Methods for removing contaminants from water and silica from...

Details Methods for removing contaminants from water and silica from... Methods for removing contaminants from water and silica from...

2006-12-26

2006-12-26

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S673000, C210S688000

Reexamination Certificate

active

07153434

ABSTRACT:
The method for removing silicon dioxide from a contaminant-removal media bed comprises adding a scrub solution containing an acidic solution of sodium fluoride to a media bed containing silicon dioxide. The scrub solution is allowed to remove the silicon dioxide before the scrub solution is removed from the bed.

REFERENCES:
patent: 4056146 (1977-11-01), Hall
patent: 5403495 (1995-04-01), Kust et al.
patent: 5965027 (1999-10-01), Allen et al.
patent: 6200482 (2001-03-01), Winchester et al.
Waltham, Catherine and Eick, Matthew, Kinetics of Arsenic Adsorption on Goethite in the Presence of Sorbed Silicic Acid, Soil Science Society of America Journal, May 2002, 66:818-825 (2002), USA.

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