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Photochemical Transformation of 2,2',4,4'-tetrabromodiphenyl Ether (BDE-47) in Surface Coastal Waters: Effects of Chloride and Ferric Ions

Photochemical Transformation of 2,2',4,4'-tetrabromodiphenyl Ether (BDE-47) in Surface Coastal Waters: Effects of Chloride and Ferric Ions

Qian Zhao, Huimin Zhao, Xie Quan, Shuo Chen, Yaobin Zhang

Mar Pollut Bull. 2014 Sep 15;86(1-2):76-83.

PMID: 25103906

Abstract:

The effects of several aquatic environmental factors on the photochemical transformation of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) have been investigated. Ferric ion (Fe(III)) has been found to promote the phototransformation of BDE-47, and this process is further enhanced with the added chloride ion (Cl(-)), while it is suppressed with increasing pH. Electron spin resonance results show that the formation of hydroxyl radical, and the added Cl(-) could influence the generation of hydroxyl radical in Fe(III) solution. Hence, Cl(-) enhances the phototransformation of BDE-47 most probably because of the reaction with Fe(III) species under irradiation, yielding hydroxyl and chloride radicals. These radicals can not only decompose PBDEs, but also lead to their photodebromination and photochlorination. These results indicate that the aquatic environmental factors and Cl(-) in particular played an important role in the photochemical transformation process of PBDEs, providing insight into the likely fate of PBDEs in the marine environment.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP366791324	BDE No 126 solution		366791-32-4	Price

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