Immobilization of lead in bottom ash

Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation

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Details

423659, 106405, 106DIG1, 110259, C04B 1804, A62D 300

Patent

active

052451143

ABSTRACT:
Bottom ash arising from solid waste combustion has lead (Pb) sufficient quantity to sometimes fail the EPA TCLP test. Addition of water-soluble phosphate, especially phosphoric acid, increases the immobilization of lead (Pb) so as to make such residues in compliance with the toxicity tests over a substantially broader pH range, particularly with respect to the more stringent TCLP extraction test. The bottom ash may be wet or dry when contracted with the water-soluble phosphate. The contacting is preferably preformed in an enclosed environment to avoid bottom ash contact with or exposure to the ambient atmospheres prior to treatment.

REFERENCES:
patent: 3676165 (1972-07-01), Schneider-Arnold
patent: 4049462 (1977-09-01), Cocozza
patent: 4113504 (1978-09-01), Chen et al.
patent: 4124405 (1978-11-01), Quienot
patent: 4354876 (1982-10-01), Webster
patent: 4375986 (1983-03-01), Pichat
patent: 4377483 (1983-03-01), Yamashita et al.
patent: 4384923 (1983-05-01), Hillekamp
patent: 4432666 (1984-02-01), Frey et al.
patent: 4496267 (1985-01-01), Gnaedinger
patent: 4671882 (1987-06-01), Douglas et al.
patent: 4737356 (1988-04-01), O'Hara et al.
patent: 4853208 (1989-08-01), Reimers et al.
patent: 4950409 (1990-08-01), Stanforth
patent: 4975115 (1990-12-01), Irons

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