Browsing by Author "Ali, B."

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Eco-Friendly Leaching of Metallic Silver With Boric Acid: Kinetics Study
(Chemical Society of Ethiopia, 2025) Boyrazlı, M.; Abdelraheem, M.T.O.; Aydoǧan, S.; Ali, B.; Mammadov, K.
This article discusses the kinetics of using a hydrogen peroxide solution to dissolve pure metallic silver in boric acid. The impact of temperature, rotation speed, hydrogen peroxide (H2O2) concentration, and boric acid concentration were investigated. The results indicate that silver dissolution rate and rotation speed have a positive relationship. Additionally, boric acid concentrations ranging from 0.10 to 0.40 M significantly enhance the dissolution process. The hydrogen peroxide concentration has no discernible influence on the rate of dissolution. While temperatures between 20 and 40 °C are beneficial, temperatures above 40 °C had the opposite effect and caused a layer of boron oxide (B2O3) to form. The activation energy was determined to be 30.49 kJ/mol. © 2025 Chemical Society of Ethiopia and The Authors.
Citation - WoS: 2
Citation - Scopus: 1
Leaching Kinetics of Metallic Silver With Sodium Cyanide in Hydrogen Peroxide Solution
(John Wiley and Sons Inc, 2025) Aydogan, S.; Abdelraheem, M.T.O.; Ali, B.; Boyrazli, M.
This article describes the kinetics of dissolving pure metallic silver (Ag) in sodium cyanide with a hydrogen peroxide (H2O2) solution. The impacts of temperature, sodium cyanide concentration, rotation speed, and H2O2 concentration were investigated. The findings demonstrate that a favourable relationship exists between the rate of silver dissolution and the rotation speed. Moreover, sodium cyanide concentration of 0.0125 M was sufficient to dissolve silver. Hydrogen peroxide concentrations between 0.05 and 0.035 M have a significant impact on the dissolution rate; however, 0.050 M concentration had an adverse effect and resulted in the formation of a silver oxide layer. Temperatures between 20 and 55°C have a positive influence because this range is where H2O2 is stable, but a temperature of 60°C decreased the silver dissolution rate due to decomposition of hydrogen peroxide. A measurement of 21.50 kJ/mol was calculated of the activation energy. © 2025 Canadian Society for Chemical Engineering.
Citation - WoS: 5
Citation - Scopus: 5
Rotating Disc Method To Study the Dissolution Kinetics of Copper Metal in Citric Acid and Hydrogen Peroxide
(Elsevier B.V., 2024) Motasim, M.; Aydoğan, S.; Ali, B.; Agacayak, T.
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 (A) and square root of the disc rotation speed (ω1/2), 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. © 2024 Elsevier B.V.