Antimicrobial copper nanoparticles synthesized from waste printed circuit boards using advanced chemical technology

Maksym Tatariants; Samy Yousef; Sandra Sakalauskaitė; Rimantas Daugelavičius; Gintaras Denafas; Regita Bendikiene

doi:10.1016/j.wasman.2018.06.016

Antimicrobial copper nanoparticles synthesized from waste printed circuit boards using advanced chemical technology

Waste Manag. 2018 Aug:78:521-531. doi: 10.1016/j.wasman.2018.06.016. Epub 2018 Jun 23.

Authors

Maksym Tatariants¹, Samy Yousef², Sandra Sakalauskaitė³, Rimantas Daugelavičius³, Gintaras Denafas¹, Regita Bendikiene⁴

Affiliations

¹ Department of Environmental Technology, Faculty of Chemical Technology, Kaunas University of Technology, LT-51424 Kaunas, Lithuania.
² Department of Production Engineering, Faculty of Mechanical Engineering and Design, Kaunas University of Technology, LT-51424 Kaunas, Lithuania; Department of Production Engineering and Printing Technology, Akhbar Elyom Academy 6th of October, Egypt. Electronic address: ahmed.saed@ktu.edu.
³ Department of Biochemistry, Vytautas Magnus University, Kaunas, Lithuania.
⁴ Department of Production Engineering, Faculty of Mechanical Engineering and Design, Kaunas University of Technology, LT-51424 Kaunas, Lithuania.

PMID: 32559941
DOI: 10.1016/j.wasman.2018.06.016

Abstract

Waste Printed Circuit Boards (WPCBs) were classified as one of the most important resources for urban mining containing high purity Copper (Cu) and other valuable materials. Recently, a dissolution recycling approach enhanced by ultrasonic treatment succeeded in the liberation of Cu foils from WPCBs as received. This research aims to synthesize Copper Nanoparticles (Cu-NPs) from the recovered Cu by using an advanced chemistry approach to obtain nano-product with high added value taking into consideration environmental risks. The experiments were carried out on the Cu foils recovered from the three types of WPCBs with different purity of Cu (Motherboard, Video Card, and Random Access Memory (RAM)). The synthesis process was performed in two stages: (a) preparation of Copper (II) Sulfate aqueous solutions from the recovered Cu and (b) chemical reduction of solutions for synthesis of Cu-NPs by using Native Cyclodextrins (NCDs), particularly ß-NCD as stabilizers. The efficiency of the developed approach for raw material of different purity was assessed and the final yield and the estimated recovery cost of synthesized Cu-NPs were calculated with high accuracy as well as the properties of the synthesized Cu-NPs. The obtained Cu-NPs were examined using SEM-EDS, TEM, XRD, Raman Spectroscopy, and TGA. To maximize the potential biomedical application benefits, the antibacterial activity of Cu-NPs was investigated by the standard microdilution method for E. coli, P. aeruginosa, and S. aureus bacterial cultures. The results showed that the produced Cu-NPs had an average size of 7 nm and yield 90%, while the preparation costs were 6 times lower in comparison to the commercial counterparts. In addition, the results indicated that the synthesized Cu-NPs from RAM sample had a good antimicrobial action.

Keywords: Antimicrobial activity; Chemical treatment; Copper nanoparticles; Green chemistry; Recycling of Waste Printed Circuit Board (WPCB).