The role silica colloids on facilitated cesium transport through glass bead columns and modeling

摘要

Groundwater colloids cab act as a vector which enhances the migration of contaminants. While sorbed to mobile colloids, contaminants can be held in the aqueous phase which prevents them from interacting with immobile aquifer surfaces. In this study, an idealized laboratory set-up was used to examine the influence of amorphous silica colloids on the transport of cesium. Synthetic groundwater and saturated glass bead columns were used to minimize the presence of natural colloids material. The columns were assembled in replicate, some packed with 150-210μm glass bead and others packed with 355-420μm glass beads.