Patent ID: 9725341
Date: 2017-08-08
CPC Classifications: B01D,C02F

Claim:
1. A method for removing one or more contaminants from an aqueous stream comprising: a) adding one or more hydraulic binders and one or more nucleophilic promoters to the aqueous stream; b) allowing the one or more hydraulic binders, the one or more promoters and the one or more contaminants to interact to form solidified contaminants; and c) separating the solidified contaminants from the aqueous stream; wherein the one or more nucleophilic promoters are selected from the group consisting of elemental sulfur, nitriles, organophosphines, and ethers; and wherein the one or more hydraulic binders are added to the aqueous stream in the form of a powder mixture; wherein the aqueous stream is selected from the group consisting of drinking water, ground water, well water, surface water, agricultural waters, wastewater from mining processes, geothermal fluids, water from mining processes associated with smelting, mine dewatering, tailing impoundment treatment, flotation, autoclave, acid mine drainage, wastewater from flue gas, desulfurization units, runoff from wet fly ash ponds, and groundwater streams; and wherein the dosage of the one or more hydraulic binders added to the aqueous stream is about 10 ppm to about 50,000 ppm.