Prediction of Organic Pollutants Transfers in Contaminated Soils Using an In-House Thermodynamic Calculator

Kouaho Kouame (1) , Simon V. Ayache (1) , Pauline Michel (1) , Pascal Mougin (1)

1 IFPEN - IFP Energies nouvelles

Regulations are becoming stricter and stricter regarding soil pollutions. At the same time the amount of money available to investigate the risks associated with soil pollutions remains limited. This paper proposes to investigate the transfer of pollutants by means of a quick running numerical tool. Indeed, this numerical tool based on equations of state has been developed to compute vapor-liquid or vapour-liquid-liquid thermodynamic equilibrium as a function of temperature and pressure. It has been specifically adapted for the study of organic pollutants in contaminated soils. This tool requires chemical information from the contaminated soil sample as input data. The soil must therefore be analysed to determine its characteristics and the total concentrations of pollutants. This information is used to calculate the overall mole fractions (zi) of each pollutant in the contaminated soil. These mole fractions are thus the input data for the numerical tool to perform the components or pollutants distribution calculation. The results of this tool, which is called Transfero-Pol, therefore depend on the input data obtained from the analysis of the contaminated soil. These results make it possible to understand the long-term distribution of pollutants within the different phases of the soil as a function of temperature. In this paper, the theory behind the numerical tool Transfero-Pol is derived. A case study is then presented to assess the results from Transfero-Pol by comparing them to the outputs of a commercial software.

Mots clés: Contaminated soil; Organic components; Transfer; Thermodynamic

Domaines: Ingénierie de l'environnement

Kouaho Kouame, Simon V. Ayache, Pauline Michel, Pascal Mougin. Prediction of Organic Pollutants Transfers in Contaminated Soils Using an In-House Thermodynamic Calculator. International Journal of Environmental Pollution and Remediation , 2022, 10, ⟨10.11159/ijepr22.001⟩. ⟨hal-03943929⟩