Published April 2005
| Version v1
Report
Study of the redox stability of Uranium (VI) in presence of humic substances
Creators
- 1. Forschungszentrum Rossendorf e.V. (Germany). Inst. of Radiochemistry
Description
We studied the stability of the oxidation state of U(VI) in the presence of natural humic acid from Aldrich and synthetic acids Hyd-Glu and Cat-Gly representing humic acid model substances with pronounced redox functionalities. Using laser-induced photoacoustic spectroscopy, we obtained the first spectroscopic proof for the reduction of U(VI) to U(IV) by synthetic humic acids. In contrast to that, no spectroscopic indications were found for an Aldrich humic acid-mediated reduction of U(VI). Therefore, we concluded that both humic acid-like products show higher U(VI) redox capacities compared to Aldrich humic acid. (orig.)
Additional details
Publishing Information
- Imprint Title
- Humic substances in performance assessment of nuclear waste disposal: Actinide and iodine migration in the far-field. Third technical progress report
- Imprint Pagination
- 190 p.
- Journal Page Range
- p. 9-18
- ISSN
- 0947-8620
- Report number
- FZKA--7070
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 36085165
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CHEMICAL STATE; HUMIC ACIDS; LASER SPECTROSCOPY; PHOTOACOUSTIC SPECTROSCOPY; REDUCTION; STABILITY; URANYL COMPOUNDS; VALENCE
- Descriptors DEC
- ACTINIDE COMPOUNDS; CHEMICAL REACTIONS; ORGANIC ACIDS; ORGANIC COMPOUNDS; SPECTROSCOPY; URANIUM COMPOUNDS