| Download | - View final version: Electrochemical kinetics study of ultrasound-assisted chalcopyrite oxidation (PDF, 2.4 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1007/s40831-023-00672-7 |
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| Author | Search for: Li, Lin1ORCID identifier: https://orcid.org/0000-0002-9109-6233; Search for: King, Aaron1; Search for: Davis, Krystal1; Search for: Yu, Ben1 |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Subject | chalcopyrite; ultrasound; linear sweep voltammetry; tafel kinetics; chronoamperometry; leaching |
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| Abstract | Ultrasound-assisted chalcopyrite leaching has been reported previously, showing a noticeable improvement in leaching kinetics. However, the efect of ultrasound on the chalcopyrite oxidation kinetics from an electrochemical perspective has not been addressed. This study examines the ultrasonic enhancement of chalcopyrite oxidation kinetics in sulfuric acid solution from both conventional leaching and electrochemistry aspects. Electrochemical techniques, including linear sweep voltammetry (LSV) and chronoamperometry (CA), were used to illustrate the kinetics of chalcopyrite ultrasound-assisted leaching. Tafel analysis by LSV showed that 20% amplitude ultrasound power had increased the chalcopyrite electrochemical dissolution rate by about 20% in both Fe³⁺-free and 10 mM Fe³⁺-containing 0.5 M sulfuric acid solution. The CA tests indicated a drastic increase in the Fe³⁺ reduction reaction when ultrasound was applied (20% amplitude). At 0.5 V, the Fe³⁺ to Fe²⁺ reduction current density at 30 min drastically increased from−65.54 without ultrasound to−1165.84 µA cm⁻² with ultrasound. |
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| Publication date | 2023-04-03 |
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| Publisher | Springer |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 4ac10d08-aa30-42d6-a847-280e53693489 |
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| Record created | 2023-08-08 |
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| Record modified | 2023-08-08 |
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