Evaporation of a volatile organic compound in a hygroscopic soil - influence of the airflow and its VOC vapour saturation

Bétaboalé Naon (1) , Jean-Claude Benet (2) , Bruno Cousin (2) , Fabien Cherblanc (2) , Ali Chammari (2)

1 UNB - Université Nazi Boni (Bobo-Dioulasso)
2 CGB - Couplages en Géomécanique et Biomécanique

This article presents an experimental and theoretical study of VOC volatilization in soil during a decontamination process by vapour extraction or venting. A phase change law is proposed in the case of a sandy-silty soil when the convective gaseous phase is vapour-charged. A simple experimental method for analyzing the phase change is presented. Finally, an efficiency coefficient is introduced to quantify the contribution of airflow velocity on venting.

Mots clés: venting; phase change; mass transfer; modelling; natural attenuation

Domaines: Autre

Bétaboalé Naon, Jean-Claude Benet, Bruno Cousin, Fabien Cherblanc, Ali Chammari. Evaporation of a volatile organic compound in a hygroscopic soil - influence of the airflow and its VOC vapour saturation. European Journal of Environmental and Civil Engineering, 2013, 17 (1), pp.46-63. ⟨10.1080/19648189.2012.720401⟩. ⟨hal-00761739⟩