Hydrometallurgical leaching and kinetic modeling of low-grade manganese ore with banana peel in sulfuric acid
来源期刊：International Journal of Minerals Metallurgy and Materials2021年第2期
论文作者：Sajjad Ali Yaseen Iqbal Inamullah Khan Ansar Ullah Muhammad Sadiq Muhammad Fahad Khizar Hussain Shah
文章页码：193 - 200
摘 要：Manganese was leached from a low-grade manganese ore（LGMO） using banana peel as the reductant in a dilute sulfuric acid medium. The effects of banana peel amount, H2SO4 concentration, reaction temperature, and time on Mn leaching from the complex LGMO were studied. A leaching efficiency of ～98% was achieved at a leaching time of 2 h, banana peel amount of 4 g, leaching temperature of 120°C,manganese ore amount of 5 g, and sulfuric acid concentration of 15 vol%. The phase, microstructural, and chemical analyses of LGMO samples before and after the leaching process confirmed the successful leaching of manganese. Furthermore, the leaching process followed the shrinking core model and the leaching rate was controlled by a surface chemical reaction(1-（1-x）1/3=kt) mechanism with an apparent activation energy of 40.19 k J·mol-1.
Sajjad Ali1，Yaseen Iqbal1，Inamullah Khan1，Ansar Ullah1，Muhammad Sadiq1，Muhammad Fahad2，Khizar Hussain Shah3
1. Materials Research Laboratory, Department of Physics, University of Peshawar2. Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus3. Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus
摘 要：Manganese was leached from a low-grade manganese ore（LGMO） using banana peel as the reductant in a dilute sulfuric acid medium. The effects of banana peel amount, H2SO4 concentration, reaction temperature, and time on Mn leaching from the complex LGMO were studied. A leaching efficiency of ～98% was achieved at a leaching time of 2 h, banana peel amount of 4 g, leaching temperature of 120°C,manganese ore amount of 5 g, and sulfuric acid concentration of 15 vol%. The phase, microstructural, and chemical analyses of LGMO samples before and after the leaching process confirmed the successful leaching of manganese. Furthermore, the leaching process followed the shrinking core model and the leaching rate was controlled by a surface chemical reaction(1-（1-x）1/3=kt) mechanism with an apparent activation energy of 40.19 k J·mol-1.
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