Immobilization of lead in solid residues from reclaiming metals

Details Immobilization of lead in solid residues from reclaiming metals Immobilization of lead in solid residues from reclaiming metals

1991-03-22

1995-07-04

Zimmerman, John

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

423 89, 423305, 423659, 423DIG18, C01B 2537, C01G 2100, A62D 300

Patent

active

054302331

ABSTRACT:
Solid residues arising from the reclamation of metal from, for example, insulated wires and automobiles, have lead (Pb) sufficiently insolubilized to pass the EPA toxicity 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.

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patent: 5245114 (1993-09-01), Forrester
Sullivan, "Recycling Scrap Wire and Cable: The State of the Art", Spring Mtg. of the Nonferrous/Electrical div. of the Wire Assn. Intnl., May 1985.

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