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THERMAL ENCAPSULATION OF METALS IN SUPERFUND SOILS
Citation:
Lees, J., G. Heian, M. Richards, T. McGowan, AND R. Carnes. THERMAL ENCAPSULATION OF METALS IN SUPERFUND SOILS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-95/378, 1995.
Description:
Superfund sites frequently contain both heavy metals and organic hazardous waste. f not properly controlled, the metals may be changed to a more leachable form and may also be emitted to the atmosphere via the exhaust stack. his paper documents a batch kiln R& D test program to solve these metal-related problems. t was performed under the U.S. EPA's SITE (Superfund Innovative Technology Evaluation) Emerging Technology Program. llis Mineral Systems has developed the Thermal Encapsulation Process. etals with limits set by EPA's TCLP (Toxicity Characteristic Leaching Procedure) test and BIF (boiler and industrial furnace) stack emission regulations, such as cad@um, chromium, and lead, are the initial target of this process. his process, while unproven in these areas, may also apply to mixed waste (EPA hazardous waste/low-level radioactive wastes) and may also benefit commercial hazardous waste or Superfund thermal treatment systems. he results of the SITE tests were positive: strong, durable nodules were produced with excellent crush strength and improved resistance to leaching. eed preparation, particularly control of moisture content, was found to be a key element in initiation of agglomeration. ood correlation was found between decreasing TCLP metals leachate levels and increasing crush strength.