Method of sealing permeable unconsolidated materials

Hydraulic and earth engineering – Subterranean waste disposal – containment – or treatment – With treatment of waste

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Details

252633, 405128, 405264, E02B 312, B09B 100

Patent

active

049813943

ABSTRACT:
Methods of forming layers of material upon or below the earth's surface and above the water table to prevent or effectively inhibit the flow of groundwaters through such laters of initially unconsolidated materials. Chemical components are added to materials such as incinerator ash or other waste materials deposited in a landfill operation to create alkaline conditions which, when contacted by water, induce precipitation of calcite in sufficient quantities to produce a cementing action which retards leachate formation. In another aspect, a site is prepared for use as a landfill with an essentially hydraulically sealed sub-base by choosing a site with alkaline soils or carbonate bedrock and adding appropriate chemical components to cause calcite to precipitate when contacted by water, which may be applied directly or by naturally occurring precipitation. In yet another aspect, low level radioactive or other potentially hazardous wastes are disposed of by placing containers of such waste in underground chambers and filling the balance of the chambers with chemical components to create an alkaline buffer zone in which calcite is precipitated to provide a cementing action and retard incursion of groundwaters through the buffer zone.

REFERENCES:
patent: 3793841 (1974-02-01), Dozsa
patent: 3876439 (1975-04-01), Schneider
patent: 4016073 (1977-04-01), Jordan
patent: 4136998 (1979-01-01), Bassier et al.
patent: 4142912 (1979-03-01), Young
patent: 4233015 (1980-11-01), Teague et al.
patent: 4428700 (1984-01-01), Lennemann
patent: 4543013 (1985-09-01), Wagner et al.
patent: 4844840 (1989-07-01), Feizollahi
patent: 4859621 (1989-09-01), McLaren et al.

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