MAECTITE{reg_sign} chemical treatment technology: Selected case histories for lead and cadmium
- Sevenson Environmental Services, Inc., Niagara Falls, NY (United States)
Chemical treatment for lead and other heavy metals, including cadmium, in soil and solid waste with the MAECTITE{reg_sign} process creates hard, insoluble mixed forms. Heavy metals are rendered non-hazardous CRA definition, therefore, treated material may be disposed as a special waste. The MAECTITE{reg_sign} chemical treatment process forms non-leachable minerals through isomorphic reaction-series induced nucleation. Unlike cementitious, silicic, and/or pozzolanic methods where contaminants are restrained in a mixture with binding agents or hydroxides subject to degradation from physical and chemical conditions, MAECTITE{reg_sign} utilizes true bonding and crystal nucleation from disassociated metal species and yields metal-substituted crystal compounds. Waste subjected to optimized MAECTITE{reg_sign} chemical treatment complies with RCRA limits as determined by USEPA`s EPTOX and TCLP test methods, and the Multiple Extraction Procedure (MEP) that simulates 1,000 year exposure to acidic environments. The MAECTITE{reg_sign} chemical treatment process often reduces waste volume by over 20% with limited or no mass increase partially due to increased particle density, eliminated interstitial space, dehydration of the waste matrix, and destruction of semi-stable carbonates.
- OSTI ID:
- 49416
- Report Number(s):
- CONF-941189--; ISBN 1-56590-016-2
- Country of Publication:
- United States
- Language:
- English
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