Excitation and Emission Properties of Adsorbed U(VI) on Amorphous Silica Surface

In the geochemical field, the chemical speciation of hexavalent uranium (U(VI)) has been widely investigated by performing measurements to determine its luminescence properties, namely the excitation, emission, and lifetime. Of these properties, the excitation has been relatively overlooked in most...

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Bibliographic Details
Published in:Journal of nuclear fuel cycle and waste technology (Online) 2020, 18(4), , pp.497-508
Main Authors: Jung, Euo Chang, Kim, Tae-Hyeong, Kim, Hee-Kyung, Cho, Hye-Ryun, Cha, Wansik
Format: Article
Language:English
Subjects:
원자력공학
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Summary:In the geochemical field, the chemical speciation of hexavalent uranium (U(VI)) has been widely investigated by performing measurements to determine its luminescence properties, namely the excitation, emission, and lifetime. Of these properties, the excitation has been relatively overlooked in most time-resolved laser fluorescence spectroscopy (TRLFS) studies. In this study, TRLFS and continuous-wave excitation–emission matrix spectroscopy are adopted to characterize the excitation properties of U(VI) surface species that interact with amorphous silica. The luminescence spectra of U(VI) measured from a silica suspension and silica sediment showed very similar spectral shapes with similar lifetime values. In contrast, the excitation spectra of U(VI) measured from these samples were significantly different. The results show that distinctive excitation maxima appeared at approximately 220 and 280 nm for the silica suspension and silica sediment, respectively. KCI Citation Count: 0
ISSN:1738-1894
2288-5471
DOI:10.7733/jnfcwt.2020.18.4.497