CAS OpenIR
Recovery of high purity copper from waste printed circuit boards of mobile phones by slurry electrolysis with ammonia-ammonium system
Wang, Jiqin1; Chen, Shuyuan1; Zeng, Xiangfei1; Huang, Jinfeng1; Liang, Qian1; Shu, Jiancheng1; Chen, Mengjun1; Xiao, Zhengxue1; Zhao, Hongbo1,2; Sun, Zhi3
2021-11-15
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume275Pages:12
AbstractWaste printed circuit boards (WPCBs) are identified to be the most complex recycling materials among waste electrical and electronic equipment (WEEE). Slurry electrolysis with acidic system can directly separate and recover copper from WPCBs while current efficiency and purity were generally reduced due to deposition of impurity metals and the hydrogen evolution during recovery process. In ammonia-based system, copper can be selectively extracted and copper (II) ammine complexes generally react with metallic copper to form copper (I) ammine complexes, promoting current efficiency and purity. Therefore, an efficient ammonia-ammonium carbonate slurry electrolysis system is proposed for high purity copper recycling from waste printed circuit boards of mobile phones (WPCB-MPs). The factors affecting copper current efficiency and recovery rate are systematically discussed. These results indicate that appropriate increasing NH3 center dot H2O, (NH4)2CO3, Cu2+, NaCl concentration, solid-to-liquid ratio, current density and reaction time could effectively increase copper recovery rate and current efficiency. The current efficiency and recovery rate of copper are 95.2 and 90.4%, respectively under the optimum test conditions of 20 g/L Cu2+, 0.25 mol/L (NH4)2CO3, 4 mol/L NH3 center dot H2O, 30 g/L solid-to-liquid ratio, 1 mol/L NaCl, 20 mA/cm2, 3 h. Moreover, copper could be recovered at the cathode with a purity of 99.97%. Compared with acidic system, this study provides an efficient approach to recover high purity copper from WPCB-MPs, showing a prospective future for WEEE resource recycling.
KeywordWPCB-MPs Recycling Copper Slurry electrolysis Ammonia-ammonium carbonate
DOI10.1016/j.seppur.2021.119180
Language英语
WOS KeywordELECTRONIC WASTE ; METALS ; GENERATION ; MANAGEMENT ; LITHIUM ; CATHODE ; SULFATE ; POWDERS
Funding ProjectNational Natural Science Foundation of China[51974262] ; Science & Technology Pillar Program of Sichuan Province[2019YFS0450] ; Opening Project of Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education[19kfgk01]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Science & Technology Pillar Program of Sichuan Province ; Opening Project of Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education
WOS IDWOS:000696784000003
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50182
Collection中国科学院过程工程研究所
Corresponding AuthorChen, Mengjun
Affiliation1.Southwest Univ Sci & Technol, Key Lab Solid Waste Treatment & Resource Recycle, Minist Educ, Mianyang 621010, Peoples R China
2.Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jiqin,Chen, Shuyuan,Zeng, Xiangfei,et al. Recovery of high purity copper from waste printed circuit boards of mobile phones by slurry electrolysis with ammonia-ammonium system[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,275:12.
APA Wang, Jiqin.,Chen, Shuyuan.,Zeng, Xiangfei.,Huang, Jinfeng.,Liang, Qian.,...&Sun, Zhi.(2021).Recovery of high purity copper from waste printed circuit boards of mobile phones by slurry electrolysis with ammonia-ammonium system.SEPARATION AND PURIFICATION TECHNOLOGY,275,12.
MLA Wang, Jiqin,et al."Recovery of high purity copper from waste printed circuit boards of mobile phones by slurry electrolysis with ammonia-ammonium system".SEPARATION AND PURIFICATION TECHNOLOGY 275(2021):12.
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