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Office of Scientific and Technical Information
 

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

Patent ·
OSTI ID:1175155
;
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).
Research Organization:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation
Patent Number(s):
6,824,690
Application Number:
10/269,596
OSTI ID:
1175155
Country of Publication:
United States
Language:
English

References (16)

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Removal of Arsenite from Aqueous Solutions by Anionic Clays journal December 2001
Arsenic in drinking water-problems and solutions journal July 1999
Separation of arsenic species in aqueous solutions and optimization of determination by graphite furnace atomic absorption spectrometry journal August 2000
Pillared clays : preparation and characterization of zirconium pillared montmorillonite journal October 1992
Simultaneous determination of Se and As by hydride generation atomic absorption spectrometry with analyte concentration in a graphite furnace coated with zirconium journal November 1995
A thermal study of Zr-pillared montmorillonite journal December 1998
Removal of Arsenite from Aqueous Solutions by Anionic Clays journal December 2001
Preparation of porous resin loaded with crystalline hydrous zirconium oxide and its application to the removal of arsenic journal February 2000
Comparison of different chemical modifiers for the direct determination of arsenic in sea water by electrothermal atomic absorption spectrometry journal May 1996
High Surface Area Solids Obtained by Reaction of Montmorillonite with Zirconyl Chloride journal January 1979
Preconcentration method for phosphate in water using activated carbon loaded with zirconium journal January 1987
Determination of arsenic(V) and arsenic(III) species in environmental samples by coprecipitation with zirconium hydroxide and pre-atomization atomic absorption spectrometry journal January 1993
Ligand-Exchange Chromatography at Zirconium(IV) Immobilized on IDA-Type Chelating Polymer Gel journal August 2000
Selective medium reactions for the `arsenic(III)', `arsenic(V)', dimethylarsonic acid and monomethylarsonic acid determination in waters by hydride generation on-line electrothermal atomic absorption spectrometry with in situ preconcentration on Zr-coated graphite tubes journal November 1998
Optimized arsenic, selenium and mercury determinations in aqueous solutions by energy dispersive x-ray fluorescence after preconcentration onto zirconium-loaded activated charcoal journal February 1995

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