COMPOSITION FOR REMOVING ARSENIC FROM AQUEOUS STREAMS
7 Assignments
0 Petitions
Accused Products
Abstract
Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing the arsenic in the +5 oxidation state from the aqueous phase, normally by contacting the treated feed with alumina or other precipitating agent containing cations in the +3 oxidation state.
103 Citations
30 Claims
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1-24. -24. (canceled)
- 25. A composition comprising a mixture of cerium dioxide (CeO2) and particulate solids containing cations in the +3 oxidation state, wherein said cerium dioxide is not supported on said particulate solids.
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30-45. -45. (canceled)
Specification