Abstract
A column experiment was carried out to assess the migration behavior of trivalent 241Am and pentavalent 237Np in the presence of montmorillonite colloids. The breakthrough phenomena of montmorillonite colloids and pseudocolloids (actinide-bearing montmorillonite colloids) are measured as a function of pH and ionic strength, and are explained by using DLVO theory where the attractive van der Waals and the repulsive electrostatic potentials are taken into account. By using the sorption data cited from the literature [Nagasaki et al., J. Radioanal. Nucl. Chem. Lett. 214 (1996) 381; Technical Report on Research and Development of High-level Radioactive Waste Repositories, Power Reactor and Nuclear Fuel Development Corp. Technical Report PNC TN 1410 92-081, 1992], the actinide migration behavior in the column is simulated.
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