Method for reduction of heavy metal leaching from hazardous wast

Details Method for reduction of heavy metal leaching from hazardous wast Method for reduction of heavy metal leaching from hazardous wast

1990-04-20

1991-08-06

Straub, Gary P.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

75746, 405129, 423 92, 423102, 423659, 423DIG20, 588257, B09B 300

Patent

active

050374796

ABSTRACT:
A method of treating solid hazardous wastes containing unacceptable levels of leachable metals such as lead, cadmium and zinc includes mixing the solid waste with a buffering agent selected from the group consisting of magnesium oxide, magnesium hydroxide, reactive calcium carbonates and reactive magnesium carbonates, and with an additional agent which is an acid or salt containing an anion that forms substantially nonleachable forms of the metals, which additional agent is selected from the group consisting of triple superphosphate, ammonium phosphate, diammonium phosphate, phosphoric acid, boric acid and metallic iron so that under both acidic and nonacidic leaching conditions the metals in the mixture will be converted to substantially nonleachable forms.

REFERENCES:
patent: 4356030 (1982-10-01), Halpin
patent: 4652381 (1987-03-01), Inglis
patent: 4671882 (1987-06-01), Douglas
patent: 4764284 (1988-08-01), Jansen
patent: 4878944 (1989-11-01), Rolle et al.
patent: 4889640 (1989-12-01), Stanforth
patent: 4950409 (1990-08-01), Stanforth
1985, AFS Transactions, "Methods to Treat EP Toxic Foundry Wastes and Waste Waters," vol. 93, pp. 737-740.
California Cast Metals Association, Feb. 1989, "Detoxifying Foundry Sand," Report to Members.
Nagle, D. L., R. R. Stanforth, P. E. Duranceau and T. P. Kunes, 1983, AFS Transactions, "Treatment of Hazardous Foundry Melting Furnace Dust and Sludges," vol. 91, pp. 715-720.
Turpin, P. D., T. R. Stalzenburg, W. A. Stephens, and T. P. Kunes.

Affiliated with

Also associated with

Rating

Method for reduction of heavy metal leaching from hazardous wast does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for reduction of heavy metal leaching from hazardous wast, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reduction of heavy metal leaching from hazardous wast will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1984649