IMR OpenIR
Liquid-liquid hierarchical separation and metal recycling of waste printed circuit boards
Chen, Bin; He, Jie; Xi, Yaoyao; Zeng, Xiangfeng; Kaban, Ivan; Zhao, Jiuzhou; Hao, Hongri
2019-02-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume364Pages:388-395
AbstractWaste electrical and electronic equipment is rapidly increasing worldwide, resulting in a large quantity of waste printed circuit boards (WPCBs). There is a great challenge on how to efficiently separate mixed metals in WPCBs, which consists of more than 10 elements including hazardous Cr, Pb and Cd. In this work, based on atomic interactions, a method of liquid-liquid hierarchical separation is developed to separate the mixed metals dissociated from the pyrolyzed WPCBs of mobile phones. The hierarchical separation of L -> LFe-rich + L-cu,L-Pb-rich, L-Cu,L-Pb-rich -> Lcu-rich + Lpb-rich and Lpb-rich -> SCu-dendritical + Lpb-rich produces four immiscible Fe-rich, Cu-rich, Cu-dendritical and Pb-rich substances. The separation rate between these substances can reach more than 96% in a super-gravity field of G = 1000g. Other metals selectively distribute in the four substances. The Fe-rich substance collects Cr, Co, Ni and Si. Almost all of Au and Ag are trapped in the Cu-rich and Cu-dendritical substances. The low-melting-point metals, i.e. Bi, Cd, In and Sn, are located in the Pb-rich substance. This work provides a green shortcut for efficiently separating and recycling overall metals in WPCBs.
KeywordWaste printed circuit boards Metal recycling Liquid-liquid phase separation Immiscible alloys Super-gravity technology Pyrolysis
Indexed BySCI
Language英语
WOS IDWOS:000452926500043
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81375
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Chen, Bin,He, Jie,Xi, Yaoyao,et al. Liquid-liquid hierarchical separation and metal recycling of waste printed circuit boards[J]. JOURNAL OF HAZARDOUS MATERIALS,2019,364:388-395.
APA Chen, Bin.,He, Jie.,Xi, Yaoyao.,Zeng, Xiangfeng.,Kaban, Ivan.,...&Hao, Hongri.(2019).Liquid-liquid hierarchical separation and metal recycling of waste printed circuit boards.JOURNAL OF HAZARDOUS MATERIALS,364,388-395.
MLA Chen, Bin,et al."Liquid-liquid hierarchical separation and metal recycling of waste printed circuit boards".JOURNAL OF HAZARDOUS MATERIALS 364(2019):388-395.
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