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AssigneeRedox Technology Group, LLC
InventorsGary J. Meyer, Thomas P. McCullough, Anthony J. Kriech, Ralph E. Roper, JR.
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A method of reducing the mobility of metal contaminates in mediums such as soil, groundwater, sludge, etc. that involves contacting the mediums with a reagent that is a ferrous sulfide suspension that contains at least FeS and Al(OH)3. The reagent is produced by reacting a solution that contains at least NaAlO2 and NaOH with a solution that contains FeCl2, HCl and water to form a reaction mixture that contains Fe2+, Cl−, Na+, Al(OH)3 and H2O; and adding NaHS to the reaction mixture. The mobility of the metal contaminates is reduce by adsorption of the metal contaminates in the medium onto the surface of ferrous sulfide or Al(OH)3 in the ferrous sulfide suspension; adsorption of the metal contaminates in the medium onto iron (hydr)-oxides formed in the suspension; and precipitation of the metal contaminates.
A method for reducing the mobility of at least one of nickel and mercury from a medium selected from the group consisting of soil, sediments, groundwater, sludge, and which method comprises providing a reagent that comprises a ferrous sulfide suspension and contacting the medium with the reagent, the reagent being produced by:
A chemical reagent for reducing the mobility of at least one of nickel and mercury from a medium selected from the group consisting of soil, sediments, groundwater, sludge and where said reagent comprises a ferrous sulfide suspension that is produced by:
A method for reducing the mobility of metal contaminates from a medium selected from the group consisting of soil, sediments, groundwater, sludge, and which method comprises providing a reagent that comprises a ferrous sulfide suspension and contacting the medium with the reagent, the reagent being produced by:
Dependencies are inferred from the claim text.