PHOTOSENSITIZED OXIDATIVE-DEGRADATION OF PESTICIDES

Citation
A. Galadi et M. Julliard, PHOTOSENSITIZED OXIDATIVE-DEGRADATION OF PESTICIDES, Chemosphere, 33(1), 1996, pp. 1-15
Citations number
63
Categorie Soggetti
Environmental Sciences
Journal title
ISSN journal
00456535
Volume
33
Issue
1
Year of publication
1996
Pages
1 - 15
Database
ISI
SICI code
0045-6535(1996)33:1<1:POOP>2.0.ZU;2-3
Abstract
The photosensitized oxidative degradation of the three pesticides : 1, 1-dichloro 2,2-bis (4-ethylphenyl)ethane ''perthan'', 3,5-dimethyl-4-m ethylthiophenyl-N-methylcarbamate ''mercaptodimetur'' and 2((ethylthio )methyl)phenyl-N-methylcarbamate ''ethiofencarb'' was studied in aceto nitrile/water mixture as a solvent with anthraquinone as a photosensit izer. The photoproducts obtained and the reduction potential of the ph otoexcited sensitizer are in agreement with a primary mechanism involv ing an electron-transfer from the pesticide to the excited photosensit izer. These results show that an electron-acceptor photosensitizer may increase the rate of photodegradation and help to completely remove t he pollutant.