This study reports the kinetics of copper metal dissolution in citric acid-hydrogen peroxide solution using the rotating disc method. The effect of the concentration of citric acid as well as hydrogen peroxide, stirring speed, disc surface area, and temperature was investigated. The concentration of hydrogen peroxide (0.25–1.5 mol/L) has a strong effect on the dissolution rate (mg/min) of copper with a reaction order of 0.92, compared to a reaction order of 0.42 with respect to the concentration of citric acid (0.125–1.5 mol/L). The reaction rate is directly proportional to the disc area () and square root of the disc rotation speed (), as expected from the Levich equation. The activation energy of 33 kJ/mol, in the temperature range 30-60 °C is also comparable with the values reported in previous studies.

中文翻译：

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转盘法研究金属铜在柠檬酸和过氧化氢中的溶解动力学

本研究报告了使用转盘法铜金属在柠檬酸-过氧化氢溶液中溶解的动力学。研究了柠檬酸和过氧化氢的浓度、搅拌速度、圆盘表面积和温度的影响。过氧化氢浓度 (0.25–1.5 mol/L) 对铜的溶解速率 (mg/min) 有很大影响，反应级数为 0.92，而柠檬酸浓度的反应级数为 0.42 （0.125–1.5 摩尔/升）。正如 Levich 方程所预期的那样，反应速率与圆盘面积 () 和圆盘转速的平方根 () 成正比。在 30-60 °C 的温度范围内，活化能为 33 kJ/mol，也与之前研究中报告的值相当。