Published 2015 | Version v1
Journal article Metadata-only

Intrinsic formation of nanocrystalline neptunium dioxide under neutral aqueous conditions relevant to deep geological repositories

Creators

  • 1. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstrasee 400, D-01328 Dresden, (Germany)
  • 2. Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf - HZDR, Bautzner Landstrasee 400, D-01328 Dresden, (Germany)
  • 3. The Rossendorf Beamline at the European Synchrotron Radiation Facility - ESRF, BP 220, F-38043 Grenoble, (France)
  • 4. Commissariat a l'energie atomique et aux energies alternatives - CEA, DEN, DEC, Cadarache, F-13108 Saint-Paul-Lez-Durance, (France)

Description

The dilution of aqueous neptunium carbonate complexes induces the intrinsic formation of nanocrystalline neptunium dioxide (NpO2) particles, which are characterised by UV/Vis and X-ray absorption spectroscopies and transmission electron microscopy. This new route of nanocrystalline NpO2 formation could be a potential scenario for the environmental transport of radionuclides from the waste repository (i.e. under near-field alkaline conditions) to the geological environment (i.e. under far-field neutral conditions). (authors)

Availability note (English)

Available from doi: http://dx.doi.org/10.1039/c4cc08103j

Additional details

Identifiers

DOI
10.1039/c4cc08103j;

Publishing Information

Journal Title
ChemComm
Journal Volume
51
Journal Page Range
p. 1301-1304
ISSN
1359-7345

INIS

Country of Publication
United Kingdom
Country of Input or Organization
France
INIS RN
49094465
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; S54: ENVIRONMENTAL SCIENCES;
Descriptors DEI
ABSORPTION SPECTROSCOPY; NEPTUNIUM OXIDES; RADIOACTIVE WASTE DISPOSAL; RADIOACTIVE WASTE STORAGE; RADIONUCLIDE MIGRATION; TRANSMISSION ELECTRON MICROSCOPY; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA
Descriptors DEC
ACTINIDE COMPOUNDS; CHALCOGENIDES; ELECTRON MICROSCOPY; ENVIRONMENTAL TRANSPORT; MANAGEMENT; MASS TRANSFER; MICROSCOPY; NEPTUNIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RADIOACTIVE WASTE MANAGEMENT; SPECTRA; SPECTROSCOPY; STORAGE; TRANSURANIUM COMPOUNDS; WASTE DISPOSAL; WASTE MANAGEMENT; WASTE STORAGE

Optional Information

Notes
36 refs.