期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 298, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2022.121657
关键词
Electronic waste; Printed circuit boards; Cu; Recycling; Peroxymonosulfate
资金
- National Natural Science Foundation of China [22006091, 42007107]
- Natural Science Foundation of Fujian Province [2021J05183, 2022J05227]
- Fujian Provincial Department of Educational Project [JAT190513]
Cu from waste printed circuit boards (PCBs) was successfully recovered as CuO particles with high specific surface area and rich oxygen vacancies. These particles showed comparable performance to commercial CuO in activating peroxymonosulfate to degrade reactive blue 19, demonstrating their potential application in wastewater treatment.
Waste printed circuit boards (PCBs), a common electronic waste, contain a high content of Cu. For environmental sustainability and economic benefit, it is necessary to recover the Cu as high value-added product instead of discarding it. In this work, Cu from PCBs was successfully recovered as CuO particles with high specific surface area and rich oxygen vacancies through cyclic leaching, chemical precipitation, low temperature aging, and calcination. Compared with CuO prepared from commercial Cu(NO3)(2).5H(2)O, the PCBs-derived CuO (PCBs-CuO) exhibited comparable performance in activating peroxymonosulfate to degrade reactive blue 19, although its crystallinity and phase purity were relatively lower. Additionally, PCBs-CuO had an outstanding pH tolerance (2-12), confirming the practical application potential of PCBs-CuO in the removal of organic contaminants in various wastewater. Moreover, the quenching experiments, electrochemical measurements and electron para-magnetic resonance analysis suggested that O-1(2) and .OH played a significant role in PCBs-CuO/peroxymonosulfate system. The equivalent to Cu(II) and oxygen vacancies on the surface of PCBs-CuO was mainly respon-sible for the activation of peroxymonosulfate. This work provides a promising method for recycling metal from waste PCBs into high-effective peroxymonosulfate activator and simultaneously achieving environmental remediation.
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