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September 15, 2026SeparationsOpen Access

Comparative Investigation of Natural Mineral-Supported Li/Al-LDHs Adsorbents for Lithium Recovery from High Mg/Li Ratio Brines

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Authors

PLPing LiuWuhan University of Science and TechnologyCZChuntao ZhangChina TobaccoJGJun GuoWuhan University of Science and Technology

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Implication

Experimental study demonstrates efficient lithium recovery in high magnesium-to-lithium brines using montmorillonite-supported adsorbents, indicating a scalable pathway for mineral-based extraction.

Key Points

  • To synthesize and evaluate natural clay mineral-supported lithium–aluminum-layered double hydroxide composites for selective lithium extraction from brines with high magnesium-to-lithium ratios.
  • Synthesized composite adsorbents via mineral-directed growth of lithium–aluminum-layered double hydroxides onto three natural clay matrices: chlorite, montmorillonite, and illite.
  • Assessed lithium adsorption capacity, selectivity, and structural stability across static tests and continuous-flow conditions using brine with a magnesium-to-lithium ratio of 61.25.
  • Montmorillonite-supported composites achieved a lithium adsorption capacity of 6.0 mg·g−1 with a lithium-to-magnesium separation factor of 73.5 in brine containing a magnesium-to-lithium ratio of 61.25.
  • The optimized adsorbent preserved 81.7% of its initial adsorption capacity across 100 adsorption–desorption cycles and maintained stable lithium recovery during continuous-flow operation.

Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/6aa913ba9013453be30a1ce0https://doi.org/10.3390/separations13090259
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