Publication: A novel cu-sio2 nano-catalyst electrode for the treatment of chloride ion from Eshidiya mine wastewater, Jordan
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Date
2023-12-01
Authors
Mohammad Salem Abdullah Alhwaiti
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Abstract
This study aims to develop new technology concepts using Cu-SiO2 nanocatalyst electrodes for treating industrial mine wastewater by reducing chlorine ions present in the wastewater discharged from the Eshidiya mine in South Jordan. A developed Cu-SiO2 nano-catalysts were developed to reduce the Cl– concentration in Eshidiya mine wastewater. Copper sulfate and Tetraethoxysilicate (TEOS) form a sol-gel, dried, and calcined to form Cu-SiO2; subsequently, a blend of copper-silica and dry graphite powders was coated onto a Cu wire, creating a Cu-SiO2 nano-catalyst electrode. Electrochemical mechanisms, reaction kinetics, electrode regeneration, and efficiency of the electrode were evaluated. The optimal condition for Cu-SiO2 nano-catalyst electrodes entailed examining their impact on chloride removal efficiency through the investigation of variable scan rates, initial chloride concentrations, pH concentrations, current density, and electrode sensitivity. The Brunauer-Emmet-Teller (BET) results revealed that the surface area and pore volume of the Cu-SiO2 were 470.7309 cm2/g and 0.296093 cm3/g, respectively. The Cyclic Voltammetry (CV) results indicated that the chloride ion at a scan rate of 5.0 V/s reduced the anodic peak potential by 0.11 V and decreased the current density to 5.8 mA/cm². The Tafel Plot shows three significant peak potentials at -0.005, 0.052, and 0.104 V. The i-t curve showed that the electrode reached an equilibrium activity that required regeneration to be activated by reversing the voltage from 0.71 volts to 0.71 volts.