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

Wenjuan Wei; Corinne Mandin; Olivier Blanchard; Fabien Mercier; Maud Pelletier; Barbara Le Bot; Philippe Glorennec; Olivier Ramalho

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, 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

Document type :

Journal articles

Domain :

Environmental Sciences / Environmental Engineering

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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 : Thursday, July 11, 2019 - 1:00:59 AM
Long-term archiving on : Sunday, October 9, 2016 - 12:30:15 PM

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

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

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