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Title: Electrokinetic electrode system for extraction of soil contaminants from unsaturated soils

An electrokinetic electrode assembly is described 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. An electrode system and method are also revealed for extraction of soil contaminants. The system and method utilize at least two electrode assemblies as described above. 5 figs.
Inventors:
;
Issue Date:
OSTI Identifier:
87756
Assignee:
Sandia Corporation, Albuquerque, NM (United States) SNL; SCA: 540220; PA: EDB-95:119904; SN: 95001431582
Patent Number(s):
US 5,435,895/A/
Application Number:
PAN: 8-283,233
Contract Number:
AC04-76DP00789
Resource Relation:
Other Information: PBD: 25 Jul 1995
Research Org:
AT&T Corporation
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; SOILS; REMEDIAL ACTION; EXTRACTION APPARATUSES; DESIGN; POLLUTANTS; REMOVAL; IN-SITU PROCESSING; FLUID FLOW; TECHNOLOGY ASSESSMENT