Water treatment product and method
AssigneeAlcan International Limited
InventorFarid Azizian
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Abstract
A water treatment product which is a particulate material having a specific surface area of at least 1.0 m2/g, or an artefact formed by bonding together such particulate material, and having an insoluble ferric iron coating. Perferably, the particulate material is an alumina-based material. The product is useful in the treatment of water to remove organic materials, cations or anions, and more particularly heavy metals, As, Se or F. Methods of making the water product are also provided.
Claims12
A water treatment method, which method comprises providing a water treatment product, said product being a particulate material having a mean particle size of at least 5 μm and a specific surface area of at least 10 m2/g, or an artefact formed by bonding together such particulate material, and having an insoluble hydrated ferric iron oxide coating, contacting water to be treated with said water treatment product, and thereafter recovering treated water containing a reduced As concentration of not more than 10 μg/l.
A water treatment product, said product being a particulate alumina-based material having a mean particle size of at least 5 μm and a specific surface area of at least 10 m2/g, or an artefact formed by bonding together such particulate alumina-based material, and having an insoluble hydrated ferric iron oxide coating, wherein said product has a capacity for adsorbing inorganic contaminants from water to be treated.
A method of making a water treatment product, said product being a particulate alumina-based material having a mean particle size of at least 5 μm and a specific surface area of at least 10 m2/g, or an artefact formed by bonding together such particulate alumina-based material, and having an insoluble hydrated ferric iron oxide coating, which method comprises soaking the particulate alumina-based material or an artefact formed from the particulate alumina-based material in a ferric solution, and recovering and drying the coated particulate alumina-based material or artefact, wherein said product has a capacity for adsorbing inorganic contaminants from water to be treated.
Dependencies are inferred from the claim text.