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Research Article

Hydrometallurgical leaching and Kinetic modeling of low grade manganese ore with banana peel in sulfuric acid

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  • Received: 17 January 2020Revised: 8 April 2020Accepted: 13 April 2020Available online: 16 April 2020
  • In the present study, manganese (Mn) has been leached out from a low-grade manganese ore (LGMO) using banana peel as a reductant in a dilute sulfuric acid (H2SO4) medium. The effects of banana peel amount, H2SO4 concentration, reaction temperature and time on Mn leaching from the complex LGMO were studied. The leaching efficiency of ~98% was achieved at 2h leaching time, 4 g banana peel amount, 120oC leaching temperature, 5 g manganese ore amount and 15 vol.% sulfuric acid concentration. The phase, microstructural and chemical analyses of LGMO samples before and after leaching confirmed that a high Mn content (~18 wt.%) has been successfully leached out. Furthermore, the leaching process follows the shrinking core model (SCM) and the leaching rate was controlled by the surface chemical reaction (1 - (1-x)1/3 = kt ) mechanism with an apparent activation energy (Ea) of 40.19 kJ.mol-1.
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Hydrometallurgical leaching and Kinetic modeling of low grade manganese ore with banana peel in sulfuric acid

  • Corresponding authors:

    Sajjad Ali    E-mail: sajjad2485@yahoo.com

    Khizar Hussain Shah    E-mail: khizarshah@cuiatd.edu.pk

  • 1. Materials Research Laboratory, Department of Physics, University of Peshawar, 25120 Peshawar, Pakistan
  • 2. Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road 22060 Abbottabad, Pakistan
  • 3. Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, University Road 22060 Abbottabad, Pakistan

Abstract: In the present study, manganese (Mn) has been leached out from a low-grade manganese ore (LGMO) using banana peel as a reductant in a dilute sulfuric acid (H2SO4) medium. The effects of banana peel amount, H2SO4 concentration, reaction temperature and time on Mn leaching from the complex LGMO were studied. The leaching efficiency of ~98% was achieved at 2h leaching time, 4 g banana peel amount, 120oC leaching temperature, 5 g manganese ore amount and 15 vol.% sulfuric acid concentration. The phase, microstructural and chemical analyses of LGMO samples before and after leaching confirmed that a high Mn content (~18 wt.%) has been successfully leached out. Furthermore, the leaching process follows the shrinking core model (SCM) and the leaching rate was controlled by the surface chemical reaction (1 - (1-x)1/3 = kt ) mechanism with an apparent activation energy (Ea) of 40.19 kJ.mol-1.

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