| Abstract: | In a study of water migration characteristics and organic contaminant transfer mechanisms in a freezing fine-grained saturated soil, a series of one-dimensional freezing tests were conducted on a clayey silt contaminated with a miscible, non-reactive organic compound, 1-propanol, at various concentrations. The experimental results indicate that the frost heave behaviour and solute rejection mechanisms of a soil contaminated with 1-propanol is similar to that of the same soil contaminated with sodium-chloride salt. It was found that 1-propanol is rejected from the pore for rates of cooling smaller than 4 ± 1°C/day. Diffusion appears to control contaminant redistribution in the unfrozen soil. Finally, there has been no contaminant redistribution in the frozen soil for periods up to 245 hours. |
