Nanoparticulate Apatite Coated Calcite/Limestone Filter Materials for Removing Contaminants from Contaminated Water
AssigneeThe Trustees of Princeton University
InventorsSatish C. B. Myneni, Peter JAFFE
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Abstract
The invention provides hydroxyapatite-coated carbonate mineral particulate filter materials, and a novel synthesis process. The filter materials are particularly effective in removing fluoride contaminants from contaminated water and may render the treated water ingestible. Also disclosed are articles containing the hydroxyapatite-coated carbonate mineral particulate filter materials.
Claims21
Hydroxyapatite-coated carbonate mineral particulate filter materials effective in removing fluoride ions from drinking water sources or wastewater, wherein the hydroxyapatite coating are one or more crystalline forms of hydroxyapatite present on the surface of the carbonate mineral particles.
A process for the synthesis of hydroxyapatite-coated carbonate mineral particulate filter materials which comprises the steps of:
- reacting in a liquid medium, granular carbonate minerals with a phosphate to thereby form hydroxyapatite on the surface of the carbonate material.
Dependencies are inferred from the claim text.