Removal of alkali and transition metal ions from water with hydrophobic deep eutectic solvents

Dannie J G P van Osch; Dries Parmentier; Carin H J T Dietz; Adriaan van den Bruinhorst; Remco Tuinier; Maaike C Kroon

doi:10.1039/c6cc06105b

Removal of alkali and transition metal ions from water with hydrophobic deep eutectic solvents

Chem Commun (Camb). 2016 Sep 29;52(80):11987-11990. doi: 10.1039/c6cc06105b.

Authors

Dannie J G P van Osch¹, Dries Parmentier², Carin H J T Dietz³, Adriaan van den Bruinhorst⁴, Remco Tuinier¹, Maaike C Kroon⁵

Affiliations

¹ Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry and Institute for Complex Molecular Systems, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands. D.v.Osch@tue.nl.
² Separation Technology Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands. mkroon@pi.ac.ae and Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands.
³ Chemical Process Intensification, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands.
⁴ Separation Technology Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands. mkroon@pi.ac.ae.
⁵ Separation Technology Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands. mkroon@pi.ac.ae and The Petroleum Institute, Dept. of Chemical Engineering, P. O. Box 2533, Abu Dhabi, UAE.

PMID: 27711403
DOI: 10.1039/c6cc06105b

Abstract

Hydrophobic deep eutectic solvents were used for the first time for the removal of metal ions from non-buffered water. It was shown that the extraction occurs via an ion exchange mechanism in which all transition metal ions could be extracted with high distribution coefficients, even for high Co²⁺ concentrations and low DES/water mass ratios. Maximum extraction efficiency could be reached within 5 s and regeneration was possible.