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Updated: Jul 11, 2025
08:06
Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
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Advanced capacitive deionization for ion selective separation: Insights into mechanism over a functional
Xiaoqi Sun1, Zewei Hao1, Xuefei Zhou1
1State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
Chemosphere
|November 2, 2023
Summary
Capacitive deionization (CDI) offers promising selective ion removal from polluted water. This review explores CDI
Area of Science:
- Environmental Science
- Materials Science
- Electrochemistry
Background:
- Selective ion removal is crucial for water purification and resource recovery.
- Capacitive deionization (CDI) is an emerging technology with potential for selective ion separation due to its low energy consumption and simple operation.
- Existing research on CDI ion selectivity needs further analysis, particularly regarding opposite selectivity phenomena and detailed chemical reaction mechanisms.
Purpose of the Study:
- To review recent advancements in CDI technologies for selective ion separation.
- To explore the mechanisms of selective ion separation in CDI, including physical adsorption, chemical reactions, and selective barriers.
- To provide insights into chemical bond formation and ion conversion pathways during ion-electrode interactions.
Main Methods:
- Literature review of recent progress in CDI for ion selective separation.
- Analysis of selective separation mechanisms from physical adsorption, chemical reaction, and selective barrier perspectives.
- Detailed examination of chemical bond formation and ion conversion pathways in electrode-ion interactions.
Main Results:
- Summarized recent progress in CDI technologies for selective ion separation.
- Explored selective separation mechanisms including physical adsorption, specific chemical reactions (hydrogen bonds, complexation, ligand exchange), and selective barriers.
- Detailed the formation of chemical bonds and ion conversion pathways between ions and electrode materials.
Conclusions:
- CDI shows significant potential for selective ion separation in water treatment.
- Understanding chemical reaction mechanisms is key to optimizing CDI selectivity.
- Future research should focus on developing advanced CDI systems with enhanced selectivity and exploring new materials and mechanisms.
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