Chloé Caurel

Université d'Orléans

Adresse e-mail chloe.caurel@univ-orleans.fr
Téléphone 02 38 49 25 46
Site internet https://www.researchgate.net/profile/Chloe_Caurel
Bâtiment ISTE, bureau R 159
Statut Non permanent, emploi Doctorant
Grand Programme Milieu poreux
Autre Grand Programme Biogéosystèmes

A propos...

Thèse : Processus à l'échelle des pores régissant la localisation et le développement des biofilms dans un milieu poreux bimodale: effet sur la mobilité du Cr, Cu, As et Pb

Directeurs : Ary BRUAND & Olivier ROZENBAUM
Encadrants : Sébastien DUPRAZ & Fabienne BATTAGLIA-BRUNET

Mots-Clés : Sol - Biofilms - Zone non saturée - Transferts - Milieu poreux - Expérimentation sur colonne - Micro fluidique

Financement : Labex Voltaire

Période : Février 2015- Décembre 2018

Valorisation (Articles, congrès) :
Ecole-chercheur/école thématique VIZMO: "Visualiser, modéliser, matérialiser les matières organiques et leurs interactions dans l’environnement", mars 2015, Nouan-le-Fuzelier, France.

Caurel C, Rozenbaum O, Dupraz S, Garrido F, Bruand A (ISTO, Orléans, France). Pore scale processes governing biofilms location and development in a dual porous media: Effect on CCA mobility. International workshop, PROTINUS project, July 2015, 20-22 th, Grenoble, France.(Poster)

Caurel C, Rozenbaum O, Dupraz S, Battaglia-Brunet F, Garrido F & Bruand A. Pore Scale Processes Governing Biofilms Location in a Dual Porous Media: Effects on Cr, Cu, Pb, and As Mobility. International conference, Goldschmidt, August 2017, 13-18 th, Paris, France (poster)

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PhD title: Pore scale processes governing biofilms location in a dual porous media: effects on Cr, Cu, Pb, and As mobility.

Supervisors: Ary BRUAND, Olivier ROZENBAUM, Sébastien DUPRAZ & Fabienne BATTAGLIA-BRUNET

Project summary:
Understanding in situ processes within the soil remains difficult, as coupling the spatial heterogeneity of soil structure and microbiological functions, because of the complexity of this media. Direct and non-destructive methods to switch from macro down to micro-scale are still poorly used, as well as the monitoring of communities activity at different scales. Non-invasive technics such as X-ray microtomography (X-ray µCT) are frequently used for soil characterization, but the observation of biofilms requires more complex image processing ( image segmentation and image analysis).
The aim of the present work was to understand the preferential microbial habitats conditions inside soil porosity and the biofilm effect on metals mobility. Our experimental device is based on two complementary different scale set up:
A bimodal porous media using mini columns (ᴓ 0.8cm) that creates different unsaturated conditions allowing activation of a specific range of pore size. Solutions from a soil highly polluted in metallics and metalloid elements (Cr, Cu, Pb and As) and associated microbial community percolated through these media.
Microfluidic analog device coupled with microscopic kinetic monitoring were also used, for analyse relations between (i) biofilm activity (ii) effect on porosity structure (iii) metal speciation, in the same conditions.
These results highlight the feedback relationship between the biofilm location and the speciation of metallic elements through porous media.

Source of funding: Labex Voltaire

Period: February 2015 - December 2018

Scientific production (Article, Conference) :
Ecole-chercheur/école thématique VIZMO: "Visualiser, modéliser, matérialiser les matières organiques et leurs interactions dans l’environnement", mars 2015, Nouan-le-Fuzelier, France.

Caurel C, Rozenbaum O, Dupraz S, Garrido F, Bruand A (ISTO, Orléans, France). Pore scale processes governing biofilms location and development in a dual porous media: Effect on CCA mobility. International workshop, PROTINUS project, July 2015, 20-22 th, Grenoble, France.(Poster)

Caurel C, Rozenbaum O, Dupraz S, Battaglia-Brunet F, Garrido F & Bruand A. Pore Scale Processes Governing Biofilms Location in a Dual Porous Media: Effects on Cr, Cu, Pb, and As Mobility. International conference, Goldschmidt, August 2017, 13-18 th, Paris, France (poster)