Hazardous waste stabilization methods, products and testing procedures
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United States of America Patent
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Jan 31, 2006
Grant Date -
Oct 2, 2003
app pub date -
Dec 4, 2002
filing date -
Dec 5, 2001
priority date (Note) -
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Abstract
A process for the stabilization of metal bearing waste is provided that is based upon the discovery that landfills have anaerobic environments. This process includes adjusting the pH of the waste and adding a sulfide containing reducing agent to the waste to achieve a reducing environment. In one embodiment, electric arc furnace dust is stabilized for landfill disposal. Also provided is a method for a determination of landfilled waste leachability. This method is performed under conditions that simulate the chemical characteristics of landfills. In one embodiment, stabilized metal bearing waste is deoxygenated and a simulated leachate is prepared under anaerobic conditions.
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