Patent ID: 7736291

Claim:
A method of reducing the leachability and odor of heavy metal bearing material or waste, comprising contacting the heavy metal bearing material or waste with pulverized or fine particle DiCalcium Phosphate DiHydrate (DCPDH) in an amount effective in reducing the leaching of heavy metals from the material or waste to a level no more than non-hazardous levels as determined in an EPA TCLP test, performed on the stabilized material or waste, as set forth in the Federal Register, vol. 55, no. 126, pp. 26985-26998 (Jun. 29, 1990), and odor in accordance with odor index by olfactory measure, wherein the heavy metal bearing material or waste is selected from the group consisting of incinerator flyash scrubber residue, combined ash comprising incinerator bottom ash and incinerator fly ash, coal furnace flyash, auto shredder residue, tire incinerator flyash and copper wire insulation.