Modeling strontium-cesium-calcium-magnesium-sodium ion exchange equilibria on chabazite with the Wilson equation

Conference · Tue Sep 01 04:00:00 EDT 1992

OSTI ID:10171308

Perona, J J

Chabazite zeolites are used at ORNL for decontamination of wastewaters containing {sup 90}Sr and {sup 137}Cs. Treatability studies have shown that chabazite can remove trace amounts of these nuclides from wastewaters containing much higher concentrations of calcium and magnesium. The design of ion exchange columns for multicomponent systems requires a method for predicting multicomponent equilibria from binary or ternary experiments, since the number of experiments required for an empirical equilibrium model is generally not feasible. Binary interaction parameters for the Wilson equation were used to predict solid-phase activity coefficients for the five-component system, and the sum of squares of deviations between experimental and predicted solution concentrations for the data points available was calculated. The average deviation per data point for the five-component system was about the same as for the calcium-magnesium-sodium ternary system.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10171308
• Report Number(s): CONF-921104--3; ON: DE92019944
• Country of Publication: United States
• Language: English

Related Subjects

052001
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
540330
CALCIUM
CESIUM
DECONTAMINATION
EQUILIBRIUM
ION EXCHANGE
MAGNESIUM
ORNL
RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
RADIOACTIVE WASTE PROCESSING
REACTION KINETICS
SODIUM
STRONTIUM
THERMODYNAMIC ACTIVITY
WASTE PROCESSING
WASTE WATER
WATER TREATMENT
ZEOLITES