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Detection and Determination of the Peroxyl Radical in the Photolysis with TiO2  

Kwon, Bumgeun ((주)해냄테크)
Kim, Jongoh (강릉원주대학교 토목공학과)
Publication Information
Journal of the Korean GEO-environmental Society / v.11, no.7, 2010 , pp. 45-49 More about this Journal
Abstract
We have developed and demonstrated the use of a new kinetic method as an analytical tool for the measurement of $HO_2{\cdot}/O_2{\cdot}^-$. This new method is based on the reduction of $Fe^{3+}$-Ethylene Diamine Tetra Acetate, EDTA) into $Fe^{2+}$-EDTA by $HO_2{\cdot}/O_2{\cdot}^-$ and the well-known Fenton-like reaction of $H_2O_2$ and $Fe^{2+}$-EDTA to yield the hydroxyl radicals ($OH{\cdot}$). Since this method for $HO_2{\cdot}/O_2{\cdot}^-$ shows high sensitivity and allows a simple calibration system, it can contribute significantly to understanding the basic functions of $HO_2{\cdot}/O_2{\cdot}^-$ in advanced oxidation processes for water treatment. Moreover, the present technique has the advantage of using inexpensive and easily available nonenzymatic reagents and of being insensitive to the moderate concentration of possible interferences often found in aqueous phase.
Keywords
Peroxyl radical; Photolysis; Detection; Determination; $TiO_2$;
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