Novel thiosalicylate-based ionic liquids for heavy metal extractions

JOURNAL OF HAZARDOUS MATERIALS

卷:314

Article

Leyma, Raphlin¹  Platzer, Sonja¹  Jirsa, Franz^1,2  Kandioller, Wolfgang¹  Krachler, Regina¹  Keppler, Bernhard K.¹ 

[1] Univ Vienna, Inst Inorgan Chem, Fac Chem, Waehringer Str 42, A-1090 Vienna, Austria

[2] Univ Johannesburg, Dept Zool, POB 524, ZA-2006 Johannesburg, South Africa

关键词: Ionic liquid;    Heavy metal;    Heavy metal extraction;    Thiosalicylic acid;   

DOI  :  10.1016/j.jhazmat.2016.04.038

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free