Method and composition to reduce the amounts of arsenic in water
AssigneeSouth Dakota School of Mines and Technology
InventorsCathleen Webb, Arden Davis, David Dixon
Life of this patent
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Abstract
The present invention relates to a method for removing arsenic in arsenic contaminated water, especially for small drinking water systems such as those used in individual homes, rural areas, and small communities, by simply contacting arsenic-contaminated water with an arsenic removal medium. The present invention also relates to the composition of the arsenic removal medium, which comprises particles of calcium carbonate minerals and magnesium carbonate aggregates.
Claims29
A method of reducing arsenic concentration in water comprising the step of contacting the water with an arsenic removal medium until the arsenic is substantially removed from the water, wherein the arsenic removal medium comprises at least about 70% by weight of calcium carbonate particles.
An arsenic removal medium for reducing the total concentration of arsenic compounds in water comprising at least about 70% by weight calcium carbonate particles and at least about 0.1% by weight magnesium carbonate aggregates.
Dependencies are inferred from the claim text.