Superfund Innovative Technology Evaluation (SITE)
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|Molecular Bonding System®
Solucorp® developed a patent-pending system to reduce the leachability of heavy metals in soils, slags, and other solid wastes. Metal compounds are rapidly converted to less-soluble metallic sulfides. MBS® utilizes proprietary chemicals to treat the soil; soils can be excavated and treated in a pugmill or in situ using soil mixing augers. The technology was demonstrated at the Midvale Slag Site in Midvale, Utah. Three waste streams, contaminated with arsenic (As), cadmium (Cd), and lead (Pb), were treated; approximately 500 tons of each waste was treated. A second test of 500 tons of one waste was conducted by Solucorp using EPA's protocol and oversight contractor. Toxicity Characterization Leaching Procedure (TCLP) leachable Pb concentrations were reduced to below the regulatory limit. TCLP As and Cd concentrations were below TCLP limits in untreated and treated wastes. The mean volume increases in the treated wastes ranged from 4 to 16 percent. Process throughput averaged 52, 59, 56, and 61 tons/hour for the four waste streams. Costs were estimated at $20/ton for 2 million tons.