Journal of
Environmental Chemistry and Ecotoxicology

  • Abbreviation: J. Environ. Chem. Ecotoxicol.
  • Language: English
  • ISSN: 2141-226X
  • DOI: 10.5897/JECE
  • Start Year: 2009
  • Published Articles: 195

Full Length Research Paper

Kinetic investigations of oxidation of chlorophenols by permanganate

S. M. Ghausul Hossain
  • S. M. Ghausul Hossain
  • Faculty of Engineering and Information Technology, University of Technology Sydney, P. O. Box 123, NSW 2007, Australia.
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Robert G. McLaughlan
  • Robert G. McLaughlan
  • Faculty of Engineering and Information Technology, University of Technology Sydney, P. O. Box 123, NSW 2007, Australia.
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  •  Accepted: 25 February 2013
  •  Published: 30 April 2013

Abstract

 

The kinetics of oxidation of various chlorophenols such as 2-chlorophenol (2-CP), 3-chlorophenol (3-CP), 4-chlorophenol (4-CP), 2,4-dichlorophenol (2,4-DCP), 2,6-dichlorophenol (2,6-DCP) and 2,4,6-trichlorophenol (2,4,6-TCP) by potassium permanganate (0.8-3.2 mM) were studied in un-buffered solution with ionic strength ~0.02 M. Experimental results was indicated that the reaction of CPs with permanganate was of second-order overall (0.86 to 19.0 M-1s-1) and the reaction is first-order individually with respect to both permanganate and all chlorophenols (CPs) at an initial pH ~7.0 and 22°C. The degradation rate of chlorophenols can be accelerated by increasing oxidant concentration. The reaction rates of 4-CP with permanganate did not show any significant change over pH 5.5 to 8.5 and ionic strength ~0 to 0.2 M. The determined rate constants allowed us to predict the reaction rates of CPs with KMnO4 during oxidative treatment of CPs at contaminated sites.

 

Key words: Chlorophenols, kinetics, oxidation, potassium permanganate, rate constant.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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