Pulsed EC Electric Fields for Heavy Metal Decontamination of Soil

Award Information
Agency: Department of Defense
Branch: Army
Contract: N/A
Agency Tracking Number: 18381
Amount: $715,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1993
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
111 East 27th Street, Suite, 204, Bryan, TX, 77803
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dalibor Hodko
 (409) 822-3149
Business Contact
Phone: () -
Research Institution
N/A
Abstract
The removal of heavy metals and/or radionuclides from contaminated subsurface soils and groundwaters is an expensive and time-consuming part of any contaminated site-cleanup process. Development of new techniques for soil remediation is particularly needed for contaminated sites on which nuclear facilities are located. Many remediation methods investigated have been found to be less than satisfactory due to a combination of their short- and/or long-term ineffectiveness, low removal rates of toxic elemental species and high implementation costs. Decontamination of soil using pulsed DC electric fields is a new novel approach for hazardous waste site remediation based on electrochemically induced transport of contaminants through the soil. This technique has the potential to be effective in facilitating the removal of certain types of hazardous wastes from soils, particularly heavy metals. The objective of this proposal is to evaluate the feasibility of electrochemically based remediation technology for removal of heavy metal contaminants from soil and to implement an innovative approach based on the application of pulsed DC electric fields, in combination with periodic pumping. It is anticipated that increasing the turbulence in the soil/contaminant/water system, both by application of an "electrochemical stirring" of the soil and by forced hydraulic flow, will increase the rate of removal of contaminants. Different long-term pulsing-type regimes, including increasing voltage amplitudes and voltage reversals, combined with intermittent pumping, will be investigated in order to enhance the effectiveness of the electrochemically based remediation process.

* Information listed above is at the time of submission. *

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