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

Conference ·
OSTI ID:5353146
; ;
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 state and thus a lesser reducing environment. Radium is retarded in the shallow aquifer and its sorption is dependent on the CaSO/sub 4/ content and 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. 6 refs., 5 figs., 2 tabs.
Research Organization:
Pacific Northwest Labs., Richland, WA (USA); Battelle Memorial Inst., Columbus, OH (USA)
DOE Contract Number:
AC06-76RL01830
OSTI ID:
5353146
Report Number(s):
PNL-SA-12978; CONF-850995-3; ON: DE85017927
Country of Publication:
United States
Language:
English

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54 ENVIRONMENTAL SCIENCES
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
AQUIFERS
BRINES
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHEMICAL REACTIONS
CORRELATIONS
DATA
DAYS LIVING RADIOISOTOPES
DESORPTION
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GROUND WATER
HEAVY NUCLEI
HYDROGEN COMPOUNDS
INFORMATION
ISOTOPES
MASS TRANSFER
NATURAL RADIOACTIVITY
NUCLEI
NUMERICAL DATA
OXIDATION
OXYGEN COMPOUNDS
PALO DURO BASIN
PERMIAN BASIN
QUANTITY RATIO
RADIOACTIVITY
RADIOECOLOGICAL CONCENTRATION
RADIOISOTOPES
RADIONUCLIDE MIGRATION
RADIUM 226
RADIUM ISOTOPES
RADON 222
RADON ISOTOPES
REDUCTION
SORPTION
SORPTIVE PROPERTIES
SULFATES
SULFUR COMPOUNDS
SURFACE PROPERTIES
THORIUM 230
THORIUM ISOTOPES
URANIUM 234
URANIUM ISOTOPES
WATER
YEARS LIVING RADIOISOTOPES