Electrokinetic electrode system for extraction of soil contaminants from unsaturated soils

Patent · Sun Jan 01 00:00:00 EST 1995

OSTI ID:869998

Lindgren, Eric R ^[1]; Mattson, Earl D ^[1]

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1. Albuquerque, NM

There is presented an electrokinetic electrode assembly for use in extraction of soil contaminants from unsaturated soil in situ. The assembly includes a housing for retaining a liquid comprising an electrolyte solution, pure water, and soil water, the housing being in part of porous material capable of holding a vacuum. An electrode is mounted in the housing. The housing is provided with a vacuum orifice for effecting a vacuum within the housing selectively to control flow of soil water through the housing into the chamber and to control outflow of the liquid from the chamber. The assembly further includes conduit means for removing the liquid from the housing and returning the electrolyte solution to the housing, and a conduit for admitting pure water to the housing. There is further presented an electrode system and method for extraction of soil contaminants, the system and method utilizing at least two electrode assemblies as described above.

• Research Organization: AT&T
• DOE Contract Number: AC04-76DP00789
• Assignee: Sandia Corporation (Albuquerque, NM)
• Patent Number(s): US 5435895
• OSTI ID: 869998
• Country of Publication: United States
• Language: English

Related Subjects

electrokinetic
electrode
extraction
soil
contaminants
unsaturated
soils
assembly
situ
housing
retaining
liquid
comprising
electrolyte
solution
pure
water
porous
material
capable
holding
vacuum
mounted
provided
orifice
effecting
selectively
control
flow
chamber
outflow
conduit
means
removing
returning
admitting
method
utilizing
assemblies
described
electrode assembly
porous material
conduit means
electrolyte solution
control flow
method utilizing
material capable
pure water
soil water
soil contaminants
electrokinetic electrode
oil water
unsaturated soil
electrode assemblies
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