This Review provides an overview of valuable metals, the supply of which has been classified as critical for Europe. Starting with a description of the current state of the art, novel approaches for their recovery from primary resources are presented as well as recycling processes. The focus lies on developments since 2005. Chemistry strategies which are used in metal recovery are summarized on the basis of the individual types of deposit and mineral. In addition, the economic importance as well as utilization of the metals is outlined.
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http://dx.doi.org/10.1002/anie.201605417 | DOI Listing |
J Hazard Mater
September 2024
College of Materials of Xiamen University, Xiamen, 361005, China; Shenzhen Research Institute of Xiamen University, Shenzhen, 518055, China. Electronic address:
The treatment of spent cemented carbides using the conventional alkali-acid leaching process results in the generation of hazardous solid waste tungsten leaching residue. This study proposed an alternative process using the alkali-treated tungsten leaching residue (AW-residue) without the acid leaching step, preserving Co in the residue. By using photovoltaic silicon kerf waste (SKW) as a reducing agent, heavy metals (Co, Ni, W, Nb, and Ta) were efficiently extracted from AW-residue and a Co-rich alloy was obtained.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
June 2024
Association Burkinabe Pour La Promotion de L'Emploi Vert (ABPEV), Ouagadougou, Burkina Faso.
Sci Total Environ
June 2024
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Henan Critical Metals Institue, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, Henan, PR China. Electronic address:
RSC Adv
January 2024
Institute of Resources and Environment Engineering, State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Shanxi University Taiyuan 030006 P. R. China
Extraction of valuable metals besides silica from high-alumina fly ash is one of the most important high-value utilization pathways. However, it is difficult to realize high-efficiency extraction due to the stable structure of quartz and mullite. In this paper, mineral phase transformation for valuable metal recovery and mesoporous silica preparation from fly ash by a selective acid leaching method was proposed.
View Article and Find Full Text PDFJ Environ Manage
December 2023
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China. Electronic address:
The metal resource crisis and the inherent need for a low-carbon circular economy have driven the rapid development of e-waste recycling technology. High-value waste printed circuit boards (WPCBs) are an essential component of e-waste. However, WPCBs are considered hazardous to the ecosystem due to the presence of heavy metals and brominated organic polymers.
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