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Physicochemical and Hydrodynamics Aspects of Electrokinetics in Soil Remediation

Title: Physicochemical and Hydrodynamics Aspects of Electrokinetics in Soil Remediation: A Study Based on Fundamental Principles and Modeling Approaches.
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Name(s): Oyanader-Rivera, Mario A., author
Dzurik, Andrew, professor co-directing dissertation
Arce, Pedro E., professor co-directing dissertation
Chan-Hilton, Amy, committee member
Wesson, Dale, outside committee member
Department of Civil and Environmental Engineering, degree granting department
Florida State University, degree granting institution
Type of Resource: text
Genre: Text
Issuance: monographic
Date Issued: 2004
Publisher: Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The presence of contaminant sites on the earth's surface is quite common and the need for their cleaning is huge and urgent. From the many technology efforts made to avoid the spreading of contaminants such as heavy metals the application of an electrical field on a soil matrix has given encouraging results. Several reports have described the goodness of electrokinetic-remediation as follows: it can be applied in situ, no excavation is necessary, it targets specific contaminants, and it works in low permeability soils. In fact, these are the reasons why applying electrical fields has been one technology pathway that has received so much attention in recent years. Although electrokinetic soil remediation has remained a promising technology, the drawbacks in field tests have suggested that fundamental research is still needed to fully understand the process. In effect, the analysis of the porosity, in conjunction with a more realistic set of transport forces, i.e. electroosmosis, electromigration, buoyancy and advection, is still missing in the literature and therefore it is the subject matter of this research. Consequently, this work concentrates on the analysis and comparison of predictions of at least three main aspects of electroremediation, i.e., heat transfer, electrostatics, and hydrodynamics. Overall, the comparison of transport forces is based on the use of different geometrical models to bring the role of porous media aspect and electrode shape into the analysis. Additionally, a new solution strategy is proposed for the differential equations of the electrostatic potential based on the Debye-Hückel approximation. From the study, the collected information is useful to identify further efforts to be made in investigation and to delineate a systematic approach for a more rigorous description of the electroremediation process. Implications for design of devices and cleaning strategies are also included. The knowledge obtained in this analysis is useful to promote a deeper understanding of the behavior of the system, and to lead to important guidelines for improving cleaning efficiency in a given application.
Identifier: FSU_migr_etd-2432 (IID)
Submitted Note: A Dissertation Submitted to the Department of Civil and Environmental Engineering in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy.
Degree Awarded: Spring Semester, 2004.
Date of Defense: March 5, 2004.
Keywords: Electrokinetics, Modeling, Soil Remediation, Hydrodynamics
Bibliography Note: Includes bibliographical references.
Advisory Committee: Andrew Dzurik, Professor Co-Directing Dissertation; Pedro E. Arce, Professor Co-Directing Dissertation; Amy Chan-Hilton, Committee Member; Dale Wesson, Outside Committee Member.
Subject(s): Civil engineering
Environmental engineering
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_etd-2432
Owner Institution: FSU

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Oyanader-Rivera, M. A. (2004). Physicochemical and Hydrodynamics Aspects of Electrokinetics in Soil Remediation: A Study Based on Fundamental Principles and Modeling Approaches. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-2432