PROCESS FOR FIXING LEAD-CONTAMINATED ECOLOGICALLY HAZARDOUS INDUSTRIAL WASTE MATERIALS USING CLINOPTILOLITE ZEOLITE

摘要

There is provided a method for the ecologically safedisposal of lead-contaminated hazardous industrial wastes(such, as for example, those generated as discardableby-products in primary and secondary lead smelting operations,especially, blast furnace slags and matte), which comprisesreducing the size of the lead-contaminated industrial wastesand treating them, prior to encapsulation in a hardenablematerial, with the naturally occurring zeolite,clinoptilolite, in an amount sufficient to prevent lead ions(Pb +2) from leaching out of such industrial wastes, throughexposure to the action of atmospheric agents (e.g., hot airand rain, or as a result of cyclical freezing and thawing intemperature climates), even over an extended period of time.