Cementitious encapsulation of waste materials and/or contaminated soils containing heavy metals, to render them immobile
The present invention relates to the cementitious encapsulation of waste materials and/or contaminated soils containing heavy metals, to render them immobile, and particularly to the immobilization of metals, in regulated amounts, in the wastes. A waste product comprising the metals is provided. A mixture is prepared comprising the wastes and/or contaminated soils containing heavy metals, water, and a cementitious composition. The cementitious composition comprises magnesium oxide and magnesium chloride in proportions effective to produce, with the water, a magnesium oxychloride cement. The cementitious composition is present in an amount which, on setting, is effective to immobilize the metals in the waste and/or contaminated soils. The mixture of waste and/or contaminated soils and cementitious composition is introduced to a disposition site, and allowed to set and harden at the site. The present invention is particularly useful for the remedial treatment of landfill sites. No Drawings
- Assignee:
- PTO; EDB-94-154957
- Patent Number(s):
- A; US 5276255
- Application Number:
- PPN: US 7-999286
- OSTI ID:
- 6866313
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
CONTAMINATION
ELEMENTS
ENCAPSULATION
MANAGEMENT
METALS
PROCESSING
REMEDIAL ACTION
SANITARY LANDFILLS
SOILS
SOLID WASTES
TECHNOLOGY ASSESSMENT
VITRIFICATION
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING
WASTES