Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 314, Issue -, Pages 164-171Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.04.038
Keywords
Ionic liquid; Heavy metal; Heavy metal extraction; Thiosalicylic acid
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Funding
- FWF Austrian Science Fund [P 24676-N19]
- Austrian Science Fund (FWF) [P 24676] Funding Source: researchfish
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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. (C) 2016 The Authors. Published by Elsevier B.V.
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