Selective recovery of Au(III), Pt(IV), and Pd(II) from aqueous solutions by liquid-liquid extraction using ionic liquid Aliquat-336

Wei Wei, Chul Woong Cho, Sok Kim, Myung Hee Song, John Kwame Bediako, Yeoung Sang Yun

Research output: Contribution to journalArticlepeer-review

146 Citations (Scopus)

Abstract

In this study, selective extraction and recovery of Au(III) from a tertiary metal solution containing Au(III), Pt(IV), and Pd(II) were investigated using ionic liquid Aliquat-336. The effects of Aliquat-336 concentration, solution pH, extraction time, and initial multi-metal concentration were examined in details. From the extraction efficiency and selectivity coefficient (αsel), it was noted that Aliquat-336 was a very fast and effective extractant for selective extraction of Au(III) from the multi-metal solutions. Through sequential extraction, high purity of each metal solution was separately obtained from low and high concentrations of multi-metal solutions. Therefore, the present study suggests a new way to separate and recover precious metals of high purities using ionic liquids.

Original languageEnglish
Pages (from-to)18-24
Number of pages7
JournalJournal of Molecular Liquids
Volume216
DOIs
Publication statusPublished - 1 Apr 2016
Externally publishedYes

Keywords

  • Aliquat-336
  • Ionic liquid
  • Precious metals
  • Selective extraction
  • Separation

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