Published 2016 | Version v1
Journal article Metadata-only

Photoreduction of Pu(V,VI) by TiO2

Creators

  • 1. Lomonosov Moscow State Univ. (Russian Federation). Dept. of Chemistry
  • 2. National Research Centre, Moscow (Russian Federation). Kurchatov Institute
  • 3. RAS, Moscow (Russian Federation). Vernadsky Inst. of Geochemistry and Analytical Chemistry
  • 4. RAS, Moscow (Russian Federation). Frumkin Inst. of Physical Chemistry and Electrochemistry

Description

In this study, the effect of light on the kinetics and speciation of plutonium at its interaction with particles of TiO2 under different light conditions is shown for the first time. It was found that sorption was followed by reduction of the plutonium to Pu(IV). In this, the reduction reaction and sorption in conditions of the presence of light proceed significantly more rapidly due to the photocatalytic activity of titanium dioxide, providing a source of electrons for the reaction. Spectral methods (XAFS and TEM) showed that plutonium forms nanoclusters with the structure of PuO2, which decorate the surface of the solid phase.

Additional details

Publishing Information

Journal Title
Radiochimica Acta
Journal Volume
104
Journal Issue
12
Journal Page Range
p. 843-851
ISSN
0033-8230
CODEN
RAACAP

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
48030020
Subject category
S54: ENVIRONMENTAL SCIENCES;
Descriptors DEI
ABSORPTION SPECTRA; CHEMICAL STATE; LEACHING; NANOSTRUCTURES; NUCLEAR TEST SITES; PH VALUE; PHOTOCATALYSIS; PHOTOCHEMICAL REACTIONS; PLUTONIUM IONS; RADIATION ACCIDENTS; RADIOACTIVE WASTE DISPOSAL; RADIOCHEMISTRY; RADIONUCLIDE MIGRATION; REACTOR ACCIDENTS; REDOX REACTIONS; REDUCTION; SOLID CLUSTERS; SORPTION; SURFACE CONTAMINATION; TITANIUM COMPOUNDS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY SPECTROSCOPY
Descriptors DEC
ACCIDENTS; CATALYSIS; CHARGED PARTICLES; CHEMICAL REACTIONS; CHEMISTRY; CONTAMINATION; DISSOLUTION; ELECTRON MICROSCOPY; ENVIRONMENTAL TRANSPORT; IONS; MANAGEMENT; MASS TRANSFER; MICROSCOPY; RADIOACTIVE WASTE MANAGEMENT; SEPARATION PROCESSES; SPECTRA; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS; WASTE DISPOSAL; WASTE MANAGEMENT