A study of strontium and cesium sorption on granite

Journal Article · Mon Nov 01 04:00:00 EST 1982 · Nucl. Technol.; (United States)

OSTI ID:7177893

Skagius, K; Neretnieks, I; Svedberg, G

Sorption experiments have been performed to determine the diffusion and sorption properties of cesium and strontium in crushed granite particles with one granite from Finnsjoen outside Forsmark on the east coast of Sweden, and one granite from the Stripa mine in central Sweden. Granite samples have been crushed and screened, and six different particle size fractions from 0.10 to 0.12 mm and 4 to 5 mm of each rock have been used in the experiments. The initial concentrations of inactive cesium and strontium were 10 to 15 ppm. A ''synthetic'' groundwater was used. The adsorption isotherm was found to be linear for strontium but nonlinear for cesium. One conclusion from this is that a prediction of cesium migration velocity from one single distribution coefficient is inappropriate. The experimental data indicate that the amount of sorption is dependent not only on the mass of granite particles but also to some extent on the size of the particles. A distinction has been made between sorption on external surfaces and inner surfaces. The amount of external surface adsorption was found to vary from 15 to 40% of the total adsorption capacity for the particle size fraction of 0.10 to 0.12 mm to a few percent or less for the largest particles used. Except for the largest particles, the experimentally determined diffusivities were found to lie in the interval expected from literature data on electric conductivities. The diffusivities were found to increase with increasing particle size.

• Research Organization: Royal Institute of Technology (KTH) Department of Chemical Engineering, S-100 44 Stockholm
• OSTI ID: 7177893
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 59:2; ISSN NUTYB
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ADSORPTION
ADSORPTION ISOTHERMS
ALKALI METALS
ALKALINE EARTH METALS
BENCH-SCALE EXPERIMENTS
CESIUM
CRYSTAL STRUCTURE
DATA
DIFFUSION
ELEMENTS
ENVIRONMENTAL TRANSPORT
EUROPE
EXPERIMENTAL DATA
GEOLOGIC DEPOSITS
GRAIN BOUNDARIES
GRANITES
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN COMPOUNDS
IGNEOUS ROCKS
INFORMATION
ISOTHERM
MANAGEMENT
MASS TRANSFER
MATERIALS
METALS
MICROSTRUCTURE
NUMERICAL DATA
OXYGEN COMPOUNDS
PARTICLE SIZE
PLUTONIC ROCKS
QUANTITY RATIO
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
RADIONUCLIDE MIGRATION
ROCK-FLUID INTERACTIONS
ROCKS
SAMPLE PREPARATION
SCANDINAVIA
SIZE
SORPTION
SORPTIVE PROPERTIES
STRONTIUM
SURFACE PROPERTIES
SWEDEN
UNDERGROUND DISPOSAL
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WATER
WESTERN EUROPE