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Title: Use of MgO doped with a divalent or trivalent metal cation for removing arsenic from water

Systems and methods for use of magnesium hydroxide, either directly or through one or more precursors, doped with a divalent or trivalent metal cation, for removing arsenic from drinking water, including water distribution systems. In one embodiment, magnesium hydroxide, Mg(OH).sub.2 (a strong adsorbent for arsenic) doped with a divalent or trivalent metal cation is used to adsorb arsenic. The complex consisting of arsenic adsorbed on Mg(OH).sub.2 doped with a divalent or trivalent metal cation is subsequently removed from the water by conventional means, including filtration, settling, skimming, vortexing, centrifugation, magnetic separation, or other well-known separation systems. In another embodiment, magnesium oxide, MgO, is employed, which reacts with water to form Mg(OH).sub.2. The resulting Mg(OH).sub.2 doped with a divalent or trivalent metal cation, then adsorbs arsenic, as set forth above. The method can also be used to treat human or animal poisoning with arsenic.
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Issue Date:
OSTI Identifier:
Sandia Corporation SNL-A
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2013 Aug 12
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Method for removing arsenic or selenium from an aqueous solution containing a substantial background of another contaminant
patent, June 1990

In situ formation of phosphate barriers in soil
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Situ formation of apatite for sequestering radionuclides and heavy metals
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In situ remediation process using divalent metal cations
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patent, January 2005

Inorganic ion sorbents and methods for using the same
patent, July 2006

Inorganic ion sorbents
patent, October 2006

Arsenic removal from water
patent, July 2007

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