Photodegradation of brominated flame retardants in polystyrene: Quantum yields, products and influencing factors

Chemosphere
Amina KhaledMohamad Sleiman

Abstract

Brominated flame retardants (BFRs) are widely used as additives in plastics, textiles and electronics materials. Here, we investigated the photodegradation of four BFRs including decabromobiphenylether (BDE-209), tetrabromobipsphenol A (TBBPA), tetrabromobisphenol A-bis(2,3-dibromopropylether) (TBBPA-DBPE) and tetrabromobisphenol A bis (allyl) ether (TBBPA-BAE). Experiments were carried out in polystyrene (PS) films using monochromatic and polychromatic irradiations. For comparison, irradiations were also carried in a solvent (tetrahydrofuran: THF). Monitoring of BFR degradation was performed using bulk and surface infrared (IR) measurements, as well as by extraction and HPLC-UV. Photoproducts were characterized using HPLC-high resolution electrospray ionization mass spectrometry (HPLC-ESI-Orbitrap-MS). All four BFRs underwent photochemical transformation in THF at 290 nm with a quantum yield (Φ) ranging from 0.05 for TBBPA to 0.27 for BDE-209, indicating an increase of photoreactivity with the number of Br atoms in BFRs. On the other hand, no major difference in the Φ values was observed when BFRs were embedded in PS films (Φ: 0.82-0.89). The higher photoreactivity in PS appears to be associated with a fast oxidation of PS as ...Continue Reading

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Citations

Mar 20, 2021·The Science of the Total Environment·Peng LiuShixiang Gao
Dec 11, 2020·Chemosphere·Dong XiaJean-Christophe P Gabriel
Nov 5, 2019·Environmental Science & Technology·Ping XiongGuibin Jiang
Mar 5, 2019·Environmental Science & Technology·Peng LiuShixiang Gao
Sep 4, 2021·Environmental Pollution·Haozheng HeShanquan Wang
Oct 1, 2021·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Nobuyasu HanariJerzy Falandysz
Feb 18, 2020·Ecotoxicology and Environmental Safety·Anam SaeedBogdan Z Dlugogorski

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