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Published on: July 20, 2021
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A review on recent advances in electrodeionization for various environmental applications
B Senthil Rathi1, P Senthil Kumar2, R Parthiban2
1Department of Chemical Engineering, St. Joseph's College of Engineering, Chennai, 600119, India.
Chemosphere
|December 13, 2021
Summary
Continuous electrodeionization (CEDI) offers an efficient, green solution for removing ionic pollutants from water. This technology uses electricity instead of chemicals, reducing wastewater and improving on traditional methods.
Area of Science:
- Environmental Science and Engineering
- Water Treatment Technologies
- Electrochemistry
Background:
- Growing ecosystem contamination demands sustainable pollution removal solutions.
- Traditional ion exchange methods face limitations like chemical usage and ion dumping.
- Electrodeionization (EDI) emerges as a promising alternative for ionic contaminant removal.
Purpose of the Study:
- To comprehensively review the theory, principles, and mechanisms of ion movement in electrodeionization units.
- To investigate the construction, application, and recent advancements in electrodeionization for water treatment, particularly heavy metal removal.
- To explore future trends and potential for industrial scale-up of electrodeionization systems.
Main Methods:
- Literature review of electrodeionization theory, principles, and mechanisms.
- Analysis of electrodeionization unit construction and operational applications.
- Investigation of recent technological developments and hybrid processes involving electrodeionization.
Main Results:
- Electrodeionization effectively removes ionic chemicals, including heavy metals, from polluted water.
- Continuous electrodeionization (CEDI) is a greener alternative, utilizing electric power over toxic chemicals for resin regeneration.
- Recent advances include polarity reversal, resin wafer, membrane-free, and electrostatic shielding techniques.
Conclusions:
- Electrodeionization addresses drawbacks of conventional ion exchange, offering efficient and environmentally friendly water purification.
- Ongoing advancements promise improved efficacy and reduced energy consumption, making CEDI attractive for industrial applications.
- Further development is expected to enhance cost-effectiveness and broaden the global applicability of electrodeionization.
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