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This study presents a sustainable method to purify pyrite (byproduct of coal mining) increasing its purity from less than 10% to approximately 80% using an aqueous solution of lithium heteropolytungstate (LST), a non-toxic substance that enables separation through simple sedimentation processes. The purified pyrite was then used, in combination with polymers—polystyrene (PS) and polyacrylonitrile (PAN)—for the development of novel composite filaments by electrospinning and wet-spinning techniques.

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Sustainable Alternatives for the Beneficiation of Pyrite from Coal Mining Waste Envisioning Future Technological Applications

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  • 发表日期：

    2026年

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  • Suzane Quintana Gomes,
  • Adilson Américo,
  • Luiz Fernando Belchior Ribeiro,
  • Fernando Ely,
  • Elidio Angioletto,
  • Eduardo Junca,
  • Ismael Raitz,
  • Tiago Elias Allievi Frizon

摘要

This study presents a sustainable method to purify pyrite (byproduct of coal mining) increasing its purity from less than 10% to approximately 80% using an aqueous solution of lithium heteropolytungstate (LST), a non-toxic substance that enables separation through simple sedimentation processes. The purified pyrite was then used, in combination with polymers—polystyrene (PS) and polyacrylonitrile (PAN)—for the development of novel composite filaments by electrospinning and wet-spinning techniques.