Modelling of Contaminant Transport in Clays Via Irreversible Thermodynamics

by Raymond N. Yong, McGill Univ, Montreal, Quebec, Canada,
Hossein M. V. Samani, McGill Univ, Montreal, Quebec, Canada,

Document Type: Proceeding Paper

Part of: Geotechnical Practice for Waste Disposal '87


This study develops a model for the analysis and prediction of contaminant transport in soils using principles of irreversible thermodynamics. The developed model includes five parameters which are different for various kinds of solute contaminant components and soil systems. These parameters are estimated by applying Powell's method in nonlinear optimization of experimental results obtained from laboratory leaching cell tests. Various results obtained from tests on different soils in laboratory and field situations are compared with theoretical predictions. These indicate that recognition of a changing diffusion/dispersion coefficient is necessary to provide accord between predicted and measured values of time variation of contaminant transport.

Subject Headings: Soil pollution | Thermodynamics | Soil analysis | Parameters (statistics) | Water pollution | Permeability (soil) | Mathematics | Geotechnical models

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