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Purification of Lithium Carbonate from Radioactive Contaminants Using a MnO2-Based Inorganic Sorbent

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Title
Purification of Lithium Carbonate from Radioactive Contaminants Using a MnO2-Based Inorganic Sorbent
Author(s)
Olga Gileva; Pabitra Aryal; JunSeok Choe; Yena Kim; Yeongduk Kim; Eunkyung Lee; Moo Hyun Lee; Milyutin, Vitaly; KeonAh Shin; Hyojin Yeon
Publication Date
2023-10
Journal
Inorganics (Basel), v.11, no.10
Publisher
MDPI AG
Abstract
The possibility of deep radiochemical purification of Li2CO3 has been examined in the context of the purification program of the AMoRE collaboration. In this experiment, commercial Li2CO3 was converted into LiNO3. Co-precipitation with inorganic salt-based carriers followed by membrane filtration and sorption using MDM inorganic sorbent methods were tested for the removal of alkaline-earth and transition metals, potassium, magnesium, aluminum, uranium, thorium, and radium. The calcium molybdate-based carrier was the most efficient for removing Th, U, and K. Subsequently, the radium, calcium, and barium contamination was removed with MDM sorbent. After the impurities’ removal, the final Li2CO3 product was synthesized with NH4HCO3 sludge. The separation factors were derived by means of ICP-MS and HPGe analyses of the initial material and the intermediate and final products. The study showed the optimum conditions of co-precipitation and sorption to reach a high yield and radiopurity of lithium carbonate used for low-radioactive-background experiments. The developed method is an important step toward performing next-generation large-scale (1-ton) neutrino experiments using Li-containing detectors. © 2023 by the authors.
URI
https://pr.ibs.re.kr/handle/8788114/14256
DOI
10.3390/inorganics11100410
ISSN
2304-6740
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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