In-Situ Electrokinetic Remediation of Metal Contaminated Soils Technology Status Report
ARMY ENVIRONMENTAL CENTER ABERDEEN PROVING GROUND MD
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Electrokinetic remediation is an in-situ process in which an electrical field is created in a soil matrix by applying a low-voltage direct current DC to electrodes placed in the soil. As a result of the application of this electric field, heavy metal contaminants may be mobilized, concentrated at the electrodes, and extracted from the soil. Many vendors have marketed the potential of electrokinetic remediation for metals contaminated soils however, no large-scale field demonstrations had been conducted. Issues such as control of contaminant movement, ability to achieve cleanup goals, byproduct formation, treatment effects on the soil matrix, etc. had not been addressed. Interest in electrokinetic remediation has been driven by the demand for technologies that are cost effective and will eliminate the long-term liability that is incurred by landfilling of contaminants. This report provides an overview of the current developmental status of electrokinetic remediation for metals contaminated soils. Concerns with its in situ application and issues that require further investigation are identified. The results of a field demonstration conducted at Naval Air Weapons Station NAWS Point Mugu are presented to illustrate the concerns with the in situ application of this technology at its current stage of development.
- Electricity and Magnetism
- Environmental Health and Safety