Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 286, Issue 1, Pages 283-286Publisher
SPRINGER
DOI: 10.1007/s10967-010-0651-0
Keywords
Europium chloride; LiCl; Pyroprocessing; Molten salt; Potentiostatic method; Spectroscopy
Funding
- Korea Ministry of Education, Science and Technology (MEST)
- Korea University of Technology and Education
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The spontaneous reduction of Eu3+ to Eu2+ was examined when EuCl3 was added into a pyroprocessing media of LiCl molten salt at 923 K. The amount of Eu2+ was calculated by measuring the total charge consumed to oxidize Eu2+ ions to Eu3+ ions. The concentration ratio of Eu2+ to Eu3+ was estimated to be about 0.40 in the media. In addition, it is confirmed that the reduction of Eu3+ to Eu2+ is caused by the oxidation power of Cl- to Cl-2. The coexistence of Eu3+ and Eu2+ in the LiCl molten salt system was examined by UV-Visible and luminescence spectroscopy. The molar absorptivities of Eu3+ and Eu2+, calculated from UV-Visible absorption spectra, were 423 and 1954 M-1 cm(-1), respectively.
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