Novel thiosalicylate-based ionic liquids for heavy metal extractions

作者：Leyma Raphlin; Platzer Sonja; Jirsa Franz; Kandioller Wolfgang^*; Krachler Regina; Keppler Bernhard K

来源：Journal of Hazardous Materials, 2016, 314: 164-171.

DOI：10.1016/j.jhazmat.2016.04.038

• Ionic liquid
• Heavy metal
• Heavy metal extraction
• Thiosalicylic acid

This study aims to develop novel ammonium and phosphonium ionic liquids (ILs) with thiosalicylate (TS) derivatives as anions and evaluate their extracting efficiencies towards heavy metals in aqueous solutions. Six ILs were synthesized, characterized, and investigated for their extracting efficacies for cadmium, copper, and zinc. Liquid-liquid extractions of Cu, Zn, or Cd with ILs after 1-24h using model solutions (pH 7; 0.1 M CaCl2) were assessed using flame atomic absorption spectroscopy (F-AAS). Phosphonium-based ILs trihexyltetradecylphosphonium 2-(propylthio)benzoate [P-66614][PTB] and 2-(benzylthio)benzoate [P-66614][BTB] showed best extraction efficiency for copper and cadmium, respectively and zinc was extracted to a high degree by [P-66614][BTB] exclusively.

• 出版日期2016-8-15