Permeability Studies of Water and Aqueous Solutions of Urea, Ferrous Sulphate and Zinc Sulphate through a Soil Membrane

Results on hydrodynamic permeability for water and aqueous solutions of urea, ferrous sulphate and zinc sulphate across a soil membrane of known thickness at 35°C are reported. The permeability coefficient, L_p, is minimum for water and maximum for ferrous sulphate. The factional coefficient, f_wm, between membrane matrix and water has been evaluated and its dependence upon the solute concentration has also been discussed. The equivalent pore radius of the soil membrane varies with concentration of the solute which has been attributed to the change in electrical double layer at the solution-soil interface.