Cathleen J Webb

US Patent:

20060186054, Aug 24, 2006

Filed:

Nov 21, 2005

Appl. No.:

11/284440

Inventors:

Cathleen Webb - Bowling Green KY, US
Arden Davis - Rapid City SD, US
David Dixon - Rapid City SD, US

International Classification:

C02F 1/28

US Classification:

210688000, 210681000

Abstract:

The present invention relates to a method for removing arsenic in arsenic contaminated water, especially for small drinking water systems such as those used in individual homes, rural areas, and small communities, by simply contacting arsenic-contaminated water with an arsenic removal medium. The present invention also relates to the composition of the arsenic removal medium, which comprises particles of calcium carbonate minerals and magnesium carbonate aggregates.

US Patent:

20120145640, Jun 14, 2012

Filed:

Oct 14, 2011

Appl. No.:

13/274140

Inventors:

Arden D. DAVIS - Rapid City SD, US
Cathleen J. Webb - Bowling Green KY, US
Jenifer Sorensen - Rapid City SD, US
Terrence E. Williamson - Rapid City SD, US
David J. Dixon - Rapid City SD, US

International Classification:

C02F 1/62
C02F 1/64
B01J 20/04
C01F 11/18
C09K 3/00
B01J 20/02
B01D 15/04
C01B 31/00

US Classification:

210688, 210681, 4234191, 423430, 252184, 502400

Abstract:

The present invention relates to a method for removing heavy metals from aqueous solutions by contacting heavy metal-contaminated water with a sorption media, or in particular with carbonate minerals. The present invention also relates to methods of using modified sorption media, such as aggregates of carbonate minerals and modified carbonate minerals, for the removal of heavy metals.