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Phosphonium-Based Ionic Liquids for Efficient Extraction of Heavy Metals from Mine Tailings

Year: 2025

Type: conference-paper

Abstract: Phosphonium-based room temperature ionic liquids (ILs) have demonstrated remarkable properties for metal extraction applications.In this study, we investigated the potential of these ILs as environmentally friendly materials for extracting metals from mine tailings.Specifically, we synthesized Trihexyltetradecylphosphonium salicylate [PR4][TS] through a straightforward metathesis process employing thiosalicylic acid as the source of the anion.The synthesized IL was characterized using various techniques including FTIR, TGA, and UV-VIS.To evaluate its effectiveness in metal extraction, we varied the incubation time, temperature, and concentration, and observed simultaneous extraction of Cd, Cr, Cu, Pb, and Mn.Remarkably, the highest extraction efficiency reached 95.9% within 120 minutes at a 30% IL concentration under room temperature conditions.These results provide valuable insights into the potential use of phosphonium-based ILs as green materials for highly efficient metal extraction.

Source: Proceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES)

DOI: 10.5109/7395753