Selective adsorption of the gold-cyanide complex from waste rinse water using Dowex 21K XLT resin

Yong Sik Ok, Choong Jeon

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The Dowex 21K XLT resin which is a strong basic resin was used to selectively adsorb gold-cyanide complex only, in the actual waste rinse water which coexisted with lead-cyanide complexes. The existence of gold-cyanide complex on the surface of the Dowex 21K XLT resin was proved by SEM and EDX analysis. The maximum removal efficiency value for gold-cyanide complex was about 93% for 10. g/L of resin concentration while adsorption for lead-cyanide complexes did not almost happen at pH 13. The adsorption capacity of Dowex 21K XLT resin for gold and lead-cyanide complexes was about 32 and 0.8. mg/g-dry mass, respectively. Also, most of adsorption process for gold-cyanide complex was completed within 1. h. The exothermic nature of gold-cyanide complex adsorption onto the Dowex 21K XLT resin was revealed because the removal efficiency for gold-cyanide somewhat decreased as temperature increased. It was concluded that the Dowex 21K XLT resin, which has excellent selectivity to gold-cyanide complex, can be applied to the recovery system for gold-cyanide complex in actual waste rinse water.

Original languageEnglish
Pages (from-to)1308-1312
Number of pages5
JournalJournal of Industrial and Engineering Chemistry
Volume20
Issue number4
DOIs
Publication statusPublished - 2014 Jul 25

Keywords

  • Adsorption
  • Dowex 21K XLT resin
  • Gold-cyanide complex
  • Removal
  • Selectivity

ASJC Scopus subject areas

  • Chemical Engineering(all)

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