| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Engineering -- From Ideas to Practice: An EPD Symposium in Honor of Jiann-Yang Hwang
|
| Presentation Title |
Oxidation of Cyanide and Simultaneous Copper Electrodeposition from Electroplating Wastewater in an Electrochemical Reactor |
| Author(s) |
Yang Yang, Fujiu Nian, Dong Xu, Yahui Sun, Jiann-Yang Hwang, Peiyu Qiao, Zhixing Fu, Lili Xi |
| On-Site Speaker (Planned) |
Yahui Sun |
| Abstract Scope |
Copper was widely used in electroplating，and a lot of waste water was produced in the rinsing process. Copper-containing electroplating wastewater can be divided into cyanide wastewater and copper sulfate wastewater according to the difference of plating process. This study is to explore the feasibility of cyanide oxidation and cupric reduction in an electrochemical reactor using an anion exchange membrane as the diaphragm. In the anolyte compartment cyanide in the cyanide wastewater was oxidized to Cyanate, and furthermore, to Carbon dioxide and nitrogen. In the catholyte compartment cupric in the copper sulphate wastewater was restored to copper. This study showed that the dosage of sodium hypochlorite used in the cyanide oxidation was decreased from 95g/L to 15g/L and over 80% copper was recovered from copper sulphate wastewater by electrolysis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Hydrometallurgy, Electrometallurgy |