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Particle size distribution of halogenated flame retardants and implications for atmospheric deposition and transport
Masaryk University, Faculty of Science, RECETOX (Research Centre for Toxic Compounds in the Environment), Brno, Czech Republic.
Masaryk University, Faculty of Science, RECETOX (Research Centre for Toxic Compounds in the Environment), Brno, Czech Republic.
Masaryk University, Faculty of Science, RECETOX (Research Centre for Toxic Compounds in the Environment), Brno, Czech Republic.
Masaryk University, Faculty of Science, RECETOX (Research Centre for Toxic Compounds in the Environment), Brno, Czech Republic.
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2014 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 48, no 24, 14426-14434 p.Article in journal (Refereed) Published
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Text
Abstract [en]

This study investigates the distribution of polybrominated diphenyl ethers (PBDEs), hexabromocyclododecane (HBCD) and a group of novel flame retardants (NFRs) on atmospheric aerosols. Two high volume cascade impactors were used to collect particulate fractions of ambient air over a one year period at urban and rural sites. The majority of FRs were found on the finest aerosols (<0.95 mu m). Concentrations of HBCD were higher than those of SPBDEs. Moreover, we noted seasonality and spatial differences in particle size distributions, yet a large portion of the observed differences were due to differences in particulate matter (PM) itself. When normalized by PM, the size distributions of the FRs exhibited much greater heterogeneity. Differences existed between the FR distributions by molecular weight, with the higher molecular weight FRs (e.g., BDE-209, Dechlorane Plus) distributed more uniformly across all particulate size fractions. The seasonal, spatial, and compound-specific differences are of crucial importance when estimating dry and wet deposition of FRs as smaller aerosols have longer atmospheric residence times. Estimated wet and dry deposition of four representative FRs (BDE-47, BDE-209, HBCD, and Dechlorane Plus) using size-segregated aerosol data resulted in lower deposition estimates than when bulk aerosol data were used. This has implications for estimates of long-range atmospheric transport and atmospheric residence times, as it suggests that without size-specific distributions, these parameters could be underestimated for FRs.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2014. Vol. 48, no 24, 14426-14434 p.
National Category
Environmental Sciences
Research subject
Enviromental Science
Identifiers
URN: urn:nbn:se:oru:diva-49773DOI: 10.1021/es5044547ISI: 000346686100045PubMedID: 25380095Scopus ID: 2-s2.0-84907068318OAI: oai:DiVA.org:oru-49773DiVA: diva2:918904
Note

Funding Agencies:

EC 226534  PITN-GA-2010-264329

European Social Fund CZ.1.07/2.3.00/30.0037

State budget of the Czech Republic

Czech Ministry of Education LM2011028  LO1214

Available from: 2016-04-12 Created: 2016-04-12 Last updated: 2016-04-13Bibliographically approved

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