Please use this identifier to cite or link to this item: doi:10.22028/D291-30737
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Title: Dual‐Zinc Electrode Electrochemical Desalination
Author(s): Dai, Jinhong
Wang, Jian
Hou, Xianhua
Ru, Qiang
He, Qingyu
Srimuk, Pattarachai
Presser, Volker
Chen, Fuming
Language: English
Title: ChemSusChem : chemistry & sustainability, energy & materials
Volume: 13
Startpage: 1
Endpage: 8
Publisher/Platform: Wiley-VCH
Year of Publication: 2020
Publikation type: Journal Article
Abstract: Continuous and low-energy desalination technologies are in high demand to enable sustainable water remediation. Our work introduces a continuous desalination process based on the redox reaction of a dual-zinc electrode. The system consists of two zinc foils as redox electrodes with flowing ZnCl2 electrolyte, concentrated and diluted salt streams with three anion- and cation-exchange membranes (AEM and CEM) separated configuration (AEM|CEM|AEM). If a constant current is applied, the negative zinc electrode is oxidized, and electrons are released to the external circuit, whereas the positive zinc electrode is reduced, causing salt removal in the dilution stream. The results showed that brackish water can be directly desalted to 380.6 ppm during a continuous batch-mode process. The energy consumption can be as low as 35.30 kJ mol-1 at a current density of 0.25 mA cm-2 , which is comparable to reverse osmosis. In addition, the dual-zinc electrode electrochemical desalination demonstrates excellent rate performance, reversibility, and batch cyclability through electrode exchange regeneration. Our research provides a route for continuous low-energy desalination based on metal redox mediators.
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Link to this record: hdl:20.500.11880/29041
ISSN: 1864-564X
Date of registration: 22-Apr-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Volker Presser
Collections:UniBib – Die Universitätsbibliographie

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