Preliminary Investigation on the Optimization of Adsorption/Desorption Performance and Operating Parameters of Capacitive Deionization with Carbon Aerogel as Electrodes and the Effect of Surface Treatment with TiO₂/ZnO


Carbon based electrodes have been a popular choice among researchers to be used in capacitive deionization (CDI) cell because of the porous structure, high electrical conductivity and high surface area. These properties increased the effectiveness of CDI process by facilitating mass transport and adsorption of ions. Furthermore, regenerating exhausted electrodes through desorption process helps in reducing overall cost of the process. The efficiency of the CDI process can also be increased by modification of electrodes with metal or metal oxides of appropriate zeta potential. This study also explores ion removal and regeneration efficiency of carbon aerogel electrodes (unmodified and modified with TiO2/ZnO) under different conditions, achieved by varying experimental parameters such as flow speeds over electrode surface, temperature, ionic concentration and applied voltage. The modified surface of electrodes is being investigated for surface morphology, elemental analysis, cross-sections of coatings deposit, microstructures, thickness, pore size, and surface area.

Meeting Name

16th World Environmental and Water Resources Congress 2016: Professional Development, Innovative Technology, International Perspectives, and History and Heritage (2016: May 22-26, West Palm Beach, FL)


Civil, Architectural and Environmental Engineering


The project is funded by Louisiana Board of Regents and NSF EPSCoR through OPT-IN grant.

Keywords and Phrases

Aerogels; Efficiency; Electrodes; Environmental technology; Innovation; Pore size; Surface treatment, Adsorption/desorption; Capacitive deionization; Carbon aerogel electrodes; Carbon-based electrodes; Experimental parameters; High electrical conductivity; Operating parameters; Regeneration efficiency, Water resources

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


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© 2016 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 May 2016

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