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Zirconium-modified materials for selective adsorption and removal of aqueous arsenic

United States Patent

November 30, 2004
View the Complete Patent at the US Patent & Trademark Office
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A method, composition, and apparatus for removing contaminant species from an aqueous medium comprising: providing a material to which zirconium has been added, the material selected from one or more of zeolites, cation-exchangeable clay minerals, fly ash, mesostructured materials, activated carbons, cellulose acetate, and like porous and/or fibrous materials; and contacting the aqueous medium with the material to which zirconium has been added. The invention operates on all arsenic species in the form of arsenate, arsenite and organometallic arsenic, with no pretreatment necessary (e.g., oxidative conversion of arsenite to arsenate).
Zhao; Hongting (Longmont, CO), Moore; Robert C. (Edgewood, NM)
Sandia Corporation (Albuquerque, NM)
10/ 269,596
October 11, 2002
GOVERNMENT RIGHTS The Government has rights to this invention pursuant to Contract No. DE-AC04-94AL85000 awarded by the U.S. Department of Energy.