Feasibility of Using Acetic Acid for Improving Electrokinetic Remediation

Award Information
Agency: Department of Defense
Branch: Army
Contract: N/A
Agency Tracking Number: 18382
Amount: $488,735.00
Phase: Phase II
Program: SBIR
Awards Year: 1993
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Electrokinetics, Inc.
Louisiana Business &, Technolog, Lsu, South Stadiu, Baton Rouge, LA, 70803
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert Marks
 (504) 388-3992
Business Contact
Phone: () -
Research Institution
N/A
Abstract
The basic scientific understanding acquired in development of electrokinetic remediation technology displays its potential in insitu removal of heavy metals, radionuclides and some organic chemicals from soils. One specific problem associated with the current processing technique is precipitation of the metal close to the cathode as a metal hydroxide. When this precipitate forms a lowly conductive salt, the electrical potential difference across the cell may increase decreasing the efficiency of removal and increasing the cost of remediation. There is a need to devise enhanced processing techniques to remove and/or avoid the precipitate close to the cathode. This study will investigate the use of acetic acid and/or ammonium acetate buffers to circumvent the encountered problem and enhance removal of metals in electrokinetic remediation. There are two advantages to using acetic acid in depolarizing the cathodic processes; (1) most metal acetates are highly soluble and the hydrogen ion is able to depoarize the cathodic electrlysis reaction thereby reducing the energy necessary in electrolysis and avoiding formation of the hydroxide species; (2) migration of an acetate anion upstream will cause formation of neutral acid and hence maintain a lower conductivity due to the association.

* information listed above is at the time of submission.

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