Electrokinetic electrode system for extraction of soil contaminants from unsaturated soils

Patent · Sat Dec 31 23:00:00 EST 1994

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 CORP
• 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

/204/588/
admitting
assemblies
assembly
capable
chamber
comprising
conduit
conduit means
contaminants
control
control flow
described
effecting
electrode
electrode assemblies
electrode assembly
electrokinetic
electrokinetic electrode
electrolyte
electrolyte solution
extraction
flow
holding
housing
liquid
material
material capable
means
method
method utilizing
mounted
oil water
orifice
outflow
porous
porous material
provided
pure
pure water
removing
retaining
returning
selectively
situ
soil
soil contaminants
soil water
soils
solution
unsaturated
unsaturated soil
utilizing
vacuum
water