Safe ceramic encapsulation of hazardous waste with specific shal

Details Safe ceramic encapsulation of hazardous waste with specific shal Safe ceramic encapsulation of hazardous waste with specific shal

1996-08-19

1997-10-14

Mai, Ngoclan

Hazardous or toxic waste destruction or containment

Destruction or containment of radioactive waste

By fixation in stable solid media

588 14, 588252, 588257, 588 17, 976DIG385, G21F 900

Patent

active

056782357

ABSTRACT:
A safely encapsulated hazardous waste product free of unwanted leaching of contaminated metal constitutents and process therefor wherein a quantity of hazardous waste and a quantity of shale material characterized by having an aluminosilicate content containing at least 9.35% by weight of Fe.sub.2 O.sub.3, wherein the shale is reduced to a fine mesh before mixing, and defines a brick-like form as fired at about 1,150.degree. C. for a period of time to change the shale material into a semi-molten state and thereafter cooled to safely encapsulate the waste within the shale as a unit-handled product. The product of the invention satisfies and exceeds RCRA and LDR (EPA) requirements as shown by Toxicity Characteristic Leaching Procedure (TCLP) results.

REFERENCES:
patent: 3900415 (1975-08-01), Lee et al.
patent: 3959172 (1976-05-01), Brownell et al.
patent: 4173546 (1979-11-01), Hayes
patent: 4853208 (1989-08-01), Reimers et al.
patent: 5302565 (1994-04-01), Crowe

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