Photooxidation of carbofuran by a polychromatic UV irradiation without and with hydrogen peroxide
- Univ. de Extremadura, Badajoz (Spain). Dept. de Ingenieria Quimica y Energetica
The photodegradation of carbofuran aqueous solutions has been conducted with direct photolysis provided by a polychromatic UV radiation source and by the combination of this UV radiation with hydrogen peroxide. In both processes, the decomposition level obtained as a function of the operating variables is reported, and the presence of tert-butyl alcohol, a scavenger of free radicals, is discussed. While the contribution of hydroxyl radicals is negligible in the direct photolysis, its reactions in the UV/H{sub 2}O{sub 2} system clearly increase the carbofuran decomposition and therefore must be taken into account in the reaction rate equation for the total degradation. From the mechanisms proposed, the quantum yields for the direct photolysis and the kinetic constants for the reaction between carbofuran and the hydroxyl radicals generated in the H{sub 2}O{sub 2} photolysis in the combined process are respectively evaluated.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 183133
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 34, Issue 11; Other Information: PBD: Nov 1995
- Country of Publication:
- United States
- Language:
- English
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