Electrolytic Recovery of Gold from Electronic Scraps via Thiosulfate-Based Solutions
| Autor: | Guan-Ting Ye, 葉冠廷 |
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| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 In this study, the electrochemical reactor constructed by the structure design of batch reactor was used for the electrolysis process of gold-containing scraps in aqueous phase. The characterization of gold-containing scraps were analyzed and the experimental results indicated that the gold-containing scraps were layered metal structures that is copper plating nickel and gold, sequentially. The recovery of gold was investigated in an electrochemical batch reactor. The experimental results indicated that the gold distribution in sludge increase with increasing initial thiosulfate concentration. However, there was an obvious decrease between experiment and prediction when thiosulfate concentration was 0.5 M. The gold distribution in electrolysis of 0.4 M ammonium was the same as 0.5 M ammonium. The copper distribution in residual scraps of 0.4 M ammonium was higher than 0.5 M ammonium. The gold distribution in electrolyte was similar when copper concentration between 10 and 50 mM. The gold distribution in electrolyte was high, and the gold distribution in residual scraps was the lowest for nitrogen as purge gas. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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