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Article

Sorption Extraction of Lithium from the Brines of the Pre-Aral Region Using Ion-Exchangers Under Static Conditions

by
Yelena Bochevskaya
1,
Elmira Sargelova
1,2,*,
Ainash Sharipova
1,*,
Salikha Kilibayeva
1 and
Zhansaya Yakhiyayeva
1
1
D.V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry JSC, Almaty 050013, Kazakhstan
2
Department of Metallurgy and Mineral Processing, Satbayev University, Almaty 050013, Kazakhstan
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2025, 15(17), 9248; https://doi.org/10.3390/app15179248
Submission received: 16 July 2025 / Revised: 14 August 2025 / Accepted: 18 August 2025 / Published: 22 August 2025

Abstract

Samples of gel-type cation exchangers of the TOKEM nomenclature were tested for lithium extraction from multicomponent natural brines. The dependencies of the extraction of Li and other impurities—Na, Ca, and Mg—on the duration of the sorption process for the tested ion-exchange resins under static conditions are presented. Metal ions can be arranged according to the degree of extraction for each ion exchanger in a row: Ca2+ < Mg2+ < Li+, Na+. Testing of ion exchangers under static conditions on technological Li-containing solutions confirms the applicability of TOKEM-140 and TOKEM-160 cation exchangers for lithium extraction. For TOKEM-140, lithium extraction over time varies from 76.2% to 73.8% and for TOKEM-160—from 73.8% to 72.4%. The ionic background of natural brines has a significant effect on the capacity of ion exchangers for lithium and forms the following series Li⁺ << Mg2⁺ < Ca²⁺ << Na⁺ relative to the obtained concentrations of metal ions in natural brine. The overlay of IR spectra of TOKEM-140 and TOKEM-160 ion exchangers before and after saturation shows slight changes in their appearance, indicating that the lithium sorption process has occurred. The values of static exchange capacity (SEC) for TOKEM-140 and TOKEM-160 cation exchangers are identical.
Keywords: brines; lithium; macro impurities; cation exchangers; sorption; static conditions; extraction; static capacity brines; lithium; macro impurities; cation exchangers; sorption; static conditions; extraction; static capacity

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MDPI and ACS Style

Bochevskaya, Y.; Sargelova, E.; Sharipova, A.; Kilibayeva, S.; Yakhiyayeva, Z. Sorption Extraction of Lithium from the Brines of the Pre-Aral Region Using Ion-Exchangers Under Static Conditions. Appl. Sci. 2025, 15, 9248. https://doi.org/10.3390/app15179248

AMA Style

Bochevskaya Y, Sargelova E, Sharipova A, Kilibayeva S, Yakhiyayeva Z. Sorption Extraction of Lithium from the Brines of the Pre-Aral Region Using Ion-Exchangers Under Static Conditions. Applied Sciences. 2025; 15(17):9248. https://doi.org/10.3390/app15179248

Chicago/Turabian Style

Bochevskaya, Yelena, Elmira Sargelova, Ainash Sharipova, Salikha Kilibayeva, and Zhansaya Yakhiyayeva. 2025. "Sorption Extraction of Lithium from the Brines of the Pre-Aral Region Using Ion-Exchangers Under Static Conditions" Applied Sciences 15, no. 17: 9248. https://doi.org/10.3390/app15179248

APA Style

Bochevskaya, Y., Sargelova, E., Sharipova, A., Kilibayeva, S., & Yakhiyayeva, Z. (2025). Sorption Extraction of Lithium from the Brines of the Pre-Aral Region Using Ion-Exchangers Under Static Conditions. Applied Sciences, 15(17), 9248. https://doi.org/10.3390/app15179248

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