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US 2012/0223022 A1Published application
Contaminant removal from waters using rare earths
AssigneeMolycorp Minerals, LLC
InventorsCarl Hassler, John Burba, Robert Cable
Life of this patent
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Abstract
The present disclosure is directed to the use of rare earth-containing additives, particularly rare earth-containing additives comprising rare earths of plural oxidation states, to remove, particularly from recreational waters, various target materials, such as disinfectant by-products and precursors thereof, phosphates, and organophosphates.
Claims22
A method, comprising:
- receiving a water containing at least one of a disinfection by-product and a disinfection by-product precursor;
- and
- contacting the water with a rare earth-containing additive to remove at least one of the disinfection by-product and disinfection by-product precursor from the water and form a treated water.
A method, comprising:
- receiving a water containing at least one of a disinfection by-product, disinfection by-product precursor and a target material;
- and
- contacting the water with a rare earth additive to remove at least one of disinfection by-product, disinfection by-product precursor and a target material from the water, the rare earth the rare earth additive comprises at least one of cerium (IV)-containing composition and a water soluble trivalent rare-earth containing composition.
A composition, comprising:
- a rare earth;
- and
- an oxyanion, wherein a molar ratio of the rare earth to oxyanion of about 1:1.3 to about 1:2.6.
A human bathing system, comprising:
- a rare earth-containing additive;
- and
- a water recirculation system operable to treat and recirculate water to the at least one of a pool, spa, and hot tub, wherein:
- the water is substantially free of a halogenated antimicrobial additive;
- the rare earth-containing additive removes phosphates and microbes from the re-circulated water.
2 more elements
Dependencies are inferred from the claim text.