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 language | English |
|---|---|
| Pages (from-to) | 1308-1312 |
| Number of pages | 5 |
| Journal | Journal of Industrial and Engineering Chemistry |
| Volume | 20 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2014 Jul 25 |
| Externally published | Yes |
Bibliographical note
Funding Information:The authors gratefully acknowledge the Korea Institute of Energy Technology Evaluation and Planning for the financial support toward this study.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
Keywords
- Adsorption
- Dowex 21K XLT resin
- Gold-cyanide complex
- Removal
- Selectivity
ASJC Scopus subject areas
- General Chemical Engineering