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Oxidation of 4-bromo-4'-chlorobiphenyl, model species for forming mixed halogenated aromatic compounds
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2017 (English)In: International Journal of Environment and Pollution, ISSN 0957-4352, E-ISSN 1741-5101, Vol. 61, no 3-4, p. 243-260Article in journal (Refereed) Published
Abstract [en]

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 halogenated 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.

Place, publisher, year, edition, pages
InderScience Publishers, 2017. Vol. 61, no 3-4, p. 243-260
Keywords [en]
brominated and chlorinated biphenyls, halogenated VOC and SVOC, PXBs, 4-bromo-4'- lorobiphenyl, halogenated aromatic compounds, formation mechanisms of trace pollutants
National Category
Analytical Chemistry Environmental Sciences
Identifiers
URN: urn:nbn:se:umu:diva-142005DOI: 10.1504/IJEP.2017.10008686ISI: 000414248400005OAI: oai:DiVA.org:umu-142005DiVA, id: diva2:1158955
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Bio4EnergyAvailable from: 2017-11-21 Created: 2017-11-21 Last updated: 2019-09-02Bibliographically approved

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Jansson, Stina

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