Patent ID: 9242878
Filing Date: 2016-01-26
CPC Classification: C02F

Claim Text:
1. A method for removing heavy metals from contaminated water, comprising collecting metal salt precipitates from a water softening process, wherein said metal salt precipitates include calcium salts, magnesium salts, and sodium aluminate salts, drying said metal salt precipitates to produce dried metal salt precipitates, contacting water having a concentration of one or more heavy metals with said dried metal salt precipitates, and collecting water having a reduced concentration of said heavy metal(s), wherein the water softening process includes: collecting well water and passing the well water through a sand filter; cooling the filtered water; after the cooling, passing the water to a precipitation chamber; adding a solution of sodium aluminate to the water in the precipitation chamber; and after the adding the sodium aluminate, adding lime and soda to the water in the precipitation chamber.