Preliminary characterization of materials for a reactive transport model validation experiment

Conference · Thu Dec 30 23:00:00 EST 1993

OSTI ID:60863

Siegel, M D; Ward, D B; Cheng, W C; Bryant, C; Chocas, C S; Reynolds, C G ^[1]

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1. Sandia National Labs., Albuquerque, NM (United States)

The geochemical properties of a porous sand and several tracers (Ni, Br, and Li) have been characterized for use in a caisson experiment designed to validate sorption models used in models of reactive transport. The surfaces of the sand grains have been examined by a combination of techniques including potentiometric titration, acid leaching, optical microscopy, and scanning electron microscopy with energy-dispersive spectroscopy. The surface studies indicate the presence of small amounts of carbonate, kaolinite and iron-oxyhydroxides. Adsorption of nickel, lithium and bromide by the sand was measured using batch techniques. Bromide was not sorbed by the sand. A linear (K{sub d}) or an isotherm sorption model may adequately describe transport of Li; however, a model describing the changes of pH and the concentrations of other solution species as a function of time and position within the caisson and the concomitant effects on Ni sorption may be required for accurate predictions of nickel transport.

• Research Organization: American Nuclear Society, La Grange Park, IL (United States); American Society of Civil Engineers, New York, NY (United States)
• OSTI ID: 60863
• Report Number(s): CONF-930408--Vol.1
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
54 ENVIRONMENTAL SCIENCES
ADSORPTION
BROMIDES
ENVIRONMENTAL TRANSPORT
FLOW MODELS
GEOCHEMISTRY
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
LITHIUM
NICKEL
OPTICAL MICROSCOPY
RADIONUCLIDE MIGRATION
SAND
SCANNING ELECTRON MICROSCOPY
TITRATION
TRACER TECHNIQUES
UNDERGROUND DISPOSAL
VALIDATION
Yucca Mountain Project