Recovery of Zn from Unsorted Spent Batteries Using Solvent Extraction and Electrodeposition
Publication: Journal of Environmental Engineering
Volume 144, Issue 6
Abstract
This study focused on the selective recovery of zinc (Zn) from a leaching solution emerging from a sulfuric acid leaching process applied to unsorted spent batteries. Precipitation and solvent extraction were investigated. According to the results, solvent extraction using Cyanex 272 allowed for the selective removal of Zn from the solution containing high amounts of metals (, , , , and ). According to the results, the solvent extraction process was capable of recovering 97.6% of Zn from this leaching solution under the following conditions: two stages of extraction in the presence of an organic solution made of Cyanex 272 (30%, v/v) and tributylphosphate (TBP—2%, v/v) in kerosene, , organic/aqueous (O/A) ratio = 2/1, and . The Zn present in the organic phase was then stripped using 0.4 M with an O/A ratio fixed at 2/1. This stripping step allowed for the recovery of 81.8% of the Zn initially present in the organic phase. Subsequently, 82.4% of the Zn stripped in the aqueous solution was then electrically deposited after 3 h at with a current density fixed at .
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Acknowledgments
The authors acknowledge the Natural Sciences and Engineering Research Council of Canada for the financial support to this research (Grant No. RGPIN-2014-04794).
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 6 • June 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Feb 23, 2017
Accepted: Sep 18, 2017
Published online: Mar 16, 2018
Published in print: Jun 1, 2018
Discussion open until: Aug 16, 2018
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