748121/
https://www.ncbi.nlm.nih.gov/pubmed/31544172
http://dx.doi.org/10.1021/acsapm.9b00689
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author Reurink, Dennis M.
te Brinke, Esra
Achterhuis, Iske
Roesink, Hendrik D. W.
de Vos, Wiebe M.
author_facet Reurink, Dennis M.
te Brinke, Esra
Achterhuis, Iske
Roesink, Hendrik D. W.
de Vos, Wiebe M.
author_sort Reurink, Dennis M.
collection PubMed
description [Image: see text] The increase of micropollutant concentration in both surface and groundwater is an emerging concern for the environment and human health. Most of such small organic molecules (medicines, hormones, and plasticizers) enter the environment via our wastewater, because they are not sufficiently removed by the current techniques applied in wastewater treatment plants. A possible solution to remove micropollutants is the usage of polyelectrolyte multilayer (PEM) based membranes. PEM membranes have received a growing interest in the past decade due to their high chemical and physical stability and their high permeability and selectivity. A popular polyelectrolyte pair to make dense PEM membranes with high salt retentions is the combination of poly(allylamine hydrochloride) (PAH) and poly(sodium 4-styrenesulfonate) (PSS). Unfortunately, smaller micropollutants (such as bisphenol A, sulfamethoxazole, naproxen, and bezafibrate) still show significant permeation through this membrane. In this study, for the first time, a single final layer of Nafion is applied on the PEM to increase the density of the PEM membrane. It is shown that when terminating with Nafion, the swelling of the multilayer decreases by 50%. These pronounced changes in layer structure are reflected by changes in membrane performance, such as a lower molecular weight cutoff (MWCO) and an increasing hydraulic membrane resistance. Furthermore, we show that the Nafion content of the multilayer can be increased by constructing a Nafion/PAH multilayer on top of the existing PSS/PAH multilayer, thereby lowering the MWCO. Although hydraulic resistance increases, these PSS/PAH/Nafion-based multilayers show excellent performance in rejecting difficult-to-remove micropollutants that have low molecular weight (200–650 Da) and different charges. Overall, a cocktail of eight small micropollutants can be removed up to 97% by these membranes, allowing strongly enhanced water purification.
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spelling pubmed-67481212019-09-18 Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification Reurink, Dennis M. te Brinke, Esra Achterhuis, Iske Roesink, Hendrik D. W. de Vos, Wiebe M. ACS Appl Polym Mater [Image: see text] The increase of micropollutant concentration in both surface and groundwater is an emerging concern for the environment and human health. Most of such small organic molecules (medicines, hormones, and plasticizers) enter the environment via our wastewater, because they are not sufficiently removed by the current techniques applied in wastewater treatment plants. A possible solution to remove micropollutants is the usage of polyelectrolyte multilayer (PEM) based membranes. PEM membranes have received a growing interest in the past decade due to their high chemical and physical stability and their high permeability and selectivity. A popular polyelectrolyte pair to make dense PEM membranes with high salt retentions is the combination of poly(allylamine hydrochloride) (PAH) and poly(sodium 4-styrenesulfonate) (PSS). Unfortunately, smaller micropollutants (such as bisphenol A, sulfamethoxazole, naproxen, and bezafibrate) still show significant permeation through this membrane. In this study, for the first time, a single final layer of Nafion is applied on the PEM to increase the density of the PEM membrane. It is shown that when terminating with Nafion, the swelling of the multilayer decreases by 50%. These pronounced changes in layer structure are reflected by changes in membrane performance, such as a lower molecular weight cutoff (MWCO) and an increasing hydraulic membrane resistance. Furthermore, we show that the Nafion content of the multilayer can be increased by constructing a Nafion/PAH multilayer on top of the existing PSS/PAH multilayer, thereby lowering the MWCO. Although hydraulic resistance increases, these PSS/PAH/Nafion-based multilayers show excellent performance in rejecting difficult-to-remove micropollutants that have low molecular weight (200–650 Da) and different charges. Overall, a cocktail of eight small micropollutants can be removed up to 97% by these membranes, allowing strongly enhanced water purification. American Chemical Society 2019-08-19 2019-09-13 /pmc/articles/PMC6748121/ /pubmed/31544172 http://dx.doi.org/10.1021/acsapm.9b00689 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
spellingShingle Reurink, Dennis M.
te Brinke, Esra
Achterhuis, Iske
Roesink, Hendrik D. W.
de Vos, Wiebe M.
Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification
title Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification
title_full Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification
title_fullStr Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification
title_full_unstemmed Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification
title_short Nafion-Based Low-Hydration Polyelectrolyte Multilayer Membranes for Enhanced Water Purification
title_sort nafion-based low-hydration polyelectrolyte multilayer membranes for enhanced water purification
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6748121/
https://www.ncbi.nlm.nih.gov/pubmed/31544172
http://dx.doi.org/10.1021/acsapm.9b00689
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