Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction
Electrochemistry at the interface between two immiscible electrolyte solutions has been presented as a method of electrochemically modulated liquid-liquid extraction, where ions in a mixture can be selectively partitioned as a function of the applied interfacial potential difference. In this st...
| Main Authors: | , |
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| Format: | Journal Article |
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American Chemical Society
2006
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| Online Access: | http://hdl.handle.net/20.500.11937/22822 |
| _version_ | 1848750979120365568 |
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| author | Berduque, A. Arrigan, Damien |
| author_facet | Berduque, A. Arrigan, Damien |
| author_sort | Berduque, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Electrochemistry at the interface between two immiscible electrolyte solutions has been presented as a method of electrochemically modulated liquid-liquid extraction, where ions in a mixture can be selectively partitioned as a function of the applied interfacial potential difference. In this study, a mixture comprising 4-octylbenzenesulfonate (4-OBSA-) and tetraethylammonium (TEA+) ions was evaluated. The application of negative potential differences enabled the selective extraction of 4-OBSAinto the organic phase, and more positive potential differences enabled the selective extraction of TEA+. However, intermediate potentials lead to the coextraction of both ions into the organic phase, with apparent selectivity for TEA+ over 4-OBSA-. An increased concentration of either ion in the mixture inhibited the extraction response of the other ion, but the order of the extraction at these intermediate potentials was always TEA+ followed by 4-OBSA-. The reasons for the selectivity for the cation over the anion are discussed. |
| first_indexed | 2025-11-14T07:45:26Z |
| format | Journal Article |
| id | curtin-20.500.11937-22822 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:45:26Z |
| publishDate | 2006 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-228222017-09-13T13:58:23Z Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction Berduque, A. Arrigan, Damien Electrochemistry at the interface between two immiscible electrolyte solutions has been presented as a method of electrochemically modulated liquid-liquid extraction, where ions in a mixture can be selectively partitioned as a function of the applied interfacial potential difference. In this study, a mixture comprising 4-octylbenzenesulfonate (4-OBSA-) and tetraethylammonium (TEA+) ions was evaluated. The application of negative potential differences enabled the selective extraction of 4-OBSAinto the organic phase, and more positive potential differences enabled the selective extraction of TEA+. However, intermediate potentials lead to the coextraction of both ions into the organic phase, with apparent selectivity for TEA+ over 4-OBSA-. An increased concentration of either ion in the mixture inhibited the extraction response of the other ion, but the order of the extraction at these intermediate potentials was always TEA+ followed by 4-OBSA-. The reasons for the selectivity for the cation over the anion are discussed. 2006 Journal Article http://hdl.handle.net/20.500.11937/22822 10.1021/ac0521192 American Chemical Society restricted |
| spellingShingle | Berduque, A. Arrigan, Damien Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction |
| title | Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction |
| title_full | Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction |
| title_fullStr | Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction |
| title_full_unstemmed | Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction |
| title_short | Selectivity in the Coextraction of Cation and Anion by Electrochemically Modulated Liquid-Liquid Extraction |
| title_sort | selectivity in the coextraction of cation and anion by electrochemically modulated liquid-liquid extraction |
| url | http://hdl.handle.net/20.500.11937/22822 |