/sup 234/U//sup 230/Th ratio as an indicator of redox state, and U/sub 2/, Th, and Ra behavior in Briney aquifers

Conference · Wed Jan 01 04:00:00 EST 1986 · Mater. Res. Soc. Symp. Proc.; (United States)

OSTI ID:5366762

Laul, J C; Smith, M R; Hubbard, N

The /sup 234/U//sup 230/Th ratio serves as an in-situ indicator of the redox state in groundwater aquifers. The higher this ratio, the more U there is in the +6 valance state and thus a less reducing environment. Radium sorption is retarded in the shallow aquifer and is dependent on the CaSO/sub 4/ content and the redox state. Relative to Ra, U and Th are highly sorbed. The total retardation factor for Th is approx. 1400 and mean sorption time for /sup 228/Th is approx. 10 days in the shallow zone. The desorption rate of Ra is significantly slower in the shallow than in the deep aquifer. There is no effect of colloids in brines.

• Research Organization: Pacific Northwest Lab., Richland, WA
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5366762
• Report Number(s): CONF-850995-
• Conference Information: Journal Name: Mater. Res. Soc. Symp. Proc.; (United States) Journal Volume: 50
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
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ALPHA DECAY RADIOISOTOPES
AQUIFERS
BRINES
ELEMENTS
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METALS
NUCLEI
RADIOACTIVE WASTE DISPOSAL
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RADIUM
REDOX POTENTIAL
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THORIUM ISOTOPES
UNDERGROUND DISPOSAL
URANIUM 234
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