Preliminary Ion Exchange Modeling for Removal of Cesium from Hanford Waste Using Hydrous Crystalline Silicotitanate Material

Evaluation of Potential Eluants for Non-Acid Elution of Cesium From Resorcinol-Formaldehyde Resin

“…Tanks AZ-101 and AZ-102 have cesium concentrations of 62 and 57 mg/L respectively. 26 These values are still about 20 to 30% lower than the average final cesium concentration obtained here. SCIX is a supplementary pretreatment system.…”

Modeling of Ion-Exchange for Cesium Removal From Dissolved Saltcake in SRS Tanks 1-3, 37 and 41

“…However, some level of reduced diffusion in the pores is expected resulting from bends along the pore paths that are generally accounted for by a particle tortuosity factor τ defined as: Tortuosity factors for CST and RF resin have been determined by analyzing experimental data obtained at SRNL (Hamm et al, 2002for CST, Aleman et al, 2007. In these studies, it was found that using τ = 5 for CST and τ = 3 for RF gave reasonable results.…”

“…Curie loadings in the ion-exchange columns with feed from Tanks 2 and 41 are both approximately 10 times lower than the maximum. The cesium loadings listed in columns five and six were calculated using the nominal bed density of 1.0 g resin/ml BV (values of the bed density from 0.9 to 1.13 are estimated by Hamm et al, 2002). Since the nominal bed density corresponds to a bed void fraction of 0.5 which is at the high end of the projected values, cesium loadings at 15% greater resin loading are also listed in the last column of Table 9-1.…”

Small Column Ion Exchange Analysis for Removal of Cesium from SRS Low Curie Salt Solutions Using Crystalline Silicotitanate (CST) Resin

“…• Bed porosity is set to current best estimate value of 0.50, where the column is assumed to be uniformly packed (Hamm et al, 2002).…”

“…(Hamm et al, 2002). The recent ORNL CST batch contact tests (Taylor et al, 2003) with IONSIV ® IE-911 suggests no dilution factor is required.…”