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Polycyclic aromatic compounds in particulate matter and indoor dust at preschools in Stockholm, Sweden: Occurrence, sources and genotoxic potential in vitro
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0003-4309-8282
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0002-1598-7093
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0002-3647-1811
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2021 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 755, article id 142709Article in journal (Refereed) Published
Abstract [en]

Children spend a significant amount of their day in preschool; thus, environmental quality at preschools may have an impact on children’s health. In the present study, we analyzed polycyclic aromatic compounds (PACs), including PAHs, alkylated PAHs and oxygenated PAHs (OPAHs), in indoor and outdoor air particulate matter (PM10) and indoor dust at preschools in Stockholm, Sweden. There were significant correlations between PAC levels in outdoor and indoor PM10, with in general higher PAC levels outdoors. Fluoranthene and pyrene were detected at highest levels in all sample types, although phenanthrene and methylated phenanthrene derivatives also were found at high levels in indoor dust. In addition, the highly carcinogenic PAHs 7H-benzo[c]fluorene, 7,12-dimethylbenz[a]anthracene, benz[j]aceanthrylene, and dibenzo[a,l]pyrene were detected in some samples. Benzanthrone was the most prevalent OPAH in PM10 samples and 9,10-anthraquinone in indoor dust. Based on diagnostic ratios and Positive Matrix Factorization we identified vehicle emission and biomass burning as important PAC sources for all samples analyzed. However, poor correlation between PAC levels in indoor PM10 and indoor dust suggested additional sources for the latter. Measuring activation of DNA damage signaling in human cells exposed to organic extracts of the samples indicated substantial genotoxic potential of outdoor PM10 and indoor dust. Determination of benzo[a]pyrene equivalents demonstrated that the highly potent PAHs benz[j]aceanthrylene and dibenz[a,h]anthracene contributed more than 20% to the total carcinogenic potency of the samples. We conclude that PAC levels at Stockholm preschools are relatively low but that outdoor air quality may impact on the indoor environment.

Place, publisher, year, edition, pages
2021. Vol. 755, article id 142709
Keywords [en]
PAHs, oxygenated PAHs, Positive Matrix Factorization, source apportionment, DNA damage signaling
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-185738DOI: 10.1016/j.scitotenv.2020.142709ISI: 000600537400057OAI: oai:DiVA.org:su-185738DiVA, id: diva2:1473713
Funder
Swedish Research Council Formas, 2019-00582Stockholm County Council, TRN 2015-0171Available from: 2020-10-06 Created: 2020-10-06 Last updated: 2022-02-25Bibliographically approved

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Lim, HwanmiSadiktsis, Ioannisde Oliveira Galvão, Marcos FelipeWesterholm, RogerDreij, Kristian

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Lim, HwanmiSadiktsis, Ioannisde Oliveira Galvão, Marcos FelipeWesterholm, RogerDreij, Kristian
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