General chemical equilibrium model for stabilized/solidified wastes Academic Article uri icon


  • Chemical equilibrium models have an important role in predicting the behavior of stabilized/solidified (s/s) wastes for risk assessment. Such a model has been developed for wastes treated by conventional solidification/stabilization and it is named SOLTEQ-B. This model is an improvement over a previous version (SOLTEQ) in terms of speed and reliability of convergence. The improvement is due primarily to use of a different method of describing the equilibrium characteristics of calcium silicate hydrate, which is the primary product of cement hydration. SOLTEQ-B was evaluated using experimental data from a series of batch equilibrium tests of pure s/s binder and s/s binder/waste mixtures. SOLTEQ-B accurately predicted pH during neutralization by CO2 or nitric acid and also accurately predicted concentrations of the primary components of cement (Ca, Si, Al, and SO4).

published proceedings


author list (cited authors)

  • Park, J. Y., & Batchelor, B.

citation count

  • 5

complete list of authors

  • Park, JY||Batchelor, B

publication date

  • July 2002