Electrolysis Recovery Copper from Waste Printed Circuit Boards

Posted: 27 Jun 2019

See all articles by Juanjuan Hao

Juanjuan Hao

Independent

Yishun Wang

Massey University

Fu Guo

Beijing University of Technology

Date Written: June 20, 2019

Abstract

Abstract: The content of copper in waste printed circuit boards (WPCBs) is richer than that in ores. Therefore, recovery copper from WPCBs could protect copper resources. In this paper, copper recovery from WPCBs was carried out electrolytically by using sulfuric acid-copper sulfate system. The chloride ion from NaCl acted as a catalyst during the electrolysis process. Effects of CuSO4•5H2O quantity, NaCl quantity, H2SO4 concentration, and current density on current efficiency, surface morphology of cathode copper, and growth orientation were discussed. The results showed that current efficiency improved rapidly with the increase of CuSO4•5H2O quality and H2SO4 concentration. The addition of NaCl improved the surface morphological density of the recovered copper, however, the purity of cathode copper decreased when the NaCl quantity was more than 0.6 g. Meanwhile, a rougher surface morphology was formed when the concentration of H2SO4 and current density were in a higher range due to the reaction of hydrogen with the cathode surface. Under the optimal conditions (100 g/L CuSO4•5H2O, 6 g/L NaCl, 1 mol/L H2SO4, 500 A/m2, 3 h), the current efficiency reached 99.91% and the purity of cathode copper was 99.71%, indicating an effective copper recovery from WPCB metal powders containing assorted types of elements.

Keywords: WPCBs; recovery; copper; electrolysis

Suggested Citation

Hao, Juanjuan and Wang, Yishun and Guo, Fu, Electrolysis Recovery Copper from Waste Printed Circuit Boards (June 20, 2019). Abstract Proceedings of 2019 International Conference on Resource Sustainability - Cities (icRS Cities). Available at SSRN: https://ssrn.com/abstract=3409622

Juanjuan Hao

Independent ( email )

No Address Available

Yishun Wang

Massey University ( email )

Private Bag 11 222
Palmerston North, Manawatu 4442
New Zealand

Fu Guo (Contact Author)

Beijing University of Technology ( email )

100 Ping Le Yuan
Chaoyang District
Beijing, Beijing 100020
China

Register to save articles to
your library

Register

Paper statistics

Abstract Views
56
PlumX Metrics