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Anion Effect on Forward Osmosis Performance of Tetrabutylphosphonium-Based Draw Solute Having a Lower Critical Solution Temperature.
| Content Provider | Europe PMC |
|---|---|
| Author | Moon, Jihyeon Kang, Hyo |
| Editor | Khalil, Ahmed M. |
| Copyright Year | 2023 |
| Abstract | The applicability of ionic liquids (ILs) as the draw solute in a forward osmosis (FO) system was investigated through a study on the effect of the structural change of the anion on the FO performance. This study evaluated ILs composed of tetrabutylphosphonium cation ([P4444]+) and benzenesulfonate anion ([BS]−), para-position alkyl-substituted benzenesulfonate anions (p-methylbenzenesulfonate ([MBS]−) and p-ethylbenzenesulfonate ([EBS−]), and methanesulfonate anion ([MS]−). The analysis of the thermo-responsive properties suggested that the [P4444][MBS] and [P4444][EBS] ILs have lower critical solution temperatures (LCSTs), which play a beneficial role in terms of the reusability of the draw solute from the diluted draw solutions after the water permeation process. At 20 wt% of an aqueous solution, the LCSTs of [P4444][MBS] and [P4444][EBS] were approximately 36 °C and 25 °C, respectively. The water flux and reverse solute flux of the [P4444][MBS] aqueous solution with higher osmolality than [P4444][EBS] were 7.36 LMH and 5.89 gMH in the active-layer facing the draw solution (AL-DS) mode at osmotic pressure of 25 atm (20 wt% solution), respectively. These results indicate that the [P4444]+-based ionic structured materials with LCST are practically advantageous for application as draw solutes. |
| Volume Number | 13 |
| PubMed Central reference number | PMC9959785 |
| Issue Number | 2 |
| PubMed reference number | 36837713 |
| Journal | Membranes (Basel) |
| e-ISSN | 20770375 |
| DOI | 10.3390/membranes13020211 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2023-02-08 |
| Access Restriction | Open |
| Rights License | 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/). © 2023 by the authors. |
| Subject Keyword | ionic liquid forward osmosis draw solution water treatment lower critical solution temperature |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemical Engineering Process Chemistry and Technology Filtration and Separation |
