Toxic waste fixant and method for using same

Details Toxic waste fixant and method for using same Toxic waste fixant and method for using same

C - Chemistry, Metallurgy

04

B

C04B 22/12 (2006.01) B09B 3/00 (2006.01) B09C 1/08 (2006.01) C02F 11/00 (2006.01) C04B 22/14 (2006.01) C04B 28/00 (2006.01) C04B 28/08 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2079507

A toxic waste fixant for detoxification of a contaminated soil, sediment, and or sludge material includes a mixture of : ferric and/or ferrous sulfate, manganese sulfate, and/or aluminium sulfate and/or Portland cement, and/or gypsum (calcium sulfate) , and/or blast furnace slag, and/or lime (calcium oxide) . Fixants made from mixtures of the above compounds are designed to prevent leaching in excess of regulatory standards for specified inorganic and organic toxic compounds and elements. These fixants will also reduce the concentration of most organic toxic compounds through various chemical reactions and bonding as determined by solvent extractions and analysis by GC/MS. The ferric and/or ferrous sulfate may be partially or completely replaced by cobalt sulfate, whereas instead of the respective sulfates the corresponding chlorides may be used as well.

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