Generation and transport properties of colloidal tri- and tetravalent actinide species in geologic environments
The formation of colloidal particle fractions of tri- and tetravalent actinides (Am(III), Th(IV), Pu) has been studied in aqueous solutions under various conditions. (Variations of nuclide concentration 10/sup -7/-10/sup -11/ M; pH 3-12; salt medium 0.01-1.0 M NaClO/sub 4/; storage time 6 h-6 months; temperature 5/sup 0/C, 25/sup 0/C, 70/sup 0/C). A large fraction of the nuclides is sorbed on the vessel walls, but there is also a formation of centrifugable particles. For americium this fraction has two maxima, at pH 5-8 and at pH above 12. For thorium and plutonium this fraction is very small except at pH about 12. In the pH-range 7-9, which is expected in underground waste repositories, the particle fractions do not seem to be highly mobile. Plutonium behaves very similar to thorium in all studied systems, so it is probably tetravalent to a large extent. 8 references, 5 figures, 1 table.
- Research Organization:
- Chalmers Univ. of Tech., Goeteborg, Sweden
- OSTI ID:
- 6073574
- Report Number(s):
- CONF-831174-; TRN: 85-006153
- Journal Information:
- Mater. Res. Soc. Symp. Proc.; (United States), Vol. 26; Conference: Materials Research Society annual meeting, Boston, MA, USA, 14 Nov 1983
- Country of Publication:
- United States
- Language:
- English
Similar Records
Annual Progress Report for the Period July 1961 Through June 1962
The coprecipitation of Pu and other radionuclides with CaCO[sub 3]
Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
54 ENVIRONMENTAL SCIENCES
AMERICIUM
RADIONUCLIDE MIGRATION
PLUTONIUM
THORIUM
AQUEOUS SOLUTIONS
CHEMICAL STATE
COLLOIDS
GROUND WATER
PH VALUE
RADIOACTIVE WASTE DISPOSAL
SORPTION
ACTINIDES
DISPERSIONS
ELEMENTS
ENVIRONMENTAL TRANSPORT
HYDROGEN COMPOUNDS
MANAGEMENT
MASS TRANSFER
METALS
MIXTURES
OXYGEN COMPOUNDS
SOLUTIONS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
WASTE DISPOSAL
WASTE MANAGEMENT
WATER
052002* - Nuclear Fuels- Waste Disposal & Storage
053000 - Nuclear Fuels- Environmental Aspects
520301 - Environment
Aquatic- Radioactive Materials Monitoring & Transport- Water- (1987)