Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System
This work aims to theoretically investigate the effect of both the fixed charge density of ion exchange membranes and the ionic strength of the treated aqueous NaCl solution on the generated Donnan potential at thermodynamic equilibrium conditions. The direct objective of our work is to calculate th...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | , |
| Format: | article |
| Published: |
2023
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/11073/25397 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1864513433571950592 |
|---|---|
| author | Al-Sakaji, Baraa A. K. |
| author2 | Husseini, Ghaleb Darwish, Naif |
| author2_role | author author |
| author_facet | Al-Sakaji, Baraa A. K. Husseini, Ghaleb Darwish, Naif |
| author_role | author |
| dc.creator.none.fl_str_mv | Al-Sakaji, Baraa A. K. Husseini, Ghaleb Darwish, Naif |
| dc.date.none.fl_str_mv | 2023-11-06T08:38:11Z 2023-11-06T08:38:11Z 2023 |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | Al-Sakaji, B.A.K.; Husseini, G.A.; Darwish, N.A. Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System. Water 2023, 15, 3830. https://doi.org/10.3390/w15213830 2073-4441 http://hdl.handle.net/11073/25397 10.3390/w15213830 |
| dc.language.none.fl_str_mv | en_US |
| dc.publisher.none.fl_str_mv | MDPI |
| dc.relation.none.fl_str_mv | https://doi.org/10.3390/w15213830 |
| dc.subject.none.fl_str_mv | Donnan potential Ion-exchange membranes The Meissner model The Debye–Huckel model |
| dc.title.none.fl_str_mv | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System |
| dc.type.none.fl_str_mv | Peer-Reviewed Published version info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | This work aims to theoretically investigate the effect of both the fixed charge density of ion exchange membranes and the ionic strength of the treated aqueous NaCl solution on the generated Donnan potential at thermodynamic equilibrium conditions. The direct objective of our work is to calculate the equilibrium concentration of the Cl⁻ co-ion inside a swelled cation-exchange membrane equilibrated with a water/NaCl system. Two activity coefficient models are employed, i.e., the Debye–Huckel (DH) model (as a reference model) and the Meissner model, which is known for its applicability in treating concentrated solutions. Experimental data available in the literature for Donnan potential are used to verify model predictions. Our study confirms that a high fixed charge density is required to counterbalance the deterioration in membrane selectivity encountered in high-salinity systems. The DH model can be safely used to predict the Donnan potential for feed compositions up to 0.1 M. At higher compositions, the DH model significantly overestimates the predicted (absolute) Donnan potential compared to the Meissner model. The osmotic pressure resulting from the difference in ionic concentration between the membrane phase and the feed phase is found to have insignificant effects on the Donnan potential. The equilibrium computations and methodology are presented in a general way that enables handling multivalent electrolyte systems such as CaCl₂. |
| format | article |
| id | aus_7e22e493906fb6c61317aa39e7d40de7 |
| identifier_str_mv | Al-Sakaji, B.A.K.; Husseini, G.A.; Darwish, N.A. Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System. Water 2023, 15, 3830. https://doi.org/10.3390/w15213830 2073-4441 10.3390/w15213830 |
| language_invalid_str_mv | en_US |
| network_acronym_str | aus |
| network_name_str | aus |
| oai_identifier_str | oai:repository.aus.edu:11073/25397 |
| publishDate | 2023 |
| publisher.none.fl_str_mv | MDPI |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane SystemAl-Sakaji, Baraa A. K.Husseini, GhalebDarwish, NaifDonnan potentialIon-exchange membranesThe Meissner modelThe Debye–Huckel modelThis work aims to theoretically investigate the effect of both the fixed charge density of ion exchange membranes and the ionic strength of the treated aqueous NaCl solution on the generated Donnan potential at thermodynamic equilibrium conditions. The direct objective of our work is to calculate the equilibrium concentration of the Cl⁻ co-ion inside a swelled cation-exchange membrane equilibrated with a water/NaCl system. Two activity coefficient models are employed, i.e., the Debye–Huckel (DH) model (as a reference model) and the Meissner model, which is known for its applicability in treating concentrated solutions. Experimental data available in the literature for Donnan potential are used to verify model predictions. Our study confirms that a high fixed charge density is required to counterbalance the deterioration in membrane selectivity encountered in high-salinity systems. The DH model can be safely used to predict the Donnan potential for feed compositions up to 0.1 M. At higher compositions, the DH model significantly overestimates the predicted (absolute) Donnan potential compared to the Meissner model. The osmotic pressure resulting from the difference in ionic concentration between the membrane phase and the feed phase is found to have insignificant effects on the Donnan potential. The equilibrium computations and methodology are presented in a general way that enables handling multivalent electrolyte systems such as CaCl₂.American University of SharjahMDPI2023-11-06T08:38:11Z2023-11-06T08:38:11Z2023Peer-ReviewedPublished versioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfAl-Sakaji, B.A.K.; Husseini, G.A.; Darwish, N.A. Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System. Water 2023, 15, 3830. https://doi.org/10.3390/w152138302073-4441http://hdl.handle.net/11073/2539710.3390/w15213830en_UShttps://doi.org/10.3390/w15213830oai:repository.aus.edu:11073/253972024-08-22T12:05:17Z |
| spellingShingle | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System Al-Sakaji, Baraa A. K. Donnan potential Ion-exchange membranes The Meissner model The Debye–Huckel model |
| status_str | publishedVersion |
| title | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System |
| title_full | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System |
| title_fullStr | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System |
| title_full_unstemmed | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System |
| title_short | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System |
| title_sort | Impact of Ionic Strength and Charge Density on Donnan Potential in the NaCl-Cation Exchange Membrane System |
| topic | Donnan potential Ion-exchange membranes The Meissner model The Debye–Huckel model |
| url | http://hdl.handle.net/11073/25397 |