The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 1993
Filed:
Jan. 29, 1992
Applicant:
Inventors:
Hsueh-Rong Chang, Scotia, NY (US);
Tah-Mun Su, Schenectady, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25C / ;
U.S. Cl.
CPC ...
204130 ; 2041822 ; 2041801 ;
Abstract
In-situ extraction of contaminants, such as PCBs, from soil is achieved by an electroosmosis technique. The soil is treated with a low concentration surfactant solution used as a purging liquid. The contaminant is dissolved in the ground water, aided by the purging liquid. An electric field is applied to a region of the soil causing the ground water, contaminant and surfactant to move by electroosmosis to a collection point where the purging liquid, dissolved contaminant and surfactant are collected and removed from the soil. This method may also be used to control the direction of seepage of the contaminants.