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Epoxide formation from heterogeneous oxidation of benzo[a]pyrene with gas-phase ozone and indoor air
Department of Chemistry, University of Toronto, Toronto, Canada.
Örebro University, School of Science and Technology. Department of Chemistry, University of Toronto, Toronto, Canada. (MTM Research Centre)ORCID iD: 0000-0001-6800-5658
Department of Chemistry, University of Toronto, Toronto, Canada.
Department of Chemistry, University of Toronto, Toronto, Canada.
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2017 (English)In: Environmental Science: Processes & Impacts, ISSN 2050-7887, E-ISSN 2050-7895, Vol. 19, no 10, 1292-1299 p.Article in journal (Refereed) Published
Abstract [en]

The formation of two classes of epoxide products from the heterogeneous reaction of benzo[a]pyrene (BaP) with gas-phase ozone was demonstrated. BaP was coated on a Pyrex glass tube and oxidized with different concentrations of ozone. After oxidation, the epoxide products were derivatized by N-acetylcystein (NAC) and then analyzed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The results show that in addition to mono-epoxides, diol-epoxides were also formed. BaP exposed to genuine indoor air also produces mono- and diol-epoxides, having similar chromatograms to those produced by oxidation of BaP by low concentrations of ozone. Although it is well recognized that diol-epoxides are formed from BaP oxidation in the human body and that they exhibit carcinogenicity via formation of adducts with DNA, this is the first demonstration that such classes of compounds can be formed by abiotic heterogeneous oxidation.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2017. Vol. 19, no 10, 1292-1299 p.
National Category
Environmental Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:oru:diva-61513DOI: 10.1039/c7em00181aISI: 000413199000008PubMedID: 28848957Scopus ID: 2-s2.0-85031785683OAI: oai:DiVA.org:oru-61513DiVA: diva2:1148944
Note

Funding Agencies:

Alfred P. Sloan Foundation  

NSERC 

Available from: 2017-10-13 Created: 2017-10-13 Last updated: 2017-11-07Bibliographically approved

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Yeung, Leo W. Y.

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