Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1992-12-30
1994-01-04
Corbin, David H.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
405129, 405266, B09B 300, E02D 312
Patent
active
052762556
ABSTRACT:
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 such wastes. A waste product comprising the metals is provided. A mixture is prepared comprising said 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 said water, a magnesium oxychloride cement. The cementitious composition is present in an amount which, on setting, is effective to immobilize the metals in said 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 said site. The present invention is particularly useful for the remedial treatment of landfill sites.
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