Extraction of copper(II) ions from aqueous solutions with a methimazole-based ionic liquid

Reyna-González, Juan M., Torriero, Angel A. J., Siriwardana, Amal I., Burgar, Iko M. and Bond, Alan M. 2010, Extraction of copper(II) ions from aqueous solutions with a methimazole-based ionic liquid, Analytical chemistry, vol. 82, no. 18, pp. 7691-7698, doi: 10.1021/ac101321a.

Attached Files
Name Description MIMEType Size Downloads

Title Extraction of copper(II) ions from aqueous solutions with a methimazole-based ionic liquid
Author(s) Reyna-González, Juan M.
Torriero, Angel A. J.ORCID iD for Torriero, Angel A. J. orcid.org/0000-0001-8616-365X
Siriwardana, Amal I.
Burgar, Iko M.
Bond, Alan M.
Journal name Analytical chemistry
Volume number 82
Issue number 18
Start page 7691
End page 7698
Total pages 8
Publisher American Chemical Society
Place of publication Chapel Hill, N.C.
Publication date 2010-08-25
ISSN 0003-2700
Summary The recently synthesized ionic liquid (IL) 2-butylthiolonium bis(trifluoromethanesulfonyl)amide, [mimSBu][NTf2], has been used for the extraction of copper(II) from aqueous solution. The pH of the aqueous phase decreases upon addition of [mimSBu]+, which is attributed to partial release of the hydrogen attached to the N(3) nitrogen atom of the imidazolium ring. The presence of sparingly soluble water in [mimSBu][NTf2] also is required in solvent extraction studies to promote the incorporation of Cu(II) into the [mimSBu][NTf2] ionic liquid phase. The labile copper(II) system formed by interacting with both the water and the IL cation component has been characterized by cyclic voltammetry as well as UV−vis, Raman, and 1H, 13C, and 15N NMR spectroscopies. The extraction process does not require the addition of a complexing agent or pH control of the aqueous phase. [mimSBu][NTf2] can be recovered from the labile copper−water−IL interacting system by washing with a strong acid. High selectivity of copper(II) extraction is achieved relative to that of other divalent cobalt(II), iron(II), and nickel(II) transition-metal cations. The course of microextraction of Cu2+ from aqueous media into the [mimSBu][NTf2] IL phase was monitored in situ by cyclic voltammetry using a well-defined process in which specific interaction with copper is believed to switch from the ionic liquid cation component, [mimSBu], to the [NTf2] anion during the course of electrochemical reduction from Cu(II) to Cu(I). The microextraction−voltammetry technique provides a fast and convenient method to determine whether an IL is able to extract electroactive metal ions from an aqueous solution.
Language eng
DOI 10.1021/ac101321a
Field of Research 030604 Electrochemistry
030102 Electroanalytical Chemistry
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30038926

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
GTP Research
Connect to link resolver
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 50 times in TR Web of Science
Scopus Citation Count Cited 51 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 697 Abstract Views, 2 File Downloads  -  Detailed Statistics
Created: Mon, 24 Oct 2011, 07:52:04 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.