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US 3,933,635 AGranted
Method for removing soluble selenium from acidic waste water
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorWayne N. Marchant
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Abstract
Selenium is removed from solution in acidic waste water by treatment of the water with a metallic reducing agent. The invention is particularly effective for removal of selenium from zinc smelter effluent by reaction of the effluent with powdered zinc.
Claims4
A method for removing selenium from zinc smelter effluent comprising reacting the effluent with a metallic reducing agent at a temperature of about 25.degree. to 85.degree. C for a time sufficient to reduce a substantial portion of the soluble selenium to insoluble metallic selenium.
Dependencies are inferred from the claim text.