| 학회 |
한국화학공학회 |
| 학술대회 |
2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 |
28권 1호, p.1184 |
| 발표분야 |
[주제 12] 화학공학일반(부문위원회 발표) |
| 제목 |
Direct conversion of copper present in waste printed circuit boards to oxidation-resistant electrical conductor employing eco-benign iron(III) sulfate and ascorbic acid |
| 초록 |
This study presents to directly convert Cu(0) present in waste printed circuit boards (WPCBs) to oxidation-resistant electrical conductor materials by an eco-benign hydrometallurgical process. In the leaching step, Fe2(SO4)3 was used instead of hazardous mineral acids to leach metals from the WPCBs via redox reaction (100 mM Fe2(SO4)3, 25°C, and 6h). From Fe2(SO4)3 multi-metal leachate, Cu(II) was then selectively separated and recovered as Cu(0) by the addition of ascorbic acid as an eco-benign reductant. Under the optimal separation conditions (70°C, 0.3M ascorbic acid, and 4 h), 95.6±0.4% Cu(0) was able to be recovered. The as-recovered Cu was compared and characterized with commercial Cu(0). The conductivity of commercial Cu(0) was decreased by 68% after 6 h under open-air conditions, while that of as-recovered Cu(0) was decreased by only 17%, demonstrating a remarkable oxidation resistance due to trace amount of Ag was also reduced. Consequently, these results provide a practical urban mining process for the conversion of Cu(0) in WPCBs into a value-added product. |
| 저자 |
Tran Duy Tho, Thao My Nguyen, Lin Xiaoyu, 최종원, 송명희, 윤영상
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| 소속 |
전북대 |
| 키워드 |
분리기술(Separation Technology) |
| E-Mail |
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| 원문파일 |
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