Design of zeolite ion-exchange columns for wastewater treatment
Oak Ridge National Laboratory plans to use chabazite zeolites for decontamination of wastewater containing parts-per-billion levels of {sup 90}Sr and {sup 137}Cs. Treatability studies indicate that such zeolites can remove trace amounts of {sup 90}Sr and {sup 137}Cs from wastewater containing high concentrations of calcium and magnesium. These studies who that zeolite system efficiency is dependent on column design and operating conditions. Previous results with bench-scale, pilot-scale, and near-full-scale columns indicate that optimized design of full-scale columns could reduce the volume of spent solids generation by one-half. The data indicate that shortcut scale-up methods cannot be used to design columns to minimize secondary waste generation. Since the secondary waste generation rate is a primary influence on process cost effectiveness, a predictive mathematical model for column design is being developed. Equilibrium models and mass-transfer mechanisms are being experimentally determined for isothermal multicomponent ion exchange (Ca, Mg, Na, Cs, and Sr). Mathematical models of these data to determine the breakthrough curves for different column configurations and operating conditions will be used to optimize the final design of full-scale treatment plant. 32 refs., 6 figs., 3 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6026835
- Report Number(s):
- CONF-911133-4; ON: DE92001959
- Resource Relation:
- Conference: American Institute of Chemical Engineers (AIChE) annual meeting, Los Angeles, CA (United States), 17-22 Nov 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CESIUM 137
REMOVAL
STRONTIUM 90
WASTE WATER
DECONTAMINATION
ION EXCHANGE
MATHEMATICAL MODELS
PARTICLE SIZE
WATER TREATMENT
ZEOLITES
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
CLEANING
EVEN-EVEN NUCLEI
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
INTERMEDIATE MASS NUCLEI
ION EXCHANGE MATERIALS
ISOTOPES
LIQUID WASTES
MATERIALS
MINERALS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
RADIOISOTOPES
SILICATE MINERALS
SIZE
STRONTIUM ISOTOPES
WASTES
WATER
YEARS LIVING RADIOISOTOPES
052001* - Nuclear Fuels- Waste Processing