Journal of Chemical Engineering and Materials Science
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Article Number - B02AD0A40108


Vol.4(6), pp. 80-86 , September 2013
DOI: 10.5897/JCEMS2013.0165
ISSN: 2141-6605



Full Length Research Paper

BOD5 removal from tannery wastewater over ZnO-ZnFe2O4 composite photocatalyst supported on activated carbon



H. A. Mohammed
  • H. A. Mohammed
  • Department of Chemical Engineering, Ahmadu Bello University, Zaria, Kaduna State, Nigeria.
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A. Hamza
  • A. Hamza
  • Department of Chemical Engineering, Ahmadu Bello University, Zaria, Kaduna State, Nigeria.
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I. K. Adamu
  • I. K. Adamu
  • Nigerian Institute of Leather and Science Technology, Zaria, Kaduna State, Nigeria.
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A. Ejila
  • A. Ejila
  • Nigerian Institute of Leather and Science Technology, Zaria, Kaduna State, Nigeria.
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S. M. Waziri
  • S. M. Waziri
  • Department of Chemical Engineering, Ahmadu Bello University, Zaria, Kaduna State, Nigeria.
  • Google Scholar
S. I. Mustapha
  • S. I. Mustapha
  • Department of Chemical Engineering, Ahmadu Bello University, Zaria, Kaduna State, Nigeria.
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 Accepted: 28 August 2013  Published: 30 September 2013

Copyright © 2013 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


Tannery wastewater with high biological oxygen demand (BOD5) was treated with ZnO-ZnFe2O4composite photocatalyst supported on activated carbon under visible light irradiation. Only 9% of BOD5 in the raw effluent were removed via adsorption on the surface of the photocatalyst in the dark for two hours. Photocatalysis with ZnO-ZnFe2O4 composite photocatalyst on activated carbon support removed 90% of BODin two hours. For all the photocatalysis, complete BOD5removal of the wastewater sample could not be achieved. The photocatalytic effiency was found to increase with increase in the power of the light sources employed. The kinetics of decrease of the value of BOD5 fitted to the pseudo first order kinetic model (R2 = 0.9601). The derived value of the apparent rate constant for the photocatalytic decrease of the value of BOD5 was 0.049 min-1.

 

Key words: Photocatalyst, BOD5, ZnO-ZnFe2O4, tannery, wastewater.

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APA (2013). BOD5 removal from tannery wastewater over ZnO-ZnFe2O4 composite photocatalyst supported on activated carbon. Journal of Chemical Engineering and Materials Science, 4(6), 80-86 .
Chicago H. A. Mohammed, A. Hamza, I. K. Adamu, A. Ejila, S. M. Waziri and S. I. Mustapha      . "BOD5 removal from tannery wastewater over ZnO-ZnFe2O4 composite photocatalyst supported on activated carbon." Journal of Chemical Engineering and Materials Science 4, no. 6 (2013): 80-86 .
MLA H. A. Mohammed, et al. "BOD5 removal from tannery wastewater over ZnO-ZnFe2O4 composite photocatalyst supported on activated carbon." Journal of Chemical Engineering and Materials Science 4.6 (2013): 80-86 .
   
DOI 10.5897/JCEMS2013.0165
URL http://academicjournals.org/journal/JCEMS/article-abstract/B02AD0A40108

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