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Lenoir, D. ; Schramm, K.-W. ; Hutzinger, O. ; Schedel, G.

Photochemical Degradation of Brominated Dibeno-p-dioxins and -Furans in Organic Solvents.

Chemosphere 22, 821-834 (1991)
DOI
Open Access Gold as soon as Publ. Version/Full Text is submitted to ZB.
The photolytic behavior of halogenated dibenzo-p-dioxins and -furans in the organic solvents methanol and n-hexane was investigated and the corresponding quantum-yields and first order decay rates are reported. The photolysis constants in n-hexane increase with increasing number of bromine atoms in the dibenzo-p-dioxin or dibenzofuran skeleton, e.g. from 4.5×10−4 s−1 for the monobrominated to 7.7×10−3 s−1 for the octabrominated dioxin, and from 4.0×10−3 s−1 for the dibrominated to 8.3×10−2 s−1 for the heptabrominated furan. Photolysis in methanol is nearly six times slower than in n-hexane. The bromine compounds react an order of magnitude faster than the chlorine analogues. The results were used to extrapolate the photochemical fate to lipohilic environmental surfaces.
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Publication type Article: Journal article
Document type Scientific Article
ISSN (print) / ISBN 0045-6535
e-ISSN 1879-1298
Journal Chemosphere
Quellenangaben Volume: 22, Issue: 9-10, Pages: 821-834 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place Kidlington, Oxford
Reviewing status Peer reviewed
Institute(s) Institute of Ecological Chemistry (IOEC)