Recent progress on the application of capacitive deionization for wastewater treatment

Enas Taha Sayed, M. Obaid, A. G. Olabi, Mohammad Ali Abdelkareem*, Muaz Al Radi, Amer Al-Dawoud, Sameer Al-Asheh, Noreddine Ghaffour

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review


Capacitive deionization (CDI) is an emerging technology for removing charged ions from wastewater or aqueous solutions, where the charged ions interact electrostatically with the porous electrodes. Although recently, studies on CDI have increased significantly, the bulk of them is related to desalination (removing NaCl from water). So, it is highly recommended to highlight and discuss the CDI's capability to treat wastewater. This review summarizes the principles and application of CDI technology in wastewater treatment. The significant developments made on CDI for removing water containments such as radioactive minerals, heavy metals, nutrients, halides, hardness, and acids are highlighted. Then, CDI integrated or hybrid systems, such as co-precipitation, ultrafiltration, reverse electro-dialysis, electro deionization, and adsorption, for wastewater treatment and ion removal are reviewed and discussed. Finally, recommendations and future aspects for CDI development are presented.

Original languageEnglish (US)
Article number104379
JournalJournal of Water Process Engineering
StatePublished - Dec 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd


  • Capacitive deionization (CDI)
  • Flow-electrode capacitive deionization (FCDI)
  • Hybrid capacitive deionization (HCDI)
  • Hybrid wastewater treatment systems
  • Membrane capacitive deionization (MCDI)
  • Wastewater treatment

ASJC Scopus subject areas

  • Biotechnology
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Process Chemistry and Technology


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