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Photocatalysed Degradation of Two Selected Herbicide Derivatives in Aqueous Suspensions of Titanium Dioxide

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Abstract:

The photocatalytic degradation of two selected herbicide derivatives, such as 2-(2,4,5-trichlorophenoxy)propionic acid (Fenoprop, 1) and dichloroprop-P (2) has been investigated in aqueous suspensions of titanium dioxide (TiO2) under a variety of conditions, which is essential from application point of view. The reactions were studied by monitoring the change in substrate concentration employing UV spectroscopic analysis technique as a function of irradiation time. The degradation was studied using different parameters such as types of TiO2, reaction pH, catalyst concentration, substrate concentration and in the presence of different electron acceptors such as hydrogen peroxide (H2O2), potassium bromate (KBrO3) and ammonium persulphate (NH4)2S2O8 besides air. The degradation rates were found to be strongly influenced by all the above parameters. The photocatalyst, Degussa P25 was found to be more efficient for the degradation of both the pollutants under investigation.

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/asl.2010.1151

Publication date: December 1, 2010

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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