ABSTRACT
The diffusion of coal-tar compounds in natural clayey till was studied. Diffusion profile data strongly indicated highly non-linear sorption isotherms with significantly stronger sorption of the most strongly sorbing compounds, in contrast to weaker sorption of the less strongly sorbing compounds, at high solute concentrations. The observed diffusion profiles have important implications with respect to migration of coal-tar and dissolved coal-tar compounds in fractured clayey till.
