Membraneless water filtration using CO2
peer-reviewed Water purification technologies such as microfiltration/ultrafiltration and reverse osmosis utilize porous membranes to remove suspended particles and solutes. These membranes, however, cause many drawbacks such as a high pumping cost and a need for periodic replacement due to fouling....
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Online Access: | http://hdl.handle.net/10344/6342 https://doi.org/10.1038/ncomms15181 |
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ftunivlimerick:oai:ulir.ul.ie:10344/6342 2023-05-15T15:52:39+02:00 Membraneless water filtration using CO2 Shin, Sangwoo Shardt, Orest Warren, Patrick B. Stone, Howard A. Natural Sciences and Engineering Research Council of Canada 2017 http://hdl.handle.net/10344/6342 https://doi.org/10.1038/ncomms15181 eng eng Nature Publishing Group Nature Communications;8:15181 http://dx.doi.org/10.1038/ncomms15181 http://hdl.handle.net/10344/6342 doi:10.1038/ncomms15181 info:eu-repo/semantics/openAccess membraneless water filtration co2 info:eu-repo/semantics/article all_ul_research ul_published_reviewed 2017 ftunivlimerick https://doi.org/10.1038/ncomms15181 2022-05-23T15:13:53Z peer-reviewed Water purification technologies such as microfiltration/ultrafiltration and reverse osmosis utilize porous membranes to remove suspended particles and solutes. These membranes, however, cause many drawbacks such as a high pumping cost and a need for periodic replacement due to fouling. Here we show an alternative membraneless method for separating suspended particles by exposing the colloidal suspension to CO2. Dissolution of CO2 into the suspension creates solute gradients that drive phoretic motion of particles. Due to the large diffusion potential generated by the dissociation of carbonic acid, colloidal particles move either away from or towards the gas–liquid interface depending on their surface charge. Using the directed motion of particles induced by exposure to CO2, we demonstrate a scalable, continuous flow, membraneless particle filtration process that exhibits low energy consumption, three orders of magnitude lower than conventional microfiltration/ultrafiltration processes, and is essentially free from fouling. Article in Journal/Newspaper Carbonic acid University of Limerick: Institutional Repository (ULIR) Nature Communications 8 1 |
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University of Limerick: Institutional Repository (ULIR) |
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English |
topic |
membraneless water filtration co2 |
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membraneless water filtration co2 Shin, Sangwoo Shardt, Orest Warren, Patrick B. Stone, Howard A. Membraneless water filtration using CO2 |
topic_facet |
membraneless water filtration co2 |
description |
peer-reviewed Water purification technologies such as microfiltration/ultrafiltration and reverse osmosis utilize porous membranes to remove suspended particles and solutes. These membranes, however, cause many drawbacks such as a high pumping cost and a need for periodic replacement due to fouling. Here we show an alternative membraneless method for separating suspended particles by exposing the colloidal suspension to CO2. Dissolution of CO2 into the suspension creates solute gradients that drive phoretic motion of particles. Due to the large diffusion potential generated by the dissociation of carbonic acid, colloidal particles move either away from or towards the gas–liquid interface depending on their surface charge. Using the directed motion of particles induced by exposure to CO2, we demonstrate a scalable, continuous flow, membraneless particle filtration process that exhibits low energy consumption, three orders of magnitude lower than conventional microfiltration/ultrafiltration processes, and is essentially free from fouling. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Shin, Sangwoo Shardt, Orest Warren, Patrick B. Stone, Howard A. |
author_facet |
Shin, Sangwoo Shardt, Orest Warren, Patrick B. Stone, Howard A. |
author_sort |
Shin, Sangwoo |
title |
Membraneless water filtration using CO2 |
title_short |
Membraneless water filtration using CO2 |
title_full |
Membraneless water filtration using CO2 |
title_fullStr |
Membraneless water filtration using CO2 |
title_full_unstemmed |
Membraneless water filtration using CO2 |
title_sort |
membraneless water filtration using co2 |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
http://hdl.handle.net/10344/6342 https://doi.org/10.1038/ncomms15181 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
Nature Communications;8:15181 http://dx.doi.org/10.1038/ncomms15181 http://hdl.handle.net/10344/6342 doi:10.1038/ncomms15181 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/ncomms15181 |
container_title |
Nature Communications |
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8 |
container_issue |
1 |
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1766387766254370816 |