Electrically regenerated ion-exchange technology: Leveraging faradaic reactions and assessing the effect of co-ion sorption
Abstract
Capacitive deionization (CDI) technologies have the potential to become cost-competitive alternatives to reverse osmosis for the treatment of brackish waters. In this study, we describe our findings on the effect of co-ion sorption and faradaic side reactions on our ion exchange resin functionalized desalination electrodes which passively capture salt and reject it upon charging. This system, which we previously reported on and refer to as electrically regenerated ion exchange (ERI), avoids the use of expensive ion exchange membranes in an effort to save costs. Surprisingly, we find that, compared to a reference CDI system, ERI electrodes capture salt most effectively at low applied voltages (0.5 mg/cm3 at 0.8 V). Both CDI and ERI systems also seem to suffer from co-ion sorption effects which negatively impact salt adsorption. However, Faradaic side reactions at higher voltages (1 V and 1.2 V) which we track via pH measurements, serve as a detriment to CDI but seem to facilitate the functionality of ERI.
- Authors:
-
[1];
[2];
[1];
[2];
[1]
- Univ. of California, Berkeley, CA (United States)
- National Taiwan Univ., Taipei (Taiwan)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); U.S.-China Clean-Energy Research Center. Water Energy Technologies; USAID Global Development Lab and Higher Education Solutions Network; the Ministry of Science and Technology, Taiwan
- OSTI Identifier:
- 1869286
- Grant/Contract Number:
- AC02-05CH11231; IA0000018; AID-OAA-A-13-00002; 109- 2223-E-002-002-MY3; 106WMRFA0100033
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Colloid and Interface Science
- Additional Journal Information:
- Journal Volume: 623; Journal ID: ISSN 0021-9797
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; Capacitive deionization; Brackish groundwater desalination; Ion exchange resin; Electrically regenerative ion exchange
Citation Formats
Hackl, Lukas, Tsai, Shao-Wei, Kalyan, Bavisha, Hou, Chia-Hung, and Gadgil, Ashok. Electrically regenerated ion-exchange technology: Leveraging faradaic reactions and assessing the effect of co-ion sorption. United States: N. p., 2022.
Web. doi:10.1016/j.jcis.2022.05.104.
Hackl, Lukas, Tsai, Shao-Wei, Kalyan, Bavisha, Hou, Chia-Hung, & Gadgil, Ashok. Electrically regenerated ion-exchange technology: Leveraging faradaic reactions and assessing the effect of co-ion sorption. United States. https://doi.org/10.1016/j.jcis.2022.05.104
Hackl, Lukas, Tsai, Shao-Wei, Kalyan, Bavisha, Hou, Chia-Hung, and Gadgil, Ashok. Mon .
"Electrically regenerated ion-exchange technology: Leveraging faradaic reactions and assessing the effect of co-ion sorption". United States. https://doi.org/10.1016/j.jcis.2022.05.104. https://www.osti.gov/servlets/purl/1869286.
@article{osti_1869286,
title = {Electrically regenerated ion-exchange technology: Leveraging faradaic reactions and assessing the effect of co-ion sorption},
author = {Hackl, Lukas and Tsai, Shao-Wei and Kalyan, Bavisha and Hou, Chia-Hung and Gadgil, Ashok},
abstractNote = {Capacitive deionization (CDI) technologies have the potential to become cost-competitive alternatives to reverse osmosis for the treatment of brackish waters. In this study, we describe our findings on the effect of co-ion sorption and faradaic side reactions on our ion exchange resin functionalized desalination electrodes which passively capture salt and reject it upon charging. This system, which we previously reported on and refer to as electrically regenerated ion exchange (ERI), avoids the use of expensive ion exchange membranes in an effort to save costs. Surprisingly, we find that, compared to a reference CDI system, ERI electrodes capture salt most effectively at low applied voltages (0.5 mg/cm3 at 0.8 V). Both CDI and ERI systems also seem to suffer from co-ion sorption effects which negatively impact salt adsorption. However, Faradaic side reactions at higher voltages (1 V and 1.2 V) which we track via pH measurements, serve as a detriment to CDI but seem to facilitate the functionality of ERI.},
doi = {10.1016/j.jcis.2022.05.104},
journal = {Journal of Colloid and Interface Science},
number = ,
volume = 623,
place = {United States},
year = {Mon May 23 00:00:00 EDT 2022},
month = {Mon May 23 00:00:00 EDT 2022}
}
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