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Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes

A promising solution for the implementation of extraction processes is liquid–liquid membrane contactors. The transfer of the target component from one immiscible liquid to another is carried out inside membrane pores. For the first time, highly asymmetric track-etched membranes made of polyethylene...

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Autores principales: Bazhenov, Stepan, Kristavchuk, Olga, Kostyanaya, Margarita, Belogorlov, Anton, Ashimov, Ruslan, Apel, Pavel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703572/
https://www.ncbi.nlm.nih.gov/pubmed/34940449
http://dx.doi.org/10.3390/membranes11120949
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author Bazhenov, Stepan
Kristavchuk, Olga
Kostyanaya, Margarita
Belogorlov, Anton
Ashimov, Ruslan
Apel, Pavel
author_facet Bazhenov, Stepan
Kristavchuk, Olga
Kostyanaya, Margarita
Belogorlov, Anton
Ashimov, Ruslan
Apel, Pavel
author_sort Bazhenov, Stepan
collection PubMed
description A promising solution for the implementation of extraction processes is liquid–liquid membrane contactors. The transfer of the target component from one immiscible liquid to another is carried out inside membrane pores. For the first time, highly asymmetric track-etched membranes made of polyethylene terephthalate (PET) of the same thickness but with different pore diameters (12.5–19 nm on one side and hundreds of nanometers on the other side) were studied in the liquid–liquid membrane contactor. For analysis of the liquid–liquid interface stability, two systems widely diverging in the interfacial tension value were used: water–pentanol and water–hexadecane. The interface stability was investigated depending on the following process parameters: the porous structure, the location of the asymmetric membrane in the contactor, the velocities of liquids, and the pressure drop between them. It was shown that the stability of the interface increases with decreasing pore size. Furthermore, it is preferable to supply the aqueous phase from the side of the asymmetric membrane with the larger pore size. The asymmetry of the porous structure of the membrane makes it possible to increase the range of pressure drop values between the phases by at least two times (from 5 to 10 kPa), which does not lead to mutual dispersion of the liquids. The liquid–liquid contactor based on the asymmetric track-etched membranes allows for the extraction of impurities from the organic phase into the aqueous phase by using a 1% solution of acetone in hexadecane as an example.
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spelling pubmed-87035722021-12-25 Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes Bazhenov, Stepan Kristavchuk, Olga Kostyanaya, Margarita Belogorlov, Anton Ashimov, Ruslan Apel, Pavel Membranes (Basel) Article A promising solution for the implementation of extraction processes is liquid–liquid membrane contactors. The transfer of the target component from one immiscible liquid to another is carried out inside membrane pores. For the first time, highly asymmetric track-etched membranes made of polyethylene terephthalate (PET) of the same thickness but with different pore diameters (12.5–19 nm on one side and hundreds of nanometers on the other side) were studied in the liquid–liquid membrane contactor. For analysis of the liquid–liquid interface stability, two systems widely diverging in the interfacial tension value were used: water–pentanol and water–hexadecane. The interface stability was investigated depending on the following process parameters: the porous structure, the location of the asymmetric membrane in the contactor, the velocities of liquids, and the pressure drop between them. It was shown that the stability of the interface increases with decreasing pore size. Furthermore, it is preferable to supply the aqueous phase from the side of the asymmetric membrane with the larger pore size. The asymmetry of the porous structure of the membrane makes it possible to increase the range of pressure drop values between the phases by at least two times (from 5 to 10 kPa), which does not lead to mutual dispersion of the liquids. The liquid–liquid contactor based on the asymmetric track-etched membranes allows for the extraction of impurities from the organic phase into the aqueous phase by using a 1% solution of acetone in hexadecane as an example. MDPI 2021-11-30 /pmc/articles/PMC8703572/ /pubmed/34940449 http://dx.doi.org/10.3390/membranes11120949 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bazhenov, Stepan
Kristavchuk, Olga
Kostyanaya, Margarita
Belogorlov, Anton
Ashimov, Ruslan
Apel, Pavel
Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes
title Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes
title_full Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes
title_fullStr Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes
title_full_unstemmed Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes
title_short Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes
title_sort interphase surface stability in liquid-liquid membrane contactors based on track-etched membranes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703572/
https://www.ncbi.nlm.nih.gov/pubmed/34940449
http://dx.doi.org/10.3390/membranes11120949
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