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Barcellos da Rosa, Marcelo ; Krüger, Heinz-Ulrich ; Thomas, Sebastian ; Zetzsch, Cornelius:
Photolytic debromination and degradation of decabromodiphenyl ether, an exploratory kinetic study in toluene.
In: Fresenius Environmental Bulletin.
Bd. 12
(2003)
Heft 8
.
- S. 940-945.
ISSN 1018-4619
Abstract
The photolysis of decabromodiphenyl ether, dissolved in toluene, was studied using a filtered Xe lamp as solar simulator. A loss of decabromodiphenyl ether, leading to unknown products, and sequential debromination via the nona-, octa-, heptabromodiphenyl ethers was obsd. The photolytic rate const. of decabromodiphenyl ether, kphot = 3 X 10-4 s-1, indicated a high quantum yield > 0.1, of which more than 50% leads to debromination. The debromination rate consts. decreased with the debromination steps, and the decrease can be explained by the decreasing overlap of the UV absorption spectra of the compds. with the spectrum of the lamp, where the decrease can be expected to be similar for sunlight. The UV absorption spectra of diphenylether, 4-bromodiphenyl ether, 4,4'-dibromodiphenyl ether and decabromodiphenyl ether, dissolved in toluene, are presented for the first time. The spectra in the wavelength range from 290 to 360 nm imply a strong diurnal, seasonal and latitudinal dependence of environmental photolysis rates.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER26052 |
| Institutionen der Universität: | Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 12 Nov 2015 07:43 |
| Letzte Änderung: | 12 Nov 2015 07:43 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/22227 |