Methods of destruction of cyanide in cyanide-containing waste
AssigneeWaste Management, Inc.
InventorGary Fisher
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Abstract
Methods of treatment of cyanide-containing waste are provided. In particular, methods for treatment of spent potliner prior to landfill disposal are provided. These methods, which involve treatment of the waste with a mixture containing an aqueous oxidizing solution containing an agent, such as a metal chloride, that increases the oxidation potential of the solution, can be performed at ambient temperature and pressure.
Claims33
A method for destroying cyanide in spent potliner, comprising:
- crushing the spent potliner;
- and
- contacting the ground spent potliner, at ambient temperature and pressure, with an aqueous oxidizing solution that contains a sufficient amount of oxidizing agent to lower the total cyanide concentration present in the spent potliner.
A method of treatment of solid hazardous waste containing a cyanide to destroy cyanide, comprising:
- treating the waste with an aqueous oxidizing solution and an agent that enhances the oxidation potential of the oxidizing solution.
A method for treating cyanide-containing material to destroy cyanides, *
- contacting the material for a sufficient amount of a mixture containing a metal chloride and an aqueous oxidizing solution for a sufficient time to reduce the cyanide concentration in the material.
A composition containing spent potliner, an aqueous oxidizing agent and a metal chloride.
Dependencies are inferred from the claim text.