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Influence of Airborne Particles' Chemical Composition on SVOC Uptake from PVC Flooring-Time-Resolved Analysis with Aerosol Mass Spectrometry

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  • Axel C. Eriksson, Lund Univ, Lund University, Nucl Phys
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  • Christina Andersen, Lund Univ, Lund University, Dept Design Sci, Ergon & Aerosol Technol
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  • Annette M. Krais, Lund Univ, Lund University, Inst Lab Med, Occupat & Environm Med
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  • Jacob Kleno Nojgaard
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  • Per-Axel Clausen, Natl Res Ctr Working Environm, National Research Centre for the Working Environment
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  • Anders Gudmundsson, Lund Univ, Lund University, Dept Design Sci, Ergon & Aerosol Technol
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  • Aneta Wierzbicka, Lund Univ, Lund University, Dept Design Sci, Ergon & Aerosol Technol
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  • Joakim Pagels, Lund Univ, Lund University, Dept Design Sci, Ergon & Aerosol Technol

We sampled ammonium sulfate particles and indoor particles of outdoor origin through a small chamber covered with polyvinyl chloride flooring. We measured the uptake of semivolatile organic compounds (SVOCs) by the airborne particles in real time. The particles acquired SVOC mass fractions up to 10%. The phthalate ester (di(2-ethylhexyl)-phthalate) (DEHP), a known endocrine disruptor, contributed by approximately half of the sorbed SVOC mass. The indoor particles acquired a higher DEHP fraction than laboratory-generated ammonium sulfate aerosol. We attribute this increased uptake to absorption by organic matter present in the indoor particles. Using a thermodenuder to remove volatile components, predominantly organics, reduced the SVOC uptake. Positive matrix factorization applied to the organic mass spectra suggests that hydrocarbon-like organic aerosol (typically fresh traffic exhaust) sorbs DEHP more efficiently than aged organic aerosol. The SVOC uptake is one of the processes that modify outdoor pollution particles after they penetrate buildings, where the majority of exposure occurs. Particles from indoor sources, typically dominated by organic matter, will undergo such processes as well. Aerosol mass spectrometry improves the time resolution of experimental investigations into these processes and enables experiments with lower, relevant particle concentrations. Additionally, particle size-resolved results are readily obtained.

Original languageEnglish
JournalEnvironmental Science & Technology
Pages (from-to)85-91
Number of pages7
Publication statusPublished - 7 Jan 2020

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