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Selective laser assisted impairment of reverse osmosis membranes
Monitoring the loss of integrity in reverse osmosis (RO) membranes is crucial for protection of public health as small imperfections can result in catastrophic pathogen outbreaks. However, understanding the phenomena accompanying the loss of integrity in RO membranes relies on properly characterizin...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7058821/ https://www.ncbi.nlm.nih.gov/pubmed/32154127 http://dx.doi.org/10.1016/j.mex.2020.100830 |
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author | Donose, Bogdan C. Premavally, Ashwin Vijayan Pype, Marie-Laure Doederer, Katrin |
author_facet | Donose, Bogdan C. Premavally, Ashwin Vijayan Pype, Marie-Laure Doederer, Katrin |
author_sort | Donose, Bogdan C. |
collection | PubMed |
description | Monitoring the loss of integrity in reverse osmosis (RO) membranes is crucial for protection of public health as small imperfections can result in catastrophic pathogen outbreaks. However, understanding the phenomena accompanying the loss of integrity in RO membranes relies on properly characterizing and interpreting performance data. Reproducing chemical and mechanical damage in model membranes that mimic the conditions of real-time operation is difficult. Mechanical impairment is particularly challenging, since one needs to damage selectively and in a controlled manner (producing holes of desired size) the barrier (polyamide) and/or the support layer (polyether sulfone and polyester). In this work we develop a straightforward approach to produce arrays of micro-holes in a commercially available RO membrane employing nanosecond pulsed laser ablation. The new approach is used to prepare four samples with different number of holes with constant diameter and increasing hole depth. These samples were further tested to reveal the impairment impact on filtration performance. It was observed that the flux was linked with the laser pulse density/penetration. • Uniform radius defects were created in RO membranes. • Higher pulse density leads to deeper defects. • Ablation of all three layers can be attained. |
format | Online Article Text |
id | pubmed-7058821 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-70588212020-03-09 Selective laser assisted impairment of reverse osmosis membranes Donose, Bogdan C. Premavally, Ashwin Vijayan Pype, Marie-Laure Doederer, Katrin MethodsX Chemical Engineering Monitoring the loss of integrity in reverse osmosis (RO) membranes is crucial for protection of public health as small imperfections can result in catastrophic pathogen outbreaks. However, understanding the phenomena accompanying the loss of integrity in RO membranes relies on properly characterizing and interpreting performance data. Reproducing chemical and mechanical damage in model membranes that mimic the conditions of real-time operation is difficult. Mechanical impairment is particularly challenging, since one needs to damage selectively and in a controlled manner (producing holes of desired size) the barrier (polyamide) and/or the support layer (polyether sulfone and polyester). In this work we develop a straightforward approach to produce arrays of micro-holes in a commercially available RO membrane employing nanosecond pulsed laser ablation. The new approach is used to prepare four samples with different number of holes with constant diameter and increasing hole depth. These samples were further tested to reveal the impairment impact on filtration performance. It was observed that the flux was linked with the laser pulse density/penetration. • Uniform radius defects were created in RO membranes. • Higher pulse density leads to deeper defects. • Ablation of all three layers can be attained. Elsevier 2020-02-21 /pmc/articles/PMC7058821/ /pubmed/32154127 http://dx.doi.org/10.1016/j.mex.2020.100830 Text en © 2020 The Author(s). Published by Elsevier B.V. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Chemical Engineering Donose, Bogdan C. Premavally, Ashwin Vijayan Pype, Marie-Laure Doederer, Katrin Selective laser assisted impairment of reverse osmosis membranes |
title | Selective laser assisted impairment of reverse osmosis membranes |
title_full | Selective laser assisted impairment of reverse osmosis membranes |
title_fullStr | Selective laser assisted impairment of reverse osmosis membranes |
title_full_unstemmed | Selective laser assisted impairment of reverse osmosis membranes |
title_short | Selective laser assisted impairment of reverse osmosis membranes |
title_sort | selective laser assisted impairment of reverse osmosis membranes |
topic | Chemical Engineering |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7058821/ https://www.ncbi.nlm.nih.gov/pubmed/32154127 http://dx.doi.org/10.1016/j.mex.2020.100830 |
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