Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Olga Gileva
* ORCID logo ,
Pabitra Arial
,
JunSeok Choe
,
Yena Kim
,
Yeongduk Kim
ORCID logo ,
Eun Kyung Lee
,
Moo Hyun Lee
ORCID logo ,
Vitaly Milyutin
,
KeonAh Shin
,
Hyojin Yeon
Version 1 : Received: 7 September 2023 / Approved: 8 September 2023 / Online: 8 September 2023 (10:33:02 CEST)

A peer-reviewed article of this Preprint also exists.

Gileva, O.; Aryal, P.; Choe, J.; Kim, Y.; Kim, Y.; Lee, E.; Lee, M.H.; Milyutin, V.; Shin, K.; Yeon, H. Purification of Lithium Carbonate from Radioactive Contaminants Using a MnO2-Based Inorganic Sorbent. Inorganics 2023, 11, 410. Gileva, O.; Aryal, P.; Choe, J.; Kim, Y.; Kim, Y.; Lee, E.; Lee, M.H.; Milyutin, V.; Shin, K.; Yeon, H. Purification of Lithium Carbonate from Radioactive Contaminants Using a MnO2-Based Inorganic Sorbent. Inorganics 2023, 11, 410.

Abstract

The possibility of deep radiochemical purification of Li2CO3 has been examined in the frame of the purification program of 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 contaminations were 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, 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.

Keywords

lithium carbonate; lithium nitrate; radiochemical purification; co-precipitation; membrane filtration; sorption; MnO2-based inorganic sorbent; AMoRE experiment

Subject

Chemistry and Materials Science, Inorganic and Nuclear Chemistry

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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