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

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:7103302

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: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7103302
• Report Number(s): CONF-921104-3; ON: DE92019944
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
540330 -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1990-)
ALKALI METALS
ALKALINE EARTH METALS
CALCIUM
CESIUM
CLEANING
DECONTAMINATION
ELEMENTS
EQUILIBRIUM
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
KINETICS
LIQUID WASTES
MAGNESIUM
MANAGEMENT
MATERIALS
METALS
MINERALS
NATIONAL ORGANIZATIONS
ORNL
OXYGEN COMPOUNDS
PROCESSING
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
REACTION KINETICS
SILICATE MINERALS
SODIUM
STRONTIUM
THERMODYNAMIC ACTIVITY
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT
ZEOLITES