Membraneless water filtration using CO2
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...
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ftpubmed:oai:pubmedcentral.nih.gov:5418569 2023-05-15T15:52:37+02:00 Membraneless water filtration using CO2 Shin, Sangwoo Shardt, Orest Warren, Patrick B. Stone, Howard A. 2017-05-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5418569/ http://www.ncbi.nlm.nih.gov/pubmed/28462929 https://doi.org/10.1038/ncomms15181 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5418569/ http://www.ncbi.nlm.nih.gov/pubmed/28462929 http://dx.doi.org/10.1038/ncomms15181 Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2017 ftpubmed https://doi.org/10.1038/ncomms15181 2017-07-09T00:01:36Z 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. Text Carbonic acid PubMed Central (PMC) Nature Communications 8 1 |
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Article Shin, Sangwoo Shardt, Orest Warren, Patrick B. Stone, Howard A. Membraneless water filtration using CO2 |
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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. |
format |
Text |
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://www.ncbi.nlm.nih.gov/pmc/articles/PMC5418569/ http://www.ncbi.nlm.nih.gov/pubmed/28462929 https://doi.org/10.1038/ncomms15181 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5418569/ http://www.ncbi.nlm.nih.gov/pubmed/28462929 http://dx.doi.org/10.1038/ncomms15181 |
op_rights |
Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms15181 |
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Nature Communications |
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