SORPTION OF CESIUM BY SOILS AND ITS DISPLACEMENT BY SALT SOLUTIONS
Cesium was sorbed by montmorillonite, illite, and kaolinite in quantities corresponding to exchange saturation and was displaced readily on leaching with 1N KCl or CaCl/sub 2/. Vermiculite and heated (600 deg C, 12 hr) K- montmorillonite bound Cs tightly against displacement by CaCl/sub 2/ and AlCl/sub 3/, but not by KCl or NH/sub 4/Cl. Prolonged leaching with 1N KCl removed 97.5% of the Cs sorbed by heated Kmontmorillonite, while lN CaCl/sub 2/ eventually displaced 88%. Potassium and Rb sorbed on vermiculite were displaced more rapidly by Ca or Mg than by monovalent ions, but this was not the case with hented K-montmorillonite. The exchange-displacement behavior of Cs on vermiculite and heated K-montmorillonite suggests that the ion is unique in that its sorption in interlayer spaces leads to interplanar distances that admit K and NH/sub 4/ ions but greatly restrict the entry of Ca. Cesium, then, is not expected to follow the fixation-release rules that have been developed for K and NH/sub 4/. Heated montmorillonite samples leached with mixtures of CsCl and other salts sorbed more Cs when the complementary ion was Ca or Al than when it was K or NH/sub 4/. Differences were especially pronounced at low equivalent fractions of Cs in the leaching solution, showing a larger preference by exchange sites for Cs over divalent than over monovalent ions. Apparent specific sorption of Cs against exchange with CaCl/sub 2/ occurred at quite large Cs saturations. (auth)
- Research Organization:
- Univ. of California, Riverside
- NSA Number:
- NSA-17-039072
- OSTI ID:
- 4628706
- Journal Information:
- Soil Sci. Soc. Am. Proc., Journal Name: Soil Sci. Soc. Am. Proc. Vol. Vol: 27
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Studies on the sorption and fixation of cesium by vermiculite
DESORPTION OF MICRO-QUANTITIES OF STRONTIUM AND CAESIUM FROM MONTMORILLONITE AND KAOLINITE
Related Subjects
ALUMINUM CHLORIDES
ALUMINUM COMPOUNDS
ALUMINUM SILICATES
ALUMINUM SULFATES
AMMONIUM COMPOUNDS
BINDING ENERGY
CALCIUM
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CATIONS
CESIUM
CESIUM CHLORIDES
CESIUM COMPOUNDS
CHEMISTRY
CHLORIDES
CLAYS
EFFICIENCY
HEAT TREATMENTS
HEATING
HIGH TEMPERATURE
ILLITE
ION EXCHANGE
ION EXCHANGE MATERIALS
KAOLINITE
LAYERS
LEACHING
MAGNESIUM
MAGNESIUM COMPOUNDS
MINERALS
MIXING
MONTMORILLONITE
OPENINGS
POTASSIUM
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RUBIDIUM
RUBIDIUM COMPOUNDS
SALTS
SOILS
SOLUTIONS
TESTING
VERMICULITE