Catalytic Agent Degradation on Oxide Films and in Microheterogeneous Solution Systems
Interim rept. no. 4,
ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND)
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The investigation over the last six month period concerns the mineralization of organophosphonates in aqueous solutions in the presence of Fe III peroxides. A striking enhancement by visible light of the peroxidase activity of the reactive intermediate formed under these conditions is reported. Experiments centered principally on the degradation of the compound diethyl- benzylphosponate. Experiments employed 20 ml aqueous solutions of 5x10-3 M diethylbenzylphosponate contained in 130 ml glass vials closed with a septum and immersed in a thermostated water bath. The time course of the mineralization of the phosphonate was followed by withdrawal of samples of liquid and gas and analyzing the total organic carbon TOC and CO2 content, respectively. The TOC analysis was carried out with a Shimatsu instrument, while carbon dioxide was analyzed by gas chromatography using a Poropack column and helium as the carrier gas.
- Organic Chemistry
- Physical Chemistry