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LithiumLithium extractionExtraction from spodumene processing generates significant amounts of aluminosilicate tailings. This study demonstrates a novel “closing the loop” approach by synthesizing high performance zeolite XZeolite X from lithiumLithium spodumene tailingsSpodumene tailings directly. The fast kinetics, two step fusion-hydrothermal method successfully produced a highly crystalline zeolite NaX in a template-free, additional Si-source-free condition. The optimum conditions are alkali fusion at 600 ℃ for 20 min followed by 2 h of hydrothermal synthesis at 95 ℃. The composition and textural properties of the synthetic product were analysed using XRD, SEM, ICP, XRF, and N2 adsorptionAdsorption-desorption techniques. Zeolite NaX_2h has similar performance to commercial zeolite 13X, with a BET specific surface area of 409.1 m2/g. Batch adsorptionAdsorption experiments revealed the superior sorption performance of cobaltCobalt and nickelNickel ions from aqueous solutions with removal rates of 100% and 96.7%, respectively, with performance exceeding that of commercial zeolite XZeolite X. This research presents a sustainable pathway to transform industrial waste into valuable adsorbents, offering an eco-friendly, economically viable, and simplified strategy for both tailings management and efficient recoveryRecovery of important battery metal ions, thereby fostering a more circular supply chainSupply chains.

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Closing the Loop: Enhanced Adsorption of Metals Using Zeolite X Synthesized from Spodumene Tailings

  • 会议论文

  • 发表日期：

    2026年

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  • Tseveenkhuu Darinchuluun,
  • Hong Peng,
  • John Vogrin,
  • James Vaughan

摘要

LithiumLithium extractionExtraction from spodumene processing generates significant amounts of aluminosilicate tailings. This study demonstrates a novel “closing the loop” approach by synthesizing high performance zeolite XZeolite X from lithiumLithium spodumene tailingsSpodumene tailings directly. The fast kinetics, two step fusion-hydrothermal method successfully produced a highly crystalline zeolite NaX in a template-free, additional Si-source-free condition. The optimum conditions are alkali fusion at 600 ℃ for 20 min followed by 2 h of hydrothermal synthesis at 95 ℃. The composition and textural properties of the synthetic product were analysed using XRD, SEM, ICP, XRF, and N2 adsorptionAdsorption-desorption techniques. Zeolite NaX_2h has similar performance to commercial zeolite 13X, with a BET specific surface area of 409.1 m2/g. Batch adsorptionAdsorption experiments revealed the superior sorption performance of cobaltCobalt and nickelNickel ions from aqueous solutions with removal rates of 100% and 96.7%, respectively, with performance exceeding that of commercial zeolite XZeolite X. This research presents a sustainable pathway to transform industrial waste into valuable adsorbents, offering an eco-friendly, economically viable, and simplified strategy for both tailings management and efficient recoveryRecovery of important battery metal ions, thereby fostering a more circular supply chainSupply chains.