SELECTIVE ELECTROEXTRACTION OF BASE METALS FROM LEACHING SOLUTIONS OBTAINED DURING THE RECYCLING OF WASTE PRINTED CIRCUIT BOARDS. II. SELECTIVE POTENTIOSTATIC ELECTRODEPOSITION OF COPPER, TIN AND LEAD

Marian-Iosif FRÎNCU; Eniko COVACI; Sorin-Aurel DORNEANU; Petru ILEA

doi:10.24193/subbchem.2021.2.12

SELECTIVE ELECTROEXTRACTION OF BASE METALS FROM LEACHING SOLUTIONS OBTAINED DURING THE RECYCLING OF WASTE PRINTED CIRCUIT BOARDS. II. SELECTIVE POTENTIOSTATIC ELECTRODEPOSITION OF COPPER, TIN AND LEAD

Authors

Marian-Iosif FRÎNCU Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Department of Chemical Engineering, 11 Arany Janos Street, Cluj-Napoca, RO-400028, Romania. https://orcid.org/0000-0001-9821-4995
Eniko COVACI Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Department of Chemical Engineering, 11 Arany Janos Street, Cluj-Napoca, RO-400028, Romania. https://orcid.org/0000-0002-8453-9155
Sorin-Aurel DORNEANU Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Department of Chemical Engineering, 11 Arany Janos Street, Cluj-Napoca, RO-400028, Romania; Babeş-Bolyai University, Interdisciplinary Research Institute on Bio Nano Sciences, 42 Treboniu Laurian Street, Cluj-Napoca, RO-400271, Romania. * Corresponding author: sorin.dorneanu@ubbcluj.ro https://orcid.org/0000-0002-2690-6383
Petru ILEA Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Department of Chemical Engineering, 11 Arany Janos Street, Cluj-Napoca, RO-400028, Romania; Babeş-Bolyai University, Interdisciplinary Research Institute on Bio Nano Sciences, 42 Treboniu Laurian Street, Cluj-Napoca, RO-400271, Romania. https://orcid.org/0000-0002-4334-2735

DOI:

https://doi.org/10.24193/subbchem.2021.2.12

Keywords:

waste printed circuit boards, potentiostatic selective electroextraction, copper recovery, tin and lead alloy electrodeposition.

Abstract

This paper presents our results concerning the feasibility of selective potentiostatic electroextraction of copper, tin and lead from leaching solutions obtained during the recycling of base metals from waste printed circuit boards. Applying this protocol, in a first stage, the concentration of Cu ions from the leaching solutions can be lowered, with acceptable efficiency, below 0.5 g/L. To avoid the contamination of Sn-Pb alloys with Cu, an intermediary step of Cu cementation on metallic Sn were proposed and tested. Finally, the potentiostatic selective electrodeposition protocol was successfully applied for the electroextraction Sn-Pb alloys. The experiments were performed in real leaching samples, using a Fisher type electrode as cathode. The obtained experimental results demonstrate that, controlling rigorously the imposed potential and corelating them with the solution composition, high purity Cu and Sn-Pb alloys deposits can be obtained, maximum contents of 99.96%, 99.83% and 82.62% being evaluated for Cu, Sn and Pb, respectively.

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STUDIA UBB CHEMIA, Volume 66 (LXVI), No. 2, June 2021

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Published

2021-06-30

How to Cite

FRÎNCU, M.-I., COVACI, E., DORNEANU, S.-A., & ILEA, P. (2021). SELECTIVE ELECTROEXTRACTION OF BASE METALS FROM LEACHING SOLUTIONS OBTAINED DURING THE RECYCLING OF WASTE PRINTED CIRCUIT BOARDS. II. SELECTIVE POTENTIOSTATIC ELECTRODEPOSITION OF COPPER, TIN AND LEAD. Studia Universitatis Babeș-Bolyai Chemia, 66(2), 137–149. https://doi.org/10.24193/subbchem.2021.2.12