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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ftunivlimericfig:oai:figshare.com:article/19810654 2023-05-15T15:52:38+02:00 Membraneless water filtration using CO2 Sangwoo Shin Orest Shardt Patrick B. Warren Howard A. Stone 2017-01-01T00:00:00Z https://figshare.com/articles/journal_contribution/Membraneless_water_filtration_using_CO2/19810654 unknown 10344/6342 https://figshare.com/articles/journal_contribution/Membraneless_water_filtration_using_CO2/19810654 CC BY-NC-SA 1.0 CC-BY-NC-SA membraneless water filtration co2 Text Journal contribution 2017 ftunivlimericfig 2022-12-28T08:53:40Z 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. Other Non-Article Part of Journal/Newspaper Carbonic acid Research from University of Limerick |
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Research from University of Limerick |
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membraneless water filtration co2 |
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membraneless water filtration co2 Sangwoo Shin Orest Shardt Patrick B. Warren Howard A. Stone Membraneless water filtration using CO2 |
topic_facet |
membraneless water filtration co2 |
description |
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 |
Other Non-Article Part of Journal/Newspaper |
author |
Sangwoo Shin Orest Shardt Patrick B. Warren Howard A. Stone |
author_facet |
Sangwoo Shin Orest Shardt Patrick B. Warren Howard A. Stone |
author_sort |
Sangwoo Shin |
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 |
publishDate |
2017 |
url |
https://figshare.com/articles/journal_contribution/Membraneless_water_filtration_using_CO2/19810654 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
10344/6342 https://figshare.com/articles/journal_contribution/Membraneless_water_filtration_using_CO2/19810654 |
op_rights |
CC BY-NC-SA 1.0 |
op_rightsnorm |
CC-BY-NC-SA |
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1766387757456818176 |