/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 00:00:00 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-
• Journal Information: Mater. Res. Soc. Symp. Proc.; (United States), Vol. 50; Conference: Materials Research Society international symposium, Stockholm, Sweden, 9 Sep 1985
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
RADIUM
SORPTION
THORIUM 230
URANIUM 234
AQUIFERS
BRINES
ISOTOPE RATIO
RADIOACTIVE WASTE DISPOSAL
REDOX POTENTIAL
UNDERGROUND DISPOSAL
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALINE EARTH METALS
ALPHA DECAY RADIOISOTOPES
ELEMENTS
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
MANAGEMENT
METALS
NUCLEI
RADIOISOTOPES
THORIUM ISOTOPES
URANIUM ISOTOPES
WASTE DISPOSAL
WASTE MANAGEMENT
YEARS LIVING RADIOISOTOPES
053000* - Nuclear Fuels- Environmental Aspects
052002 - Nuclear Fuels- Waste Disposal & Storage
520301 - Environment
Aquatic- Radioactive Materials Monitoring & Transport- Water- (1987)