Analytical solution of contaminant diffusion through multi-layered soils

Diffusion is the predominant mechanism controlling contaminant transport in soil liners.An analytical solution of contaminant diffusion through layered porous media was presented.The comparisons between the results obtained by the present analytical method and the existing numerical solutions was described by figures.Furthermore,the application of the solutions was illustrated in a practical example.The present method was relatively simple to apply and could be used for preliminary design of landfill liners,evaluating experimental results,and verifying more complex numerical models.