Chapter 4 Stabilization/solidification of hazardous wastes in soil matrices Academic Article uri icon

abstract

  • Cementitious solidification/stabilization (s/s) treatment processes combine Portland cement or lime/pozzolan mixtures with waste materials or contaminated soils to immobilize contaminants by physical and chemical mechanisms. It is a low cost remedial alternative and is commonly used at Superfund sites for treatment of soils, sludges and debris. Although widely utilized, s/s processes do not preclude migration of contaminants, but they can substantially reduce the rates of release to the environment. Evaluation of the impact of these releases requires appropriate application of risk assessment techniques. Problems associated with accurate prediction of leach rates are exacerbated in stabilized soil/waste matrices by (1) reactions between soil components and cement hydration or pozzolanic reaction products and (2) interactions between stabilized soil/waste matrices and adjacent media. This paper assesses effects of soil/cement reactions and environmental interactions on solid and solution phase characteristics of stabilized soil/waste matrices. First, available information on soil S/S applications will be evaluated to ascertain plausible disposal scenarios for stabilized soil/waste matrices. Second, cement hydration reactions, soil/cement reactions and environmental interactions that affect solid and solution phase characteristics of stabilized soil/waste matrices and, consequently, long-term leach rates will be delineated. Finally, techniques for predicting long-term leach rates will be evaluated. 1996 Elsevier B.V. All rights reserved.

published proceedings

  • Advances in Porous Media

author list (cited authors)

  • Cook, E. R., & Batchelor, B.

citation count

  • 6

publication date

  • December 1996