Highlighting of a local non-equilibrium thermodynamics during the transfer of trichlorethylene (TCE) in the superficial layers of arid soils

Samuel Ouoba (1) , Bruno Cousin (2) , David Y. Toguyeni (1) , Salifou. K. Ouiminga (1) , Fabien Cherblanc (2, 3) , Jean Koulidiati (1) , Jean-Claude Benet (2, 3)

1 Laboratoire de Physique et de Chimie de l'Environnement
2 LMGC - Laboratoire de Mécanique et Génie Civil
3 BIOTIC - Biomécanique des Interactions et de l'Organisation des Tissus et des Cellules

In this paper, we analyze and model the mass transfer of trichloroethylene in the surface layer of a soil. Our study essentially focuses on arid soils taking into account the phase change liquid-vapor. We have then examined the validity of the assumption of local equilibrium by comparing the values of the instantaneous pressure of the trichloroethylene vapor and the equilibrium vapor pressure during the transfer process. It appears that the assumption of local equilibrium during the transfer of trichloroethylene cannot be admitted.

Mots clés: transfer; non-equilibrium; trichloroethylene; arid soil; phase change

Domaines: Géotechnique

Samuel Ouoba, Bruno Cousin, David Y. Toguyeni, Salifou. K. Ouiminga, Fabien Cherblanc, et al.. Highlighting of a local non-equilibrium thermodynamics during the transfer of trichlorethylene (TCE) in the superficial layers of arid soils. European Journal of Environmental and Civil Engineering, 2015, 19 (9), pp.1096-1107. ⟨10.1080/19648189.2014.996672⟩. ⟨hal-01306073⟩