Influence of carbonate complexes on uranium migration through abyssal red clays

Technical Report · Thu Sep 01 04:00:00 EDT 1983

OSTI ID:5678118

Bunker, B C; Erickson, K L

Diffusion experiments have been conducted to study the interactions between uranyl carbonate complexes and abyssal red clays. Experimental results indicate that in pH 8.8 solutions containing high concentrations of bicarbonate, uranyl carbonate complexes migrate rapidly through the clay samples. At lower pH values and bicarbonate concentrations, the uranyl carbonate complexes are converted to uranyl hydroxide complexes which are strongly sorbed by the clays and do not migrate. A competitive equilibrium model has been developed which explains these results, and which can be used to define the chemical environments in which uranium migration through the red clays should be rapid. 10 references.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5678118
• Report Number(s): SAND-83-1153; ON: DE84000685
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
ACTINIDES
ADSORPTION
ALKALI METALS
ALKALINE EARTH METALS
AMERICIUM
BARIUM
BOROSILICATE GLASS
CARBON COMPOUNDS
CARBONATES
CERIUM
CESIUM
CLAYS
COMPLEXES
CURIUM
DATA
DIFFUSION
DISSOLUTION
DISTRIBUTION FUNCTIONS
ELEMENTS
ENVIRONMENTAL TRANSPORT
EUROPIUM
EXPERIMENTAL DATA
FUNCTIONS
GADOLINIUM
GLASS
INFORMATION
LEACHING
MASS TRANSFER
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
PLUTONIUM
PROMETHIUM
RADIONUCLIDE MIGRATION
RARE EARTHS
RUBIDIUM
SEDIMENTS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
STRONTIUM
SURFACE PROPERTIES
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
URANIUM
URANIUM COMPLEXES
URANIUM COMPOUNDS
URANYL COMPLEXES
URANYL COMPOUNDS