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Method for fixating sludges and soils contaminated with mercury and other heavy metals

United States Patent

June 28, 2005
View the Complete Patent at the US Patent & Trademark Office
The invention relates to a method, composition and apparatus for stabilizing mercury and other heavy metals present in a particulate material such that the metals will not leach from the particulate material. The method generally involves the application of a metal reagent, a sulfur-containing compound, and the addition of oxygen to the particulate material, either through agitation, sparging or the addition of an oxygen-containing compound.
Broderick; Thomas E. (Arvada, CO), Roth; Rachel L. (Littleton, CO), Carlson; Allan L. (Evergreen, CO)
ADA Technologies, Inc. (Littleton, CO)
09/ 997,932
November 28, 2001
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under Contract No. DE-FG03-97-ER82722 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.