PMID: 15224744Jul 1, 2004Paper

Photochemical decomposition of 15 polybrominated diphenyl ether congeners in methanol/water

Environmental Science & Technology
Johan ErikssonAke Bergman

Abstract

Among all brominated flame retardants in use, the polybrominated diphenyl ethers (PBDEs) have been identified as being of particular environmental concern due to their global distribution and bioaccumulating properties, as observed in humans and wildlife worldwide. Still there is a need for more data on the basic characteristics of PBDEs to better understand and describe their environmental fate. Hence, the aim of this study was to investigate the photochemical degradation of PBDEs with different degrees of bromination. The photochemical degradation of 15 individual PBDEs substituted with 4-10 bromine atoms was studied in methanol/water (8:2) by UV light in the sunlight region. Nine of these were also studied in pure methanol, and four of the nine PBDEs were studied in tetrahydrofuran. The photochemical reaction rate decreased with decreasing number of bromine substituents in the molecule but also in some cases influenced by the PBDE substitution pattern. The reaction rate was dependent on the solvent in such a way that the reaction rate in a methanol/water solution was consistently around 1.7 times lower than in pure methanol and 2-3 times lower than in THF. The UV degradation half-life of decaBDE (T1/2 = 0.5 h) was more than ...Continue Reading

References

May 30, 1969·Science·A R MosierL L Miller
Jul 10, 2003·Environment International·Isao Watanabe, Shin-ichi Sakai

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Citations

Jan 9, 2007·Analytical and Bioanalytical Chemistry·Heather M StapletonStephen A Wise
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