An innovative flow-electrode comprising redox-active quinones to enhance the effectiveness of water desalination using flow-electrode capacitive deionization (FCDI) is described in this study. Results show that, in addition to carbon particle contact, the presence of the aqueous hydroquinone (H<sub>2</sub>Q)/benzoquinone (Q) couple in a flowing suspension of carbon particles enhances charge transfer significantly as a result of reversible redox reactions of H<sub>2</sub>Q/Q. Ion migration through the micropores of the flow-electrodes was facilitated in particular with the desalination rate significantly enhanced. The cycling behavior of the quinoid mediators in the anode flow-electrode demonstrated relatively high stability at the low pH induced, suggesting that the mediator would be suitable for long-term operation

Salt removal from brackish waters by redox-active flow-electrode capacitive deionization (FCDI)

254th National Meeting (2017)

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