Powerful reductant for decontamination of groundwater and surface streams
First Claim
1. The method for remediation of heavy metals and halogenated hydrocarbon contaminates from aqueous media comprising,forming a solution of a water soluble salt of Fe in water in the presence of a support material, adding an alkali borohydride to the solution to form a precipitate of zero valent Fe having a siloxane coupling on the support material wherein the precipitate has an average particle size of about 5 nm to about 50 nm, and exposing the support material having the zero valent Fe thereon to an aqueous media having a pH of 5.5 or above and having a contaminate selected from the group consisting of heavy metals and halogenated hydrocarbons to cause any one of the heavy metals and halogenated hydrocarbons to deposit onto the precipitate.
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Abstract
The disclosed invention relates to a composite material for use in recovery of radionuclides, metals, and halogenated hydrocarbons from aqueous media. The material has very high surface area, and includes nanometer sized, zero-valent iron on a support. The material can be used to remediate aqueous media which have contaminants such as radionuclides, metals and halogenated hydrocarbons from aqueous media.
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Citations
9 Claims
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1. The method for remediation of heavy metals and halogenated hydrocarbon contaminates from aqueous media comprising,
forming a solution of a water soluble salt of Fe in water in the presence of a support material, adding an alkali borohydride to the solution to form a precipitate of zero valent Fe having a siloxane coupling on the support material wherein the precipitate has an average particle size of about 5 nm to about 50 nm, and exposing the support material having the zero valent Fe thereon to an aqueous media having a pH of 5.5 or above and having a contaminate selected from the group consisting of heavy metals and halogenated hydrocarbons to cause any one of the heavy metals and halogenated hydrocarbons to deposit onto the precipitate.
Specification