Model of Leaching Behavior from Fly Ash Landfills with Different Age Refuses
Publication: Journal of Environmental Engineering
Volume 124, Issue 8
Abstract
A mathematical model that accounts for simultaneous moisture movement and contaminant transport is developed to predict the leaching behavior from fly ash landfills with different age refuses. The approach is based on dividing the refuse layer into separate regions for each age refuse and solving model equations for each region. With the exception of boron in leachate of coal fly ash, good agreement between model simulation and experimental data of laboratory column-leaching tests was obtained. However, the simulated boron concentration profile can be improved by the addition of a retardation factor in the model equation. The important parameters were evaluated in a sensitivity analysis to see their respective effects. Four parameters were identified to influence strongly the model performance: dissolution rate constant (kn), exponential constant (n), ultimate mass of leachable contaminant (M0), and maximum contaminant concentration (Cmax).
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 124 • Issue 8 • August 1998
Pages: 767 - 775
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Aug 1, 1998
Published in print: Aug 1998
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