Anandhakumar, S. and Chandrasekaran, M. and Noel, M. (2010) Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification. Journal of Applied Electrochemistry, 40. pp. 303-310. ISSN 0021-891X

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Abstract

The voltammetric behavior of 2, 4-dichlorophenol (DCP), 2, 4, 6-trichlorophenol (TCP) and pentachlorophenol (PCP) in aqueous sodium hydroxide (NaOH), aqueous NaOH–sodium dodecylsulphate (SDS) micellar solution and SDS/n-hexane/n-butanol/water microemulsion on glassy carbon electrode (GC) is reported. In aqueous alkaline medium, the electrode fouling is significant. Among the three media, the electrode fouling is the minimum in aqueous microemulsion. The fouling effect also depends on the nature of the phenolic compound. DCP exhibits the maximum fouling effect, and PCP exhibits the minimum fouling effect. During oxidation of the TCP in the microemulsion, quinone–hydroquinone-like redox couples were formed on the electrode surface. Reproducible voltammetric responses without electrode fouling could be obtained for all the three phenolic compounds up to 20 mM concentrations in microemulsion. In the galvanostatic oxidation in NaOH media, DCP and TCP led to formation of polymeric films on the glassy carbon surface. The Average molecular weight of the polymer obtained is in the range of 7,500–9,500. Even 2.5% by weight of chlorophenols could be oxidized under galvanostatic conditions in microemulsions without significant fouling.

Item Type:	Article
Uncontrolled Keywords:	Chlorophenols; Electroanalysis; Electrochemical detoxification; Glassy carbon electrode; Micelles; Microemulsion
Subjects:	Electroorganic
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	18 Jan 2012 11:29
Last Modified:	18 Jan 2012 11:29
URI:	http://cecri.csircentral.net/id/eprint/273

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