- Title
- Oxidation of 4-bromo-4'-chlorobiphenyl, model species for forming mixed halogenated aromatic compounds
- Creator
- Hou, Song; Dlugogorski, Bogdan Z.; Mackie, John C.; Kennedy, Eric M.; Jansson, Stina; Altarawneh, Mohammednoor
- Relation
- International Journal of Environment and Pollution Vol. 61, Issue 3-4, p. 243-260
- Publisher Link
- http://dx.doi.org/10.1504/IJEP.2017.087760
- Publisher
- Inderscience Enterprises
- Resource Type
- journal article
- Date
- 2017
- Description
- This contribution reports results from the gas-phase oxidation of 4-bromo-4'-chlorobiphenyl (4,4'-BCB) in order to fathom the formation of toxic species produced during the combustion of mixed halogenated aromatics. In their own right, mixed polybrominated/polychlorinated biphenyls (PXBs) represent a new class of environmental contaminants, recently detected in food and human tissues. Gas chromatography-quadrupole mass spectrometry (GC-QMS), gas chromatography-quadrupole time of flight mass spectrometry (GC-QTOFMS), Fourier transform infrared spectroscopy (FTIR) and ion chromatography (IC) served to analyse the volatile and semi-volatile organic compounds (V/SVOCs), including mixed halogenated dibenzo-p-dioxins and dibenzofurans (PXDD/Fs), and gaseous products including HBr/HCl. The selection of non-ortho substituted PXB as a model species yields a large number of halogenat ed compounds, including monochloro- and monobromobenzene and higher halogenated benzenes and naphthalenes and derivatives of halogenated benzenes (such as 1-chloro-4-ethynylbenzene). We also detect small amounts of chlorinated and mixed halogenated dibenzofurans. The present study provides insights into the formation of several classes of halogenated and mixed-halogenated pollutants in combustion processes involving both bromine and chlorine sources, such as those of brominated flame retardants and PVC plastics.
- Subject
- brominated and chlorinated biphenyls; halogenated VOC and SVOC; PXBs; 4-bromo-4’-chlorobiphenyl; halogenated aromatic compounds; formation mechanisms of trace pollutants
- Identifier
- http://hdl.handle.net/1959.13/1394566
- Identifier
- uon:33723
- Identifier
- ISSN:0957-4352
- Language
- eng
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