SENSORS ARRAY FOR MONITORING AND AUTOMATION OF THE ELECTROCHEMICAL RECOVERY OF METALS FROM WASTE PRINTED CIRCUIT BOARDS

Sorin-Aurel  DORNEANU; Eniko  COVACI; Florica  IMRE-LUCACI; Graziella Liana  TURDEAN

doi:10.24193/subbchem.2019.2.48

SENSORS ARRAY FOR MONITORING AND AUTOMATION OF THE ELECTROCHEMICAL RECOVERY OF METALS FROM WASTE PRINTED CIRCUIT BOARDS

Authors

Sorin-Aurel DORNEANU Faculty of Chemistry and Chemical Engineering; Interdisciplinary Research Institute on Bio Nano Sciences; Research Center of Electrochemistry and Nonconventional Materials, “Babes-Bolyai” University, Cluj-Napoca, Romania. Email: dorneanu@chem.ubbcluj.ro. https://orcid.org/0000-0002-2690-6383
Eniko COVACI Faculty of Chemistry and Chemical Engineering, “Babes-Bolyai” University, Cluj-Napoca, Romania. Email: kkeenniikkoo@yahoo.com. https://orcid.org/0000-0002-8453-9155
Florica IMRE-LUCACI Interdisciplinary Research Institute on Bio Nano Sciences, “Babes-Bolyai” University, Cluj-Napoca, Romania. Email: florica.imre@ubbcluj.ro. https://orcid.org/0000-0003-2943-7946
Graziella Liana TURDEAN Research Center of Electrochemistry and Nonconventional Materials, “Babes-Bolyai” University, Cluj-Napoca, Romania. Email: gturdean@chem.ubbcluj.ro. https://orcid.org/0000-0003-1273-6878

DOI:

https://doi.org/10.24193/subbchem.2019.2.48

Keywords:

waste printed circuit boards, metals recovery, sensor array, potentiometric and voltammetric sensors

Abstract

Nowadays there is increasing interest in using various electrochemical methods as alternative to the energy consuming physico-mechanical, hydrometallurgical and pyrometallurgical techniques for metals recovery from waste printed circuit boards (WPCBs). Thus, cyclic voltammetry (CV) and cyclic square-wave voltammetry (CSWV) methods were used for studying the electrochemistry of some metals (Cu, Sn, Pb, Fe, Zn) on glassy carbon electrode from synthetic leaching solutions containing known concentrations of metallic ions and in real solution obtained from dissolving 10 WPCBs. A good linear correlation was obtained between the parameters evaluated by ICP-OES and cyclic voltammetry. The influence of pH and oxidation/reduction potential (ORP) on the corrosion rate of the mentioned metals was studied gravimetrically. Based on the obtained results, a complex sensors array (amperometric, pH, temperature and ORP) was proposed to assure the accurate monitoring and control of the electrochemical process for metals recovery from WPCBs.

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Published

2019-06-28

How to Cite

DORNEANU, S.-A. ., COVACI, E. ., IMRE-LUCACI, F. ., & TURDEAN, G. L. . (2019). SENSORS ARRAY FOR MONITORING AND AUTOMATION OF THE ELECTROCHEMICAL RECOVERY OF METALS FROM WASTE PRINTED CIRCUIT BOARDS. Studia Universitatis Babeș-Bolyai Chemia, 64(2), 555–565. https://doi.org/10.24193/subbchem.2019.2.48