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RECORD NUMBER: 42 OF 190

OLS Field Name OLS Field Data
Main Title Effects of Leaching on Pore Size Distribution of Solidified/Stabilized Wastes.
Author Bishop, P. L. ; Gong, R. ; Keener., T. C. ;
CORP Author Cincinnati Univ., OH. Dept. of Civil and Environmental Engineering.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.;Ohio Dept. of Development, Columbus.
Publisher c1994
Year Published 1994
Report Number ODD-RI-3-88-013; EPA/600/J-94/138;
Stock Number PB94-155231
Additional Subjects Leaching ; Pore structure ; Solidification ; Stabilization ; Reprint ; Fly ash ; Sludges ; Waste processing ; Chemical reactions ; Binders ; Cements ; Hazardous materials ; Acetic acid ; Calcium hydroxides ; Waste forms ; Flue gas desulfurization
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB94-155231 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/01/1994
Collation 17p
Abstract
Chemical solidification/stabilization processes are commonly used to immobilize metals in fly ash and flue gas desulfurization (FGD) sludges and to convert these wastes into monolithic or granular materials with better handling properties and reduced permeabilities. The study evaluated the role of pore structure of solidified materials during leaching. The solidified material's initial pore structure, changes in the pore structure which result during leaching, and the effects of pore structure on leaching are discussed. It was found that pore structures varied depending upon the wastes used and the solidification mix formulations tested. After acetic acid leaching, the pore structures of samples changed remarkably. Total pore volumes and pore sizes increased. The higher the alkalinity in a sample, the greater the change of pore structure due to leaching. Changes in pore structure were primarily due to leaching of calcium hydroxide. (Copyright (c) 1992 Elsevier Science Publishers B.V.)