Electrochemical Techniques For Decolouring Aqueous Solutions

Authors

  • I. A. Oke Department of Civil Engineering Obafemi Awolowo University, Ile-Ife, Nigeria
  • J.O. Babatola Department of Civil Engineering Federal University of Technology,Akure, Nigeria
  • K. T. Oladepo Department of Civil Engineering Obafemi Awolowo University,Ile-Ife, Nigeria
  • J. A. Otun Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria
  • D.B. Adie Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria
  • S. Lukman Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria
  • N.O. Olarinoye Department of Chemistry, Adeyemi College of Education, Ondo; Obafemi Awolowo University, Ile-Ife, Nigeria
  • A. Ismail Department of Water Resources and Environmental Engineering Ahmadu Bello University, Zaria, Nigeria

Keywords:

Electrochemical treatment, wastewaters, colour removal, electrolyte, , carbon-resin electrodes, efficacy

Abstract

Usefulness of carbon-resin (CR) as an electrode for colour removal from solutions was investigated in this paper. Carbon-resin electrodes were developed from used and discarded (R20 UM-1) dry cells using a non heat treatment method. Coloured solutions were prepared from standard indicators (methyl blue, methyl orange and solochrome black T). Each of these solutions was subjected to electrochemical treatment in a batch system using aluminium/ CR electrodes. Efficacy of the system based on colour removal was monitored. Kinetics of colour removed from solutions were obtained and evaluated statistically using total error, coefficient of determination (CD) and model of selection criterion (MSC). Effects of separation distance between the electrodes, contact surface area of the electrodes and the presence of an electrolyte on the kinetics were studied and applicability of the system was tested on selected industrial (paint and textile) wastewaters.

                The study revealed that the electrochemical treatment process reduced initial colour of the solutions by 38 %, 36% and 40 % for methyl orange (MO), methyl blue (MB) and solochrome black T (SB) respectively. The presence of an electrolyte (10g/L of NaCl) in the process increased the percentage of the colour removed from the solutions to 84.1; 82.2 and 80.1 for MO, MB and SB, respectively. It was observed that an increase in the contact surface area increased the amount of colour removed while an increase in separation distance between the electrodes decreased the amount of colour removed from the solutions. Statistical evaluation revealed that total error, CD and MSC were in the range of 2.805 to 117.217, 0.130 to 0.983 and -1.834 to 5.964 respectively.

It was concluded that the best kinetic model that predicted removal of colour from textile and paint wastewaters electrochemically should be intraparticle diffusion based on higher CD and MSC values and lower total error.

Author Biographies

I. A. Oke, Department of Civil Engineering Obafemi Awolowo University, Ile-Ife, Nigeria

Department of Civil Engineering
Obafemi Awolowo University, Ile-Ife, Nigeria

J.O. Babatola, Department of Civil Engineering Federal University of Technology,Akure, Nigeria

Department of Civil Engineering
Federal University of Technology,Akure, Nigeria

K. T. Oladepo, Department of Civil Engineering Obafemi Awolowo University,Ile-Ife, Nigeria

Department of Civil Engineering
Obafemi Awolowo University,Ile-Ife, Nigeria

J. A. Otun, Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria

Department of Water Resources and Environmental Engineering,
Ahmadu Bello University, Zaria, Nigeria

D.B. Adie, Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria

Department of Water Resources and Environmental Engineering,
Ahmadu Bello University, Zaria, Nigeria

S. Lukman, Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria

Department of Water Resources and Environmental Engineering,
Ahmadu Bello University, Zaria, Nigeria

N.O. Olarinoye, Department of Chemistry, Adeyemi College of Education, Ondo; Obafemi Awolowo University, Ile-Ife, Nigeria

Department of Chemistry, Adeyemi College of Education, Ondo;
Obafemi Awolowo University, Ile-Ife, Nigeria

A. Ismail, Department of Water Resources and Environmental Engineering Ahmadu Bello University, Zaria, Nigeria

Department of Water Resources and Environmental Engineering
Ahmadu Bello University, Zaria, Nigeria

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Published

2010-01-01

How to Cite

Oke, I. A. ., Babatola, J. ., Oladepo, K. T., Otun, J. A. ., Adie, D., Lukman, S., … Ismail, A. (2010). Electrochemical Techniques For Decolouring Aqueous Solutions. Ife Journal of Technology, 19(1), 15–24. Retrieved from https://ijt.oauife.edu.ng/index.php/ijt/article/view/44