In situ analysis for spontaneous reduction of Eu3+ in LiCl pyroprocessing media at 923 K

Tack-Jin Kim; Yong-Kwang Jeong; Jun-Gill Kang; Yongju Jung; Do-Hee Ahn; Han-Soo Lee

doi:10.1007/s10967-010-0651-0

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 286: Issue 1

In situ analysis for spontaneous reduction of Eu³⁺ in LiCl pyroprocessing media at 923 K

Authors:

Tack-Jin Kim

Tack-Jin Kim Korea Atomic Energy Research Institute, Daejeon, 305-353 Korea

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Yong-Kwang Jeong

Yong-Kwang Jeong Department of Chemistry, Chungnam National University, Daejeon, 305-764 Korea

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Jun-Gill Kang

Jun-Gill Kang Department of Chemistry, Chungnam National University, Daejeon, 305-764 Korea

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Yongju Jung

Yongju Jung Department of Applied Chemical Engineering, Korea University of Technology and Education, Cheonan, 330-780 Korea

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Do-Hee Ahn

Do-Hee Ahn Korea Atomic Energy Research Institute, Daejeon, 305-353 Korea

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, and

Han-Soo Lee

Han-Soo Lee Korea Atomic Energy Research Institute, Daejeon, 305-353 Korea

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Pages:: 283–286

Online Publication Date:: 23 Jun 2010

Publication Date:: 01 Oct 2010

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-010-0651-0

Keywords:: Europium chloride; LiCl; Pyroprocessing; Molten salt; Potentiostatic method; Spectroscopy

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Abstract

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 Cl₂. 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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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)