05527982 is referenced by 23 patents and cites 42 patents.

The present invention discloses a method of treating lead bearing process materials and lead toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable lead in lead bearing solid and liquid waste materials to a non-leachable form by mixing the material with lime, gypsum and/or phosphoric acid. 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 tetraethyl lead contaminated organic peat and muck. The present invention discloses a process comprising a single step mixing of one or more treatment additives, and a process comprising a two step mixing wherein the sequence of performing the steps may be reversible. The present invention provides a new way of treating a universe of lead contaminated materials at any pH.

Title
Fixation and stabilization of metals in contaminated materials
Application Number
494774
Publication Number
5527982
Application Date
March 15, 1993
Publication Date
June 18, 1996
Inventor
Karl W Yost
Crete
IL, US
Dhiraj Pal
Chicago Heights
IL, US
Agent
Kevin E McDermott
Assignee
Sevenson Environmental Services
NY, US
IPC
E02D 3/00
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