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METALS DISTRIBUTION IN SOLIDIFIED/STABILIZED WASTE FORMS AFTER LEACHING
Citation:
Cheng, K. AND P. Bishop. METALS DISTRIBUTION IN SOLIDIFIED/STABILIZED WASTE FORMS AFTER LEACHING. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/139 (NTIS PB94155249), 1992.
Description:
A series of leach tests were conducted to study the metal distributions in cement based waste form before and after leaching in acetic acid solutions. he specimens were prepared in the laboratory with a Type I portland cement and sludges containing high levels of lead, cadmium, and arsenic. etal contents in the specimen were determined by both the SEM/EDX method and the Wet digestion/AA method. ernel surrounded by a surface layer was observed in every leached specimen. n the surface layer, most of the calcium and the stabilized metals, (Pb, Cd, and As) were removed by the leachants. he metal contents of the kernel, however, were very close to those of the original material.
