Experimental and numerical characterization of toluene transport and bioremediation processes using spectral induced polarization
Résumé
Polluted soils are often the result of more or less recent anthropogenic activities, and constitute major societal issues. A recent study (Froger et al., 2021) estimates that 30% of the surface area of France has polycyclic aromatic hydrocarbon (PAH) concentrations in soils above 100 µg.kg-1 . Once in the underground surface, these pollutants pose a risk to groundwater and drinking water supplies. Biodegradation in many regards can be an environmental-friendly remediation technique. This technique involves the decomposition of organic pollutants by micro-organisms. Many studies have highlighted the sensitivity of spectral induced polarization (SIP) to bacterial growth, biodegradation and bacterial activities such as mineral and biofilm production (e.g. Davis et al., 2006; Atekwana and Slater, 2009; Abdel Aal et al., 2010; Kessouri et al., 2019). All these studies focused on describing the influence of biodegradation on SIP without providing a method for quantification. To date, very little work has been done to quantitatively study the SIP response of bacteria in porous media. This work, part of the ANR project IMAGE, aims to develop: (i) petrophysical relationships at a column scale, linking complex conductivity to toluene biodegradation processes and (ii) a process-based inversion scheme coupled with a stochastic approach
Domaines
Sciences de l'environnementOrigine | Fichiers produits par l'(les) auteur(s) |
---|