LOW-TEMPERATURE THERMAL-TREATMENT OF CONTAMINATED SOILS - SIMPLE MATHEMATICAL-MODELS

Mathematical models for low-temperature thermal treatment of contamina ted soils for the removal of semivolatile organic compounds (SVOCs) by batch and continuous flow units are described. In one set of models t he SVOC is assumed to obey a linear adsorption isotherm on the soil; i n the second set the SVOC is assumed to be present as nonaqueous phase liquid (NAPL) blobs dispersed within the porous soil. The soil is rep resented by porous spheres of specified radius through which the escap ing SVOC must diffuse. Results of calculations with both models for co ntinuous flow units are presented, and the dependence of the results o n the model parameters is discussed.