Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

FP5

CADOX Berichtzusammenfassung

Project ID: EVK1-CT-2002-00122
Gefördert unter: FP5-EESD
Land: Spain

Combination of ozone and photo-fenton for treatment of wastewater containing pesticides

The coupling between Photo-Fenton and ozonation has been used as Advanced Oxidation Proces for the degradation of the following biorecalcitrant pesticides: alachlor, atrazine, chlorfenvinfos, diuron, isoproturon and pentachlorophenol.These organic compounds are considered Priority Hazardous Substances by the Water Framework Directive of the European Comission.Also,Femam (a-methilfenilglicinamide, C9H12N2O, Deretil Co.), T000824 (C11H10Cl2N2O, Janssen Pharmaceutica) and R113675( C17H21NO3, Janssen Pharmaceutica)have been used for testing degradation efficiency.

These organic compounds are considered Priority Hazardous Substances by the Water Framework Directive of the European Comission. The degradation process of the different pesticides, that occurs through oxidation of the organic molecules by means of their reaction with generated OH radical, follows a first-order kinetics. The Photo-Fenton/ozone coupling together with the traditional ozone+UV, have been used to investigate TOC reduction of the different organics aqueous solutions. In all studied cases, the best results of pesticide mineralization are obtained when PhFO is applied.

On the other hand,from biotoxicity experiments, it is concluded that the use of this Photo-Fenton/ozone coupling as Advanced Oxidation Process, the aqueous pesticide solutions become detoxyfied except in the case of atrazine and alachlor aqueous solutions for which no detoxification is achieved at the experimental conditions used in the work, at least after 2 and 3 h of treatment, respectively. With relation to Deretil and Janssen productsDetoxification for atrazine, alachlor and Janssen and Deretil products biodetoxification has not been successful for treatment times lower than about 180 min.

Reported by

AUTONOMOUS UNIVERSITY OF BARCELONA
Campus Universitario, Departament de Química.
08193 BELLATERRA
Spain
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