Process for fixing lead-contaminated ecologically hazardous indu

Details Process for fixing lead-contaminated ecologically hazardous indu Process for fixing lead-contaminated ecologically hazardous indu

1992-09-08

1993-08-10

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106697, 588252, 588256, C04B 1814

Patent

active

052344983

ABSTRACT:
There is provided a method for the ecologically safe disposal of lead-contaminated hazardous industrial wastes (such, as for example, those generated as discardable by-products in primary and secondary lead smelting operations, especially, blast furnace slags and matte), which comprises reducing the size of the lead-contaminated industrial wastes and treating them, prior to encapsulation in a hardenable material, with the naturally occurring zeolite, clinoptilolite, in an amount sufficient to prevent lead ions (Pb.sup.+2) from leaching out of the industrial wastes, through exposure to the action of atmospheric agents (e.g., hot air and rain, or as a result of cyclical freezing and thawing in temperature climates), even over an extended period of time.

REFERENCES:
patent: 4116705 (1978-09-01), Chappell
patent: 4537710 (1985-08-01), Komarneni et al.
Dialog Abstract--"Studies on cement solidification of radioactive chemical slurry" Suzhen et al., China (Mar. 1986).

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