Journal ArticleDOI
Numerical analysis of electro-osmotic flow in soils
Roland W. Lewis,Chris Humpheson +1 more
TLDR
In this article, the solution of two-dimensional transient seepage problems under the influence of both electrokinetic and hydrodynamic forces is found using the finite element method.Abstract:
The solution of two-dimensional transient seepage problems under the influence of both electrokinetic and hydrodynamic forces is found using the finite element method. The governing differential equations account for both the time-dependent consolidation and the time-dependent storage of electricity of the soil media. Solutions to problems are primarily presented as the movement of the phreatic surface with time, but pore water velocities, hydraulic, and electric potentials at the nodes are also calculated in the program. A practical problem, where electroosmosis was used because normal dewatering methods have proven ineffective, was analyzed using the numerical model. The results obtained compared favorably with measurements made in the field. The main advantage of the numerical model is that the electrode configuration can easily be changed to enable the most efficient arrangement to be determined.read more
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Journal ArticleDOI
Impact of system chemistry on electroosmosis in contaminated soil
TL;DR: In this paper, an extended capillary model which includes nonuniform contributions to electroosmosis and pore pressures that vary with space and time, is developed and compared with experimental findings.
Journal Article
Impact of system chemistry on electroosmosis in contaminated soil. discussions and closure
G R Eykholt,D E Daniel +1 more
TL;DR: Agar and Alshawabkeh as discussed by the authors discuss adverse changes in electroosmosis may not necessarily affect transport of ionic species, since ion migration in the presence of the electric field is always dominant over ion migration due to advection.
Journal ArticleDOI
Electrokinetic Remediation. I: Pilot-Scale Tests with Lead-Spiked Kaolinite
TL;DR: The feasibility and efficiency of transporting lead under electric fields are investigated at pilot scale in three 1 t Georgia kaolinite specimens spiked with lead nitrate solution and at an electrode spacing of 72 cm as discussed by the authors.
Journal ArticleDOI
Electrokinetic Remediation. II: Theoretical Model
TL;DR: In this article, a mathematical model for multicomponent species transport under coupled hydraulic, electric, and chemical potential differences is presented, where mass balance of species and pore fluid together with charge balance across the medium result in a set of differential equations.
Journal ArticleDOI
Removal of contaminants from soils by electrokinetics: A theoretical treatise
TL;DR: In this paper, a theoretical model describing reactive solute transport is developed in a coupled system of differential/algebraic equations, considering the acid front developed by the anode reaction.