Topic Editors

School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
Dr. Xin Zhang
School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA

Capacitive Deionization Technology for Water Treatment

Abstract submission deadline
30 June 2024
Manuscript submission deadline
30 September 2024
Viewed by
5914

Topic Information

Dear Colleagues,

Capacitive deionization (CDI) is an emerging water purification technology, where the direct voltage applied on the electrodes enables ions or charged particles to form electric double layers (EDLs) on the surface of electrodes for the purpose of water purification. At present, capacitive deionization has been widely used in industrial, agricultural, and domestic water desalination and seawater desalination. The advantages of CDI are characterized by low energy consumption, environmental friendliness, high adsorption efficiency, and easy operation.

In addition to research on the adsorption efficiency of CDI, another fundamental research challenge, still unresolved as of today, is how to improve the adsorption selectivity of CDI—a challenge closely related to the separation, purification, and enrichment of ions in complex solutions.

Prof. Dr. Shenxu Bao
Dr. Xin Zhang
Topic Editors

Keywords

  • capacitive deionization
  • electric double layers
  • adsorption selectivity
  • desalination
  • separation
  • enrichment

Participating Journals

Journal Name Impact Factor CiteScore Launched Year First Decision (median) APC
AppliedChem
appliedchem
- - 2021 17.2 Days CHF 1000 Submit
ChemEngineering
ChemEngineering
2.5 4.7 2017 17.2 Days CHF 1600 Submit
Energies
energies
3.2 5.5 2008 16.1 Days CHF 2600 Submit
Membranes
membranes
4.2 4.4 2011 13.6 Days CHF 2700 Submit
Processes
processes
3.5 4.7 2013 13.7 Days CHF 2400 Submit
Recycling
recycling
4.3 5.4 2016 20 Days CHF 1800 Submit
Separations
separations
2.6 2.5 2014 13.6 Days CHF 2600 Submit
Water
water
3.4 5.5 2009 16.5 Days CHF 2600 Submit

Preprints.org is a multidiscipline platform providing preprint service that is dedicated to sharing your research from the start and empowering your research journey.

MDPI Topics is cooperating with Preprints.org and has built a direct connection between MDPI journals and Preprints.org. Authors are encouraged to enjoy the benefits by posting a preprint at Preprints.org prior to publication:

  1. Immediately share your ideas ahead of publication and establish your research priority;
  2. Protect your idea from being stolen with this time-stamped preprint article;
  3. Enhance the exposure and impact of your research;
  4. Receive feedback from your peers in advance;
  5. Have it indexed in Web of Science (Preprint Citation Index), Google Scholar, Crossref, SHARE, PrePubMed, Scilit and Europe PMC.

Published Papers (2 papers)

Order results
Result details
Journals
Select all
Export citation of selected articles as:
16 pages, 13903 KiB  
Article
Research on CeO2 Activated Carbon Electrode Capacitance Method for Sulfate Removal from Mine Water
by Xiujuan Feng, Yanjun Zou, Sékou Mohamed Condé, Xiaoqing Wang and Chengliang Dong
Water 2024, 16(5), 675; https://doi.org/10.3390/w16050675 - 25 Feb 2024
Viewed by 702
Abstract
Sulfate is a typical characteristic pollutant in mine water. Because of its high concentration and large discharge of mine water, it has become a difficult problem in mineral exploitation. Capacitive deionization (CDI) is an innovative and economical removal technology. There are few reports [...] Read more.
Sulfate is a typical characteristic pollutant in mine water. Because of its high concentration and large discharge of mine water, it has become a difficult problem in mineral exploitation. Capacitive deionization (CDI) is an innovative and economical removal technology. There are few reports on the use of CDI to remove SO42− from mine water. In this study, a CeO2 activated carbon electrode with good wettability, excellent electrochemical performance, and suitable pore structure was prepared by the sol-gel method. The application of the CeO2 activated carbon electrode to the capacitive method for treating high SO42− mine water was investigated using simulated wastewater and actual mine water. The study structure shows that CeO2:activated carbon (AC) has the best wettability, the highest specific capacitance, and the lowest electrical conductivity when the mass ratio of CeO2 is 5%. At 100 mg/L, the electrode has the maximum SO42− ion specific adsorption capacity (SAC). At 1 V and 20 mL/min, this value is measured. The electrode has a SAC value of 9.36 mg/g, far higher than the AC electrode’s 4.1 mg/g. The effect of CDI process factors such the voltage, flow rate, and initial concentration was studied to find the best treatment method. SAC retention is 91% after 10 adsorption–desorption cycles, demonstrating outstanding electrode performance. Under the best CDI process (1.4 volts, 30 mL/min), mine water was treated. After 20 cycles of treatment, the concentration of SO42− in mine water decreased from 1170 mg/L to 276.46 mg/L, and the removal rate was 76.37%. This study proved that the CeO2 modified activated carbon electrode capacitance method can effectively remove sulfate ions and other ions from mine water. Full article
(This article belongs to the Topic Capacitive Deionization Technology for Water Treatment)
Show Figures

Figure 1

24 pages, 3852 KiB  
Review
Application of Capacitive Deionization in Water Treatment and Energy Recovery: A Review
by Shenxu Bao, Chunfu Xin, Yimin Zhang, Bo Chen, Wei Ding and Yongpeng Luo
Energies 2023, 16(3), 1136; https://doi.org/10.3390/en16031136 - 19 Jan 2023
Cited by 27 | Viewed by 4247
Abstract
Water resources are the basis for human survival and development. However, human beings face severe challenges of water pollution and freshwater shortage. With the critical advantages of low energy consumption, high efficiency, low cost, green and pollution-free, and renewable electrodes, capacitive deionization (CDI) [...] Read more.
Water resources are the basis for human survival and development. However, human beings face severe challenges of water pollution and freshwater shortage. With the critical advantages of low energy consumption, high efficiency, low cost, green and pollution-free, and renewable electrodes, capacitive deionization (CDI) has become an up-and-coming water treatment technology. After decades of development, the application of CDI has expanded from seawater desalination to many fields. However, the existing literature still needs a comprehensive overview of the multi-functional application of CDI technology in water treatment. Therefore, our work critically reviewed the latest research progress of CDI in water treatment to meet the technical requirements of various application fields. This paper first summarizes the various applications of CDI in water treatment, focusing on CDI’s representative research results in heavy metal removal, organic contaminants removal, water softening, phosphate and nitrate removal, and water disinfection. In addition, we also discussed the latest research progress of energy recovery and energy consumption assessment for the CDI process. Finally, this paper discusses the challenges and future opportunities facing CDI technology. Full article
(This article belongs to the Topic Capacitive Deionization Technology for Water Treatment)
(This article belongs to the Section B: Energy and Environment)
Show Figures

Figure 1

Back to TopTop