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. 07, 2004
Filed:
Jun. 28, 2002
Joseph Daniel Chwirka, Tijeras, NM (US);
CH2M Hill, Inc., , FL (US);
Abstract
A method of removing metal or metalloids, arsenic in particular, from groundwater or another source of contaminated water. The method comprises providing a water source, contacting the water source with CO , whereby the pH of the water source is lowered to produce pretreated water, contacting the pretreated water with a metal or metalloid complex-adsorbing substance whereby contaminants are separated from the remainder of the pretreated water to produce metal or metalloid-depleted water, and stripping the CO from the metal or metalloid-depleted water, whereby the pH of metal or metalloid-depleted water is increased. A system for metal removal utilizing the CO process is also provided.