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Title: Electro-osmotic infusion for joule heating soil remediation techniques

Abstract

Electro-osmotic infusion of ground water or chemically tailored electrolyte is used to enhance, maintain, or recondition electrical conductivity for the joule heating remediation technique. Induced flows can be used to infuse electrolyte with enhanced ionic conductivity into the vicinity of the electrodes, maintain the local saturation of near-electrode regions and resaturate a partially dried out zone with groundwater. Electro-osmotic infusion can also tailor the conductivity throughout the target layer by infusing chemically modified and/or heated electrolyte to improve conductivity contrast of the interior. Periodic polarity reversals will prevent large pH changes at the electrodes. Electro-osmotic infusion can be used to condition the electrical conductivity of the soil, particularly low permeability soil, before and during the heating operation. Electro-osmotic infusion is carried out by locating one or more electrodes adjacent the heating electrodes and applying a dc potential between two or more electrodes. Depending on the polarities of the electrodes, the induced flow will be toward the heating electrodes or away from the heating electrodes. In addition, electrodes carrying a dc potential may be located throughout the target area to tailor the conductivity of the target area.

Inventors:
 [1];  [2]
  1. Tracy, CA
  2. Castro Valley, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
872623
Patent Number(s):
5975799
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B09 - DISPOSAL OF SOLID WASTE B09C - RECLAMATION OF CONTAMINATED SOIL
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electro-osmotic; infusion; joule; heating; soil; remediation; techniques; ground; water; chemically; tailored; electrolyte; enhance; maintain; recondition; electrical; conductivity; technique; induced; flows; infuse; enhanced; ionic; vicinity; electrodes; local; saturation; near-electrode; regions; resaturate; partially; dried; zone; groundwater; tailor; throughout; target; layer; infusing; modified; heated; improve; contrast; interior; periodic; polarity; reversals; prevent; ph; changes; condition; particularly; permeability; operation; carried; locating; adjacent; applying; dc; potential; depending; polarities; flow; addition; carrying; located; ground water; ionic conductivity; electrical conductivity; joule heating; chemically modified; ph changes; ph change; chemically tailored; electro-osmotic infusion; remediation techniques; electrodes adjacent; heating operation; remediation technique; /405/166/588/

Citation Formats

Carrigan, Charles R, and Nitao, John J. Electro-osmotic infusion for joule heating soil remediation techniques. United States: N. p., 1999. Web.
Carrigan, Charles R, & Nitao, John J. Electro-osmotic infusion for joule heating soil remediation techniques. United States.
Carrigan, Charles R, and Nitao, John J. Fri . "Electro-osmotic infusion for joule heating soil remediation techniques". United States. https://www.osti.gov/servlets/purl/872623.
@article{osti_872623,
title = {Electro-osmotic infusion for joule heating soil remediation techniques},
author = {Carrigan, Charles R and Nitao, John J},
abstractNote = {Electro-osmotic infusion of ground water or chemically tailored electrolyte is used to enhance, maintain, or recondition electrical conductivity for the joule heating remediation technique. Induced flows can be used to infuse electrolyte with enhanced ionic conductivity into the vicinity of the electrodes, maintain the local saturation of near-electrode regions and resaturate a partially dried out zone with groundwater. Electro-osmotic infusion can also tailor the conductivity throughout the target layer by infusing chemically modified and/or heated electrolyte to improve conductivity contrast of the interior. Periodic polarity reversals will prevent large pH changes at the electrodes. Electro-osmotic infusion can be used to condition the electrical conductivity of the soil, particularly low permeability soil, before and during the heating operation. Electro-osmotic infusion is carried out by locating one or more electrodes adjacent the heating electrodes and applying a dc potential between two or more electrodes. Depending on the polarities of the electrodes, the induced flow will be toward the heating electrodes or away from the heating electrodes. In addition, electrodes carrying a dc potential may be located throughout the target area to tailor the conductivity of the target area.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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