Modeling of the Ionic Multi-Species Transport Phenomena in Electrokinetic Processes and Comparison with Experimental Results

Juan Manuel Paz-Garcia, Björn Johannesson, Lisbeth M. Ottosen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A model to predict the transport of ionic species within the pore solution of porous materials, under the effect of an external electric field has been developed. A Finite Elements method was implemented and used for the integration of the Nernst-Plank equations for each ionic species considered. Electrical neutrality was continuously assured in the model by the inclusion of the Poisson-Boltzmann equation to the system of governing equations. Voltage differences were applied across the sample as boundary conditions in order to evaluate the competition between diffusion and electromigration terms in the transport process. As a modification of a previous work, water equilibrium was reestablished between iterations in the numerical method and the pH value monitored. Simulations were conducted in order to visualize the acid and basic fronts advance, and to evaluate the use of a buffer substance in the electrode compartments. Simulations were compared with lab scale results for desalination experiments, where an inert matrix of sandstone was used to minimize the effect of chemical reactions in the process.
Original languageEnglish
Title of host publicationScientific Advances and Innovative Applications in Electrokinetic Remediation
EditorsGordon C.C. Yang
Place of PublicationTaiwan
Publication date2010
Pages69-70
ISBN (Print)978-986-02-4012-2
Publication statusPublished - 2010
Event9th Symposium in Electrokinetic Remediation - Kaohsiung, Taiwan, Province of China
Duration: 27 Jun 201030 Jun 2010
Conference number: 9

Conference

Conference9th Symposium in Electrokinetic Remediation
Number9
CountryTaiwan, Province of China
CityKaohsiung
Period27/06/201030/06/2010

Keywords

  • Electrokinetics, Finite Elements Method, Electromigration, Numerical Model, Transport Process

Cite this

Paz-Garcia, J. M., Johannesson, B., & Ottosen, L. M. (2010). Modeling of the Ionic Multi-Species Transport Phenomena in Electrokinetic Processes and Comparison with Experimental Results. In G. C. C. Yang (Ed.), Scientific Advances and Innovative Applications in Electrokinetic Remediation (pp. 69-70). Taiwan.