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Leaching of cement-based waste forms in acetic acid solutions with different acidic strengths has been investigated in this work. The examination of the morphology and pH profile along the acid penetration route by an optical microscope and various pH color indicators is reported. A clear-cut leaching boundary, where the pH changes from below 6 in the leached surface layers to above 12 in the unleached waste form, was observed in every leached sample.
solidification, stabilization, hazardous wastes, pH, morphology, metals, leaching, microscopy
Envir. Engr., Dames & Moore, Santa Ana, CA
Prof., University of Cincinnati, Cincinnati, OH