Humate complexation of neptunium(V) and its modeling
Book
·
OSTI ID:382892
- Kyoto Univ., Osaka (Japan). Research Reactor Inst.
- Kyoto Univ. (Japan). Dept. of Nuclear Engineering
The complexation behavior of Np(V) with humate was investigated by spectrophotometry in the pH range from 5.7 to 10 in 0.01--0.5M NaClO{sub 4}. The absorption peaks of NpO{sub 2}{sup +} and Np(V) humate were observed at 979.6 nm and 989.9 nm, respectively, and the apparent complexation constant of the Np(V) humate was found to be pH-dependent. A two-site complexation model was applied to the interpretation of the observed pH-dependence by considering the participation of the two functional groups of carboxylate and phenolate. The dissociation and complexation constants of both functional groups were determined.
- OSTI ID:
- 382892
- Report Number(s):
- CONF-941075--; ISBN 1-55899-253-7
- Country of Publication:
- United States
- Language:
- English
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