Fixation and stabilization of metals in contaminated soils and m

Details Fixation and stabilization of metals in contaminated soils and m Fixation and stabilization of metals in contaminated soils and m

1999-06-28

2000-10-31

Suchfield, George

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

405128, E02D 300

Patent

active

061394858

ABSTRACT:
The present invention discloses a method of treating lead-bearing soils, waste materials and waste material matrixes. The invention relates to treatment methods employed to chemically convert leachable lead in lead-bearing solid and/or liquid waste materials to a non-leachable form by contacting or mixing the material with a chemical reagent that includes a first component which supplies sulphates, halides, halites, silicates or calcium oxide and a second component which supplies a phosphate anion in solution form. The solid and liquid waste materials include contaminated sludges, slurries, soils, wastewaters, spent carbon, sand, wire chips, plastic fluff, cracked battery casings, bird and buck shots and construction debris. The present invention discloses a process comprising a single step mixing lead-bearing hazardous waste with a chemical reagent. The present invention provides a new way of treating a universe of lead-bearing contaminated materials at any pH.

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