Ozone facilitated dechlorination of 2-chloroethanol and impact of organic solvents and activated charcoal |
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| Authors: | Asogan N Gounden Sreekanth B Jonnalagadda |
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| Institution: | 1. Department of Chemistry, Mangosuthu University of Technology, P.O. Box 12363, Jacobs, 4026, South Africa
2. School of Chemistry, University of KwaZulu-Natal, Westville campus, Chiltern Hills, P. Bag X54001, Durban, 4000, South Africa
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| Abstract: | The ozone-initiated oxidation of 2-chloroethanol was followed by monitoring the consumption of the halogenated organic substrate. Gas chromatographic analysis of the ozonated products showed an increase in conversion from about 1 % after 3 h of ozone treatment to about 22 % after 12 h. The yields of major ozonated products identified and quantified namely acetaldehyde, acetic acid, and chloride ion increased proportionately as a function of ozone treatment time. The percent conversion of 2-chloroethanol in the presence of acetic acid or ethyl acetate were found to be higher than those under solvent-free conditions with similar products obtained. The use of activated charcoal during the ozonolyis of 2-chloroethanol showed a significant increase in the percent conversion of the substrate compared to solvent free ozonation. Based on the experimental findings, the overall mechanism for the reaction between 2-chloroethanol and ozone is described. |
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