초록 ▼

A method is provided for oxidizing arsenic in an arsenic-containing solution. The method comprises contacting the solution containing arsenic in a +3 oxidation state with an amount of a specific type of oxidizing agent, i.e., an agent containing at least one [Figure] wherein X is a halogen to effect

A method is provided for oxidizing arsenic in an arsenic-containing solution. The method comprises contacting the solution containing arsenic in a +3 oxidation state with an amount of a specific type of oxidizing agent, i.e., an agent containing at least one [Figure] wherein X is a halogen to effect substantially complete oxidation of the arsenic to the +5 oxidation state. The amount of oxidizing agent used is substantially less than that which would theoretically be required. In accordance with a particularly preferred embodiment, the oxidized arsenic is reacted with a metal to form a substantially water-insoluble precipitate, preferably an iron or calcium arsenate.

대표청구항 ▼

A method of treating an aqueous solution containing one or more arsenic compounds in a +3 oxidation state comprising, contacting the aqueous solution with an amount of an oxidizing agent to convert substantially all of the +3 oxidation state arsenic to a +5 oxidation state, said amount being substan

A method of treating an aqueous solution containing one or more arsenic compounds in a +3 oxidation state comprising, contacting the aqueous solution with an amount of an oxidizing agent to convert substantially all of the +3 oxidation state arsenic to a +5 oxidation state, said amount being substantially less than that which theoretically would be required to react with substantially all of the arsenic in the +3 oxidation state and any other oxidizable species in the aqueous solution, said oxidizing agent including at least one [Figure] wherein X is a halogen.