Extractant and solvent selection to recover zinc from a mining effluent

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Abstract

The feasibility of three commercial extractants (DEHPA, Cyanex 272, and Ionquest 290) has been assessed for the recovery of Zn from an acidic mine effluent. Less than 5 min are required to reach equilibrium for the studied extractants. Regarding selectivity, DEHPA extracted efficiently Zn, Ca, Mn, and Al, although Al remained in the solvent extract after stripping, hindering the solvent reuse. Neither Ionquest 290 nor Cyanex 272 extract Al, Cu, Mn, or Ca significantly. Ionquest 290 recovery of Zn is 5-10% higher than Cyanex 272. In addition, 20%(v/v) Ionquest 290 produces higher recoveries than 40%(v/v) DEHPA, thus Ionquest 290 has been selected as the most suitable among the extractants studied. © Taylor & Francis Group, LLC.
Original languageEnglish
Pages (from-to)384-397
JournalSolvent Extraction and Ion Exchange
Volume29
DOIs
Publication statusPublished - 1 May 2011

Keywords

  • Cyanex 272
  • DEHPA
  • Ionquest 290
  • Mining effluent
  • Solvent extraction
  • Zinc

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