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Effect of buffer on direct lithium extraction from Tibetan brine by formed titanium-based lithium ion sieves.
- Source :
- New Journal of Chemistry; 7/21/2024, Vol. 48 Issue 27, p12450-12459, 10p
- Publication Year :
- 2024
-
Abstract
- The adsorption performance of titanium-based lithium ion sieves for Li<superscript>+</superscript> through H<superscript>+</superscript>–Li<superscript>+</superscript> exchange is greatly limited by the pH value of brine. To improve the adsorption capacity of HTO-P (formed titanium-based lithium ion sieves) for Li<superscript>+</superscript>, the adsorption characteristics and dynamic performance in Tibetan brine–NaHCO<subscript>3</subscript> (NaHCO<subscript>3</subscript> as a buffer added into the brine used) were studied. The addition of NaHCO<subscript>3</subscript> reduces the aggregation of H<superscript>+</superscript> and maintains the pH value at ∼7.5, which also accelerates the mass transfer rate of Li<superscript>+</superscript> in the initial adsorption stage. Compared with Tibetan brine, the equilibrium adsorption capacity and recovery ratio of HTO-P for Li<superscript>+</superscript> in Tibetan brine–NaHCO<subscript>3</subscript> increase by 60% and 70%, respectively, and the adsorption equilibrium time is shortened by one-third. Moreover, the dynamic saturated adsorption capacity of HTO-P for Li<superscript>+</superscript> reaches 14.25 mg g<superscript>−1</superscript> in Tibetan brine–NaHCO<subscript>3</subscript>. This work provides a basis for the direct lithium adsorption and extraction process from salt lake brines. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 27
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 178314034
- Full Text :
- https://doi.org/10.1039/d4nj02205j