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Aquatic Photolysis of Hydroxylated Polybromodiphenyl Ethers Under Direct UV Irradiation: A Case Study of 2'-HO-BDE-68

Aquatic Photolysis of Hydroxylated Polybromodiphenyl Ethers Under Direct UV Irradiation: A Case Study of 2'-HO-BDE-68

Bentuo Xu, Minghong Wu, Chenyuan Pan, Yan Sun, Debao Yuan, Liang Tang, Gang Xu

Environ Sci Pollut Res Int. 2017 Jun;24(16):14409-14416.

PMID: 28432629

Abstract:

Hydroxylated polyhalodiphenyl ethers (HO-PXDEs) have attracted considerable scientific interest as examples of emerging aquatic pollutants. However, a comprehensive assessment of disposal methods for this particular pollutant was seldom investigated. This study examined the UV light degradation of HO-PXDEs, using 2'-HO-2, 3', 4, 5'-tetrabromodiphenyl ether (2'-HO-BDE-68) as a case study. The results showed that UV light was superior to visible light and electron beam irradiation for producing a high degradation rate of 2'-HO-BDE-68. At low concentrations of HO-BDE, the degradation rate was not obviously improved with decreasing initial concentration. The degradation efficiency was also found to be better in alkaline solutions. In a UV/H2O2 system, the hydroxyl radical provided by H2O2 was shown to enhance the degradation efficiency. The main photolysis products of 2'-HO-BDE-68 were identified, and the possible photodegradation pathways were proposed. 1, 3, 8-Tribromodibenzo-p-dioxin was one of the photoproducts, which indicates that secondary pollution must also be considered with the UV photolysis process.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP182677301	BDE No 138 solution		182677-30-1	Price

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