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:
Sep. 11, 2001
Filed:
Apr. 16, 1998
Applicant:
Inventors:
Robert W Gillham, Guelph, CA;
Marek S Odziemkowski, Kitchener, CA;
Stephanie F O'Hannesin, Guelph, CA;
Assignee:
University of Waterloo, Waterloo, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 7/00 ; C02F 1/70 ;
U.S. Cl.
CPC ...
C02F 7/00 ; C02F 1/70 ;
Abstract
Groundwater, or other water contaminated with chlorinated organic contaminants, is passed through a permeable body of iron particles. The particles are coated with nickel, but the coating is incomplete, in that, in patches, the iron is directly exposed. The contaminants break down under prolonged proximity to the iron, the nickel enhancing the catalytic effect. The rate of breakdown is much faster than when bare iron particles were used. When the nickel is alloyed with phosphorus, or boron, even more rapid breakdown rates are achieved.