General Chemical Equilibrium Model for Stabilized/Solidified Wastes
Publication: Journal of Environmental Engineering
Volume 128, Issue 7
Abstract
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 or nitric acid and also accurately predicted concentrations of the primary components of cement (Ca, Si, Al, and
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Information
Published In
Journal of Environmental Engineering
Volume 128 • Issue 7 • July 2002
Pages: 653 - 661
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Sep 29, 2000
Accepted: Oct 26, 2001
Published online: Jun 14, 2002
Published in print: Jul 2002
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