Degradation and recovery of PAH by steam injection Characterization and Optimization 1 PhD student: Mr. BORDENAVE Alexandre Thesis director: Mr. ATTEIA Olivier Company representant: Mr. MAUNOURY Abel Journée des doctorants – Bordeaux – 06/03/15

CONTEXT OF THE STUDY 2 Journée des doctorants – Bordeaux – 06/03/15

Context of the study 3 Water table Bedrock Saturated zone Vadose zone Non Aqueous Phase Liquids (NAPL) Air of soil Bound water Matrix of soil Flow of groundwater table Polycyclic aromatic hydrocarbon (PAH) recalcitrant source of pollution. The water framework European directive (10/23/2000) sets very low PAHs concentration threshold. Journée des doctorants – Bordeaux – 06/03/15

Context of the study 4 PAHs – heavy compounds: Low volatility Low solubility Hard to oxidize PAHs – heavy compounds: Low volatility Low solubility Hard to oxidize Limitation of current methods to reach very low thresholds for concentrations. Low temperature oxidation into the soil as an alternative way. Dynamic under stripping (DUS): Steam injection – thermal process Volatile and semi-volatile compounds Saturated and unsaturated porous media (Hunt and al. 1988b) Heterogeneous porous media (Itamura 1996) Hydrous Pyrolysis Oxidation (HPO): Co-injection of air – degradation of contaminants by oxidation (Leif and al. 1998) + Journée des doctorants – Bordeaux – 06/03/15