Dear Dr. Sajjad Mohammadian,

the standard reduction potentials (E0) for the reduction of copper(II) and gallium(III), according to reactions (1) and (2), are reported to be 0.34 and −0.529 V versus the standard hydrogen electrode, respectively:

Cu2+ (aq) + 2e- → Cu (s) (1)

Ga3+ (aq) + 3e- → Ga (s) (2)

The differences in standard reduction potentials indicate that separation of copper from gallium should be possible to be done by electrodeposition.

For more details, please see the source of these info:

Investigation of an Electrochemical Method for Separation of Copper, Indium, and Gallium from Pretreated CIGS Solar Cell Waste Materials

Anna M. K. Gustafsson, Fredrik Björefors, Britt-Marie Steenari, and Christian Ekberg

The Scientific World Journal

Volume 2015, Article ID 494015, 11 pages (2015)

http://dx.doi.org/10.1155/2015/494015

Available also at: https://www.hindawi.com/journals/tswj/2015/494015/

Best regards, Pierluigi Traverso.

Dea Pierluigi,

I really appreciate your answer. I will read the paper.

Thanks again.

Best regards,

Sajjad

Thanks for the recent literature from Pierluigi Traverso. I became interested in scientific new developments.