Geochemical Factors Affecting the Behavior of Antimony, Cobalt, Europium, Technetium, and Uranium in Vadose Zone Sediments
In developing the Field Investigation Report (FIR) for the Waste Management Area (WMA) S-SX at the Hanford Site, cesium-137 was the only gamma emitting radionuclide of concern (Knepp 2002). However, in WMA B-BX-BY, the spectral gamma logging data identify seven gamma emitting radionuclides, cesium-137, antimony-125, europium-152 and -154, cobalt-60, uranium-235 and -238 (DOE-GJPO 1998). The geochemical behaviors of several of these radionuclides, antimony-125 and the two europium isotopes, have not been extensively investigated at the Hanford Site. This task was initiated to assure that our understanding of the geochemical properties affecting the environmental behavior of these radionuclides reflects the current state of knowledge. A literature review was conducted to assess the important oxidation/reduction, aqueous speciation, solubility, and adsorption processes affecting the environmental behavior of antimony, cobalt, europium, technetium, and uranium in vadose zone sediments with low-organic matter content in semi-arid environments such as those at the Hanford Site. Technetium-99 was included in this task because of its importance in the long-term risk calculations. This report presents the results of this literature review.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 15004491
- Report Number(s):
- PNNL-14126; 820201000; TRN: US1005176
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORPTION
ANTIMONY
ANTIMONY 125
CESIUM 137
COBALT
COBALT 60
EUROPIUM
EUROPIUM 152
EUROPIUM ISOTOPES
GAMMA LOGGING
RADIOISOTOPES
SEDIMENTS
SOLUBILITY
TECHNETIUM
TECHNETIUM 99
URANIUM
URANIUM 235
WASTE MANAGEMENT
geochemistry
antimony
cobalt
europium
technetium
uranium
aqueous speciation
sorption
solubility
adsorption