A multicomponent ion-exchange equilibrium model for chabazite columns treating ORNL wastewaters

Technical Report · Tue Jun 01 00:00:00 EDT 1993

DOI:https://doi.org/10.2172/10173046· OSTI ID:10173046

Perona, J J

Planned near-term and long-term upgrades of the Oak Ridge National Laboratory (ORNL) Process Waste Treatment Plant (PWTP) will use chabazite columns to remove {sup 90}Sr and {sup 137}Cs from process wastewater. A valid equilibrium model is required for the design of these columns and for evaluating their performance when influent wastewater composition changes. The cations exchanged, in addition to strontium and cesium, are calcium, magnesium, and sodium. A model was developed using the Wilson equation for the calculation of the solid-phase activity coefficients. The model was tested against chabazite column runs on two different wastewaters and found to be valid. A sensitivity analysis was carried out for the projected wastewater compositions, in which the model was used to predict changes in relative separation factors for strontium and cesium subject to changes in calcium, magnesium, and sodium concentrations.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10173046
• Report Number(s): ORNL/TM-12272; ON: DE93017560; TRN: 93:017983
• Resource Relation: Other Information: PBD: Jun 1993
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ION EXCHANGE
SENSITIVITY ANALYSIS
MATHEMATICAL MODELS
WATER TREATMENT
EXTRACTION COLUMNS
WASTE WATER
RADIOACTIVE WASTE PROCESSING
DESIGN
PERFORMANCE
EQUILIBRIUM
ORNL
OAK RIDGE
CATIONS
STRONTIUM 90
CESIUM 137
CALCIUM
MAGNESIUM
SODIUM
052001
WASTE PROCESSING