Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1997-07-14
1999-03-02
Straub, Gary P.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
405128, 405263, 588251, 588256, A62D 300
Patent
active
058773932
ABSTRACT:
A process for treating contaminated waste to stabilize environmentally harmful heavy metals. The waste is contacted with a mixture of a sulfide, preferably calcium sulfide, an inorganic phosphate, which prevents oxidation of sulfide, and a base that at least includes calcium hydroxide. The process stabilizes harmful, heavy metal materials in the waste but avoids the prior art disadvantage of emitting hydrogen sulfide.
REFERENCES:
patent: 4278539 (1981-07-01), Santhanam et al.
patent: 4329224 (1982-05-01), Kim
patent: 4354942 (1982-10-01), Kaczur et al.
patent: 4534942 (1985-08-01), Grasset et al.
patent: 4629509 (1986-12-01), O'Hara et al.
patent: 4737356 (1988-04-01), O'Hara et al.
patent: 4889640 (1989-12-01), Stanforth
patent: 4943377 (1990-07-01), Legare, III
patent: 4950409 (1990-08-01), Stanforth
patent: 5037479 (1991-08-01), Stanforth
patent: 5139365 (1992-08-01), Chesner
patent: 5162600 (1992-11-01), Cody et al.
patent: 5202033 (1993-04-01), Stanforth et al.
patent: 5234485 (1993-08-01), Bolsing
patent: 5397478 (1995-03-01), Pal et al.
patent: 5512702 (1996-04-01), Ryan et al.
patent: 5536899 (1996-07-01), Forrester
patent: 5569155 (1996-10-01), Pal et al.
Conner, R. "Chemical Fixation and Solidification of Hazardous Waste", (New York: Van Nostrand Reinhold, 1992).
Stiller et al., "An experimental evaluation of the use of rock phosphate (apatite) for the amelioration of acid producing coal mine waste" (1989) 9 Mining Science and Technology 283-287.
Renton et al., "The Use of Phosphate Materials as Ameliorants for Acid Mine Drainage".
Solucorp Industries Ltd.
Straub Gary P.
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