Determination of Cu2+ Ions Concentration by Electrochemical Methods
| Autor: | Senka Gudić, Nikolina Krišto |
|---|---|
| Jazyk: | English<br />Croatian |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Kemija u Industriji, Vol 72, Iss 5-6, Pp 289-295 (2023) |
| Druh dokumentu: | article |
| ISSN: | 0022-9830 1334-9090 |
| DOI: | 10.15255/KUI.2022.061 |
| Popis: | The possibility of determining the concentration of heavy metal ions, i.e., Cu2+ ions in an aqueous solution of CuSO4 ∙ 5H2O, was tested by electrochemical means. For this purpose, polarisation curves were recorded on a Pt electrode in solutions of known (0.1, 0.5, 1.0, 2.5, 5.0, 7.5, 10.0, 50.0, and 100.0 mM) and unknown concentrations of Cu2+ ions with the reading of the limiting diffusion current. Polarisation measurements were performed in the potential range from open circuit potential to −3.0 V with different potential scan rates (1, 5, 10, 20, and 50 mV s–1). By cathodic deposition on the Pt surface, a reddish-brown copper coating was deposited, the thickness of which increased as the concentration of Cu2+ ions in the solution increased. Furthermore, the limiting diffusion current id increased linearly with the increase in Cu2+ ion concentration, c. The id = f(c) plot was constructed and the unknown concentrations of Cu2+ ions in three randomly prepared CuSO4 ∙ 5H2O solutions were determined. Heavy metal ions from polluted waters (Cu2+ ions) can be successfully removed by electrochemical means, and their concentration determined. |
| Databáze: | Directory of Open Access Journals |
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