Influence of humic-acid complexing on the mobility of Americium in the soil aquatic environment
Description
Diffusion data indicate the Am, Cm and Np migrate 1.2, 0.8, and 26 centimeters, respectively, in a thousand years. Thus, excluding mass transport by moving water or wind, actinide elements, such as Cm, Am, and Np that find their way to the soil-aquatic environment are relatively immobile. Measured diffusion coefficients, corrected for distribution between the aqueous and soil phases, tortuosity, negative absorption, and relative fluidity are in reasonable agreement with aqueous diffusion coefficients. However, agreement depends strongly on measurement method used to determine distribution ratios. Two sets of experiments with /sup 241/Am and /sup 152/Eu tracers have been done to … continued below
Physical Description
13 pages
Creation Information
Sheppard, J.C.; Campbell, M.J. & Kittrick, J.A. March 1, 1982.
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Washington State Univ., Pullman (USA)
Place of Publication: United States
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Description
Diffusion data indicate the Am, Cm and Np migrate 1.2, 0.8, and 26 centimeters, respectively, in a thousand years. Thus, excluding mass transport by moving water or wind, actinide elements, such as Cm, Am, and Np that find their way to the soil-aquatic environment are relatively immobile. Measured diffusion coefficients, corrected for distribution between the aqueous and soil phases, tortuosity, negative absorption, and relative fluidity are in reasonable agreement with aqueous diffusion coefficients. However, agreement depends strongly on measurement method used to determine distribution ratios. Two sets of experiments with /sup 241/Am and /sup 152/Eu tracers have been done to measure distribution ratios as a function of the aqueous humic acid concentration. In the first experiments the solid phase was kaolinite and in the second series of distribution ratios were measured with Burbank sandy loam. Both of these experiments indicated that Am(III) and Eu(III) form very strong humic acid complexes with formation constants of approximately 10/sup 5/. Additional experiments are being done to establish the average number of Am(III)s or Eu(III)s bound to the humic acid polymer.
Physical Description
13 pages
Notes
NTIS, PC A02/MF A01.
Subjects
Keywords
- Actinide Isotopes
- Actinide Nuclei
- Actinides
- Alpha Decay Radioisotopes
- Aluminium Compounds
- Aluminium Silicates
- Americium
- Americium 241
- Americium Isotopes
- Bench-Scale Experiments
- Beta Decay Radioisotopes
- Beta-Minus Decay Radioisotopes
- Beta-Plus Decay Radioisotopes
- Complexometry
- Curium
- Data
- Diffusion
- Electron Capture Radioisotopes
- Elements
- Environmental Transport
- Europium 152
- Europium Isotopes
- Experimental Data
- Geologic Deposits
- Heavy Nuclei
- Hours Living Radioisotopes
- Humic Acids
- Information
- Intermediate Mass Nuclei
- Isotope Applications
- Isotopes
- Kaolinite
- Loam
- Management
- Mass Transfer
- Metals
- Minerals
- Neptunium
- Nuclei
- Numerical Data
- Odd-Even Nuclei
- Odd-Odd Nuclei
- Organic Acids
- Organic Compounds
- Oxygen Compounds
- Radioactive Waste Disposal
- Radioisotopes
- Radionuclide Migration
- Rare Earth Isotopes
- Rare Earth Nuclei
- Silicate Minerals
- Silicates
- Silicon Compounds
- Soils
- Tracer Techniques
- Transplutonium Elements
- Transuranium Elements
- Underground Disposal
- Waste Disposal
- Waste Management
- Years Living Radioisotopes 053000* -- Nuclear Fuels-- Environmental Aspects
STI Subject Categories
- 052002 -- Nuclear Fuels-- Waste Disposal & Storage
- 11 Nuclear Fuel Cycle And Fuel Materials
- 12 Management Of Radioactive And Non-Radioactive Wastes From Nuclear Facilities
- 510301 -- Environment, Terrestrial-- Radioactive Materials Monitoring & Transport-- Soil-- (-1987)
- 520301 -- Environment, Aquatic-- Radioactive Materials Monitoring & Transport-- Water-- (1987)
- 54 Environmental Sciences
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- Other: DE82013666
- Report No.: DOE/EV/73012-2
- Grant Number: AT06-76EV73012
- Digital Object Identifier: https://doi.org/10.2172/5292679
- Office of Scientific & Technical Information Report Number: 5292679
- Archival Resource Key: ark:/67531/metadc1068039
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- March 1, 1982
Added to The UNT Digital Library
- Feb. 4, 2018, 10:51 a.m.
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- June 26, 2019, 1:07 p.m.
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Sheppard, J.C.; Campbell, M.J. & Kittrick, J.A. Influence of humic-acid complexing on the mobility of Americium in the soil aquatic environment, report, March 1, 1982; United States. (https://digital.library.unt.edu/ark:/67531/metadc1068039/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.