Published 2002
| Version v1
Book
Neptunium(5) complexation by various humic acids in solution studied by EXAFS and NIR spectroscopy
Creators
- 1. Forschungszentrum Rossendorf e.V. (FZR) (Germany). Inst. fuer Radiochemie
Description
The structure of Np(V) humic acid (HA) complexes at pH 7 was studied by EXAFS. For the first time, the influence of phenolic OH groups on the complexation of HA and Np(V) in the neutral pH range was investigated using a modified natural HA with blocked phenolic OH groups and Bio-Rex70, a cation exchange resin having carboxyl groups as proton exchanging sites. Near-infrared (NIR) spectroscopic measurements verified the formation of Np(V) humates under the applied conditions. Co-ordination numbers and bond distances were determined for the axial and equatorial co-ordination shells of neptunium. These were compared to structural parameters of Np(V) hydrates and carboxylates. (authors)
Additional details
Publishing Information
- Publisher
- Organisation for Economic Co-Operation and Development - Nuclear Energy Agency
- Imprint Place
- Paris (France)
- ISBN
- 92-64-18485-6
- Imprint Title
- Speciation, techniques and facilities for radioactive materials at synchrotron light sources
- Imprint Pagination
- 378 p.
- Journal Page Range
- p. 277-284
Conference
- Title
- Workshop on Speciation, techniques and facilities for radioactive materials at synchrotron light sources
- Dates
- 10-12 Sep 2000
- Place
- Grenoble (France)
INIS
- Country of Publication
- France
- Country of Input or Organization
- Nuclear Energy Agency of the OECD (NEA)
- INIS RN
- 33046389
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ABSORPTION SPECTROSCOPY; BOND LENGTHS; COORDINATION NUMBER; HUMIC ACIDS; INFRARED SPECTRA; NEPTUNIUM; NEPTUNIUM COMPLEXES; X-RAY SPECTROSCOPY
- Descriptors DEC
- ACTINIDE COMPLEXES; ACTINIDES; COMPLEXES; DIMENSIONS; ELEMENTS; LENGTH; METALS; ORGANIC ACIDS; ORGANIC COMPOUNDS; SPECTRA; SPECTROSCOPY; TRANSURANIUM COMPLEXES; TRANSURANIUM ELEMENTS
Optional Information
- Notes
- 17 refs.