Patent ID: 8636909

Claim:
A process of removing viruses from drinking water comprising: a. filtering drinking water, having a viral contaminant, through a layer of coarse sand; b. contacting the drinking water with a composite iron matrix; and c. purifying the drinking water by allowing the composite iron matrix to adsorb the viral contaminant for at least fifteen minutes; and wherein the composite iron matrix comprises: i. an iron component of at least about 68% to about 92% iron by weight; ii. a manganese component of at least about 0.2% to about 3% manganese by weight; iii. a cerium component of at least about 4 μg per gram of the iron composition; iv. a carbon component of at least about 1% to about 5% carbon by weight; v. a phosphorous component of at least about 0.05% to about 2% phosphorous by weight; vi. a sulfur component of at least about 300 μg per gram of the iron composition to about 1000 μg per gram of the iron composition; vii. an aluminum component of at least about 0.01% aluminum by weight; viii. a silicon component of at least about 1% to about 2% silica by weight; ix. a chromium component of at least about 300 μg per gram of the iron composition to about 500 μg per gram of the iron composition; x. a copper component of at least about 300 μg per gram of the iron composition to about 600 μg per gram of the iron composition; and xi. a zinc component of at least about 8 μg per gram of the iron composition to about 20 μg per gram of the iron composition.