Theoretical Analysis of Colloid-facilitated Transport of Radionuclides by Groundwater

Abstract

Mechanisms of colloid-facilitated transport of radionuclides by groundwater are considered for three types of radioactive colloids: intrinsic colloids, primary colloids and pseudocolloids. Effect of elevated velocity of colloid facilitated migration is analyzed. The general characteristic is introduced for the estimation of the role of colloidal species of radionuclide migration velocity. A new probabilistic model of colloid retardation by the host rocks is developed taking into account heterogeneity of the colloid particles.