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Dissolution of Metals in Di fferent Bromide-Based Systems: Electrochemical Measurements and Spectroscopic Investigations

Simona Varvara, Sorin-Aurel Dorneanu

2020enmetalsbromidedissolutionelectrochemicalspectroscopy

Abstract

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The dissolution of the main metals (Cu, Zn, Sn, Pb and Fe) found in waste printed circuit boards (WPCBs) was investigated by electrochemical corrosion measurements (potentiodynamic polarization and electrochemical impedance spectroscopy (EIS)) in different bromide-based systems that could be used as lixiviants in hydrometallurgical route of metals recovery. The analysis of the corrosion products was carried out by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements. All measurements showed that the addition of bromine in the electrolyte favors to great extents the dissolution process of all studied metals as compared to bromine-free electrolytes. In the investigated experimental conditions, the highest dissolution rates of the metals were obtained in acidic KBr solution containing 0.01 mol /L bromine and they decreased in the following order: Zn >> Sn > Pb > Fe >Cu. The XRD and XPS chemical assessment allowed the identification of the dissolution products formed on the metallic surfaces after exposure to the electrolytic conditions.

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Cite This Work

@article{b4b02be5-f6df-4bb4-b3f8-1cee6280d589,
  title={Dissolution of Metals in Di fferent Bromide-Based Systems: Electrochemical Measurements and Spectroscopic Investigations},
  author={Simona Varvara and Sorin-Aurel Dorneanu},
  year={2020},
  language={en}
}
TY  - JOUR
TI  - Dissolution of Metals in Di fferent Bromide-Based Systems: Electrochemical Measurements and Spectroscopic Investigations
AU  - Simona Varvara
AU  - Sorin-Aurel Dorneanu
PY  - 2020
LA  - en
ER  -

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