Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and Electrodeposition
The metal-containing sludge generated from the printed circuit boards (PCBs) manufacturing has been recycled as a secondary resource of copper (Cu) rather than being treated as a hazardous solid waste. However, it should consider the complexity of processing and using of oxidizing or precipitation a...
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MDPI AG
2020-12-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/1/22 |
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| author | Ha Bich Trinh Jaeryeong Lee Seunghyun Kim Jae-chun Lee Juan Carlos Fuentes Aceituno Seokhoon Oh |
| author_facet | Ha Bich Trinh Jaeryeong Lee Seunghyun Kim Jae-chun Lee Juan Carlos Fuentes Aceituno Seokhoon Oh |
| author_sort | Ha Bich Trinh |
| collection | DOAJ |
| description | The metal-containing sludge generated from the printed circuit boards (PCBs) manufacturing has been recycled as a secondary resource of copper (Cu) rather than being treated as a hazardous solid waste. However, it should consider the complexity of processing and using of oxidizing or precipitation agents to dissolve and separate Cu from other impurities, especially iron (Fe). This study has combined the dissolution and separation step in one stage by integrated acid leaching and electrodeposition to simplify the recovery process, while maintaining the high efficiency of separation. The chemistry of acid leaching and electrodeposition of the metals demonstrated that the metals (Cu and Fe) in the sludge sample were dissolved in the H<sub>2</sub>SO<sub>4</sub> electrolyte, and Cu could be selectively deposited on the cathode based on the different potential conditions to reduce it on the cathode. The important factors affecting the deposition of Cu were investigated, finding the optimal conditions (current density 15 mA/cm<sup>2</sup>, H<sub>2</sub>SO<sub>4</sub> 100 g/L, Cu 20 g/L, at 45 °C, and for 6 h) which could completely recover Cu from the electrolyte in a selective manner. The obtained copper product possessed a high purity of >99% with adequately uniform morphology and an acceptable consumption of energy (1.7 kWh/kg). It is an effective and simple approach to reclaim the value metal copper from the industrial waste in one single stage of integrated extraction and refining. |
| first_indexed | 2024-03-10T13:44:50Z |
| format | Article |
| id | doaj.art-bbe14335108f424b818b4f7e37458e8e |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T13:44:50Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-bbe14335108f424b818b4f7e37458e8e2023-11-21T02:43:35ZengMDPI AGMetals2075-47012020-12-011112210.3390/met11010022Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and ElectrodepositionHa Bich Trinh0Jaeryeong Lee1Seunghyun Kim2Jae-chun Lee3Juan Carlos Fuentes Aceituno4Seokhoon Oh5Department of Integrated Energy and Infra System, Kangwon National University, Chuncheon, Gangwon-do 24341, KoreaDepartment of Integrated Energy and Infra System, Kangwon National University, Chuncheon, Gangwon-do 24341, KoreaDepartment of Integrated Energy and Infra System, Kangwon National University, Chuncheon, Gangwon-do 24341, KoreaResources Recycling, Korea University of Science and Technology, Daejeon 34113, KoreaCentro de Investigación y de Estudios Avanzados del IPN-Saltillo, Av. Industria Metalúrgica # 1062, Parque Industrial Saltillo Ramos Arizpe, Ramos Arizpe, Coahuila 25900, MexicoDepartment of Integrated Energy and Infra System, Kangwon National University, Chuncheon, Gangwon-do 24341, KoreaThe metal-containing sludge generated from the printed circuit boards (PCBs) manufacturing has been recycled as a secondary resource of copper (Cu) rather than being treated as a hazardous solid waste. However, it should consider the complexity of processing and using of oxidizing or precipitation agents to dissolve and separate Cu from other impurities, especially iron (Fe). This study has combined the dissolution and separation step in one stage by integrated acid leaching and electrodeposition to simplify the recovery process, while maintaining the high efficiency of separation. The chemistry of acid leaching and electrodeposition of the metals demonstrated that the metals (Cu and Fe) in the sludge sample were dissolved in the H<sub>2</sub>SO<sub>4</sub> electrolyte, and Cu could be selectively deposited on the cathode based on the different potential conditions to reduce it on the cathode. The important factors affecting the deposition of Cu were investigated, finding the optimal conditions (current density 15 mA/cm<sup>2</sup>, H<sub>2</sub>SO<sub>4</sub> 100 g/L, Cu 20 g/L, at 45 °C, and for 6 h) which could completely recover Cu from the electrolyte in a selective manner. The obtained copper product possessed a high purity of >99% with adequately uniform morphology and an acceptable consumption of energy (1.7 kWh/kg). It is an effective and simple approach to reclaim the value metal copper from the industrial waste in one single stage of integrated extraction and refining.https://www.mdpi.com/2075-4701/11/1/22copperselective recoveryindustrial sludgeacid leachingelectrodeposition keyword |
| spellingShingle | Ha Bich Trinh Jaeryeong Lee Seunghyun Kim Jae-chun Lee Juan Carlos Fuentes Aceituno Seokhoon Oh Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and Electrodeposition Metals copper selective recovery industrial sludge acid leaching electrodeposition keyword |
| title | Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and Electrodeposition |
| title_full | Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and Electrodeposition |
| title_fullStr | Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and Electrodeposition |
| title_full_unstemmed | Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and Electrodeposition |
| title_short | Selective Recovery of Copper from Industrial Sludge by Integrated Sulfuric Leaching and Electrodeposition |
| title_sort | selective recovery of copper from industrial sludge by integrated sulfuric leaching and electrodeposition |
| topic | copper selective recovery industrial sludge acid leaching electrodeposition keyword |
| url | https://www.mdpi.com/2075-4701/11/1/22 |
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