Temperature dependence of the particle/gas partition coefficient: An application to predict indoor gas-phase concentrations of semi-volatile organic compounds

Wenjuan Wei 1, * Corinne Mandin 1, 2, 3 Olivier Blanchard 2, 4 Fabien Mercier 2, 4, 3 Maud Pelletier 2, 4 Barbara Le Bot 4, 2, 3 Philippe Glorennec 2, 4 Olivier Ramalho 1
* Corresponding author
1 CSTB - Centre Scientifique et Technique du Bâtiment
2 Irset - Institut de recherche en santé, environnement et travail
3 LERES - Laboratoire d'étude et de recherche en environnement et santé
4 EHESP - École des Hautes Études en Santé Publique [EHESP]
Abstract : The indoor gas-phase concentrations of semi-volatile organic compounds (SVOCs) can be predicted from their respective concentrations in airborne particles by applying the particle/gas partitioning equilibrium. The temperature used for partitioning is often set to 25 °C. However, indoor temperatures frequently differ from this reference value. This assumption may result in errors in the predicted equilibrium gas-phase SVOC concentrations. To improve the prediction model, the temperature dependence of the particle/gas partition coefficient must be addressed. In this paper, a theoretical relationship between the particle/gas partition coefficient and temperature was developed based on the SVOC absorptive mechanism. The SVOC particle/gas partition coefficients predicted by employing the derived theoretical relationship agree well with the experimental data retrieved from the literature (R > 0.93). The influence of temperature on the equilibrium gas-phase SVOC concentration was quantified by a dimensionless analysis of the derived relationship between the SVOC particle/gas partition coefficient and temperature. The predicted equilibrium gas-phase SVOC concentration decreased by between 31% and 53% when the temperature was lowered by 6 °C, while it increased by up to 750% when the indoor temperature increased from 15 °C to 30 °C.
Keywords : Partitioning SVOCs Equilibrium Indoor air quality
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Journal articles
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01313749
Contributor : Laurent Jonchère <>
Submitted on : Friday, July 8, 2016 - 2:05:00 PM
Last modification on : Friday, November 29, 2019 - 1:47:02 AM
Long-term archiving on: Sunday, October 9, 2016 - 12:30:15 PM

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CSTB | IRSET | UNIV-RENNES1 | IRSET-LERES | BIOSIT | EHESP | UR1-UFR-SVE | USPC | UNIV-ANGERS | IRSET-9 | IRSET-EHESP | UNIV-RENNES | DSETGS | IRSET-HIAEC

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Wenjuan Wei, Corinne Mandin, Olivier Blanchard, Fabien Mercier, Maud Pelletier, et al.. Temperature dependence of the particle/gas partition coefficient: An application to predict indoor gas-phase concentrations of semi-volatile organic compounds. Science of the Total Environment, Elsevier, 2016, 563–564, pp.506-512. ⟨10.1016/j.scitotenv.2016.04.106⟩. ⟨hal-01313749⟩

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