Task-specific thioglycolate ionic liquids for heavy metal extraction: Synthesis, extraction efficacies and recycling properties

JOURNAL OF HAZARDOUS MATERIALS

卷:324

Article

Platzer, Sonja¹  Kar, Mega²  Leyma, Raphlin¹  Chib, Sonia¹  Roller, Alexander¹  Jirsa, Franz^1,3  Krachler, Regina¹  MacFarlane, Douglas R.²  Kandioller, Wolfgang¹  Keppler, Bernhard K.¹ 

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

[2] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[3] Univ Johannesburg, Dept Zool, POB 524,Auckland Pk, ZA-2006 Johannesburg, South Africa

关键词: Thioglycolic acid;    Task-specific ionic liquids;    Heavy metal extraction;    Immobilization;    Reusability;   

DOI  :  10.1016/j.jhazmat.2016.10.054

来源: Elsevier

【 摘 要 】

Eight novel task-specific ionic liquids (TSIIs) based on the thioglycolate anion designed for heavy metal extraction have been prepared and characterized by H-1 and C-13 NMR, UV-Vis, infrared, ESI-MS, conductivity, viscosity, density and thermal properties. Evaluation of their time-resolved extraction abilities towards cadmium(II) and copper(II) in aqueous solutions have been investigated where distribution ratios up to 1200 were observed. For elucidation of the IL extraction mode, crystals were grown where CO.) was converted with an excess of S-butyl thioglycolate. It was found by X-ray diffraction analysis that cadmium is coordinated by five oxygen and one sulfur donor atoms provided by two thioglycolate molecules and one water molecule. Leaching behavior of the hydrophobic ionic liquids into aqueous systems was studied by TOC (total dissolved organic carbon) measurements. Additionally, the immobilization on polypropylene was elucidated and revealed slower metal extraction rates and Similar leaching behavior. Finally, recovery processes for cadmium and copper after extraction were performed and recyclability was successfully proven for both metals. (C) 2016 The Author(s). Published by Elsevier B.V.

【 授权许可】

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