Dissolution Kinetics of Metallic Silver using Ammonium Nitrate and Hydrogen Peroxide Solution as an Environmentally Friendly Cyanide Substitute

Aydogan, Salih; Abdelraheem, Mohamed Taha Osman; Alkloosi, Babiker; Boyrazli, Mustafa

doi:10.22044/jme.2025.16031.3089

Document Type : Original Research Paper

Authors

¹ Department of Mining Engineering, Faculty of Engineering and Natural Sciences, Konya Technical University, Konya, Turkey

² Department of Mining Engineering, Faculty of Engineering Sciences, Omdurman Islamic University, Omdurman, Sudan

³ Department of Economic Geology and Mining, Red Sea University, Port Sudan, Sudan

⁴ Department of Metallurgical and Materials Engineering, Faculty of Engineering, Firat University, Elazig Turkey

https://doi.org/10.22044/jme.2025.16031.3089

Abstract

This article describes the kinetics of utilizing ammonium nitrate to dissolve pure metallic silver in hydrogen peroxide solution (H₂O₂). Using pure metallic silver allows for precise leaching kinetics research by removing interference from impurities and facilitating accurate interpretation of rate-controlling mechanisms. The impact of temperature, rotation speed, H₂O₂ concentration, and ammonium nitrate concentration were all examined. The results show a favorable relationship between the rate of silver (Ag) dissolution and the rotation speed. Additionally, a low concentration of ammonium nitrate (between 0.003 and 0.20 M) has advantageous effects on Ag dissolution. The dissolution rate was significantly impacted by H₂O₂concentrations between 0.08 and 0.15 M, because this range of H₂O₂ concentration required to provide sufficient oxidative potential for significant silver solubility. However, this effect is less pronounced in the 0.20–0.50 M range. 20 - 50 °C range of temperatures are advantageous since H₂O₂is stable in this range. It was calculated that the activation energy was 25.66 kJ/mol.

Keywords

Main Subjects

Mineral Processing

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Journal of Mining and Environment

Dissolution Kinetics of Metallic Silver using Ammonium Nitrate and Hydrogen Peroxide Solution as an Environmentally Friendly Cyanide Substitute

References

References

Volume 17, Issue 1
January and February 2026
Pages 77-87

Dissolution Kinetics of Metallic Silver using Ammonium Nitrate and Hydrogen Peroxide Solution as an Environmentally Friendly Cyanide Substitute

References

References

Volume 17, Issue 1January and February 2026Pages 77-87

Volume 17, Issue 1
January and February 2026
Pages 77-87