Electrosorption of Hexavalent Chromium Ions by MnO2/Carbon Fiber Composite Electrode: Analysis and Optimization of the Process by Box-Behnken Design

Authors

  • Zainab M. Issa Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq
  • Rasha H. Salman Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq
  • Prashant Basavaraj Bhagawati College of Engineering and Technology, Ashta, Maharashtra, India

DOI:

https://doi.org/10.31699/IJCPE.2023.1.7

Keywords:

electrosorption process, hexavalent chromium ions, composite electrode, electrodeposition, nanostructured MnO2, Box-Behnken design.

Abstract

A nano manganese dioxide (MnO2) was electrodeposited galvanostatically onto a carbon fiber (CF) surface using the simple method of anodic electrodeposition. The composite electrode was characterized by field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD). Very few studies investigated the efficiency of this electrode for heavy metals removal, especially chromium. The electrosorption properties of the nano MnO2/CF electrode were examined by removing Cr(VI) ions from aqueous solutions. NaCl concentration, pH, and cell voltage were studied and optimized using the Box-Behnken design (BDD) to investigate their effects and interactions on the electrosorption process. The results showed that the optimal conditions for the removal of Cr(VI) ions were a cell voltage of 4.6 V, pH of 2 and NaCl concentration of 1.5 g/L. This work indicated that MnO2/CF electrode was highly effective in removing Cr(VI) ions and the BBD approach was a feasible and functional method for evaluating the experimental data.

Received on 13/12/2022

Received in Revised Form on 24/01/2023

Accepted on 25/01/2023

Published on 30/03/2023

Author Biographies

  • Zainab M. Issa, Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

     

     

  • Rasha H. Salman, Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

     

     

  • Prashant Basavaraj Bhagawati, College of Engineering and Technology, Ashta, Maharashtra, India

     

     

     

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2023-03-30

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Vol. 24 No. 1 (2023): Iraqi Journal of Chemical and Petroleum Engineering

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How to Cite

M. Issa, Z., H. Salman, R., & Basavaraj Bhagawati, P. (2023). Electrosorption of Hexavalent Chromium Ions by MnO2/Carbon Fiber Composite Electrode: Analysis and Optimization of the Process by Box-Behnken Design. Iraqi Journal of Chemical and Petroleum Engineering, 24(1), 51-63. https://doi.org/10.31699/IJCPE.2023.1.7

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