Cementitious encapsulation of waste materials and/or contaminated soils containing heavy metals, to render them immobile

Patent · Tue Jan 04 00:00:00 EST 1994

OSTI ID:6866313

Stark, J N

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): US 5276255; A
• Application Number: PPN: US 7-999286
• OSTI ID: 6866313
• Resource Relation: Patent File Date: 30 Dec 1992
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
METALS
ENCAPSULATION
SOILS
SOLID WASTES
CONTAMINATION
REMEDIAL ACTION
SANITARY LANDFILLS
TECHNOLOGY ASSESSMENT
VITRIFICATION
WASTE PROCESSING
ELEMENTS
MANAGEMENT
PROCESSING
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)