Présentation
Christophe Tournassat is a Professor at the University of Orléans, France, and the Director of OSUC (Observatoire des Sciences de l'Univers en Région Centre-Val-de-Loire), which is the Earth and Space Sciences Observatory in Orléans. He is also a Visiting Faculty in the Energy Geosciences Division, Earth and Environmental Sciences Area at the Lawrence Berkeley National Laboratory, USA.
Christophe Tournassat holds B.Sc. and M.Sc. degrees in Earth Sciences from the Ecole Normale Supérieure de Lyon, France, a Ph.D. in Environmental Geochemistry from the University of Grenoble, France, and an "Habilitation à diriger des recherches" in Geology from the University of Nantes, France. His scientific interest covers a range of topics from thermodynamics and kinetics of low-temperature water/solutes/rock interactions to multi-scale numerical modeling of retention and transfer processes in geological media. He co-develops, with Carl Steefel, the code CrunchODiTi, which can simulate coupled non-Fickian/non-Darcian transport together with reactive processes in nanoporous media. Christophe Tournassat is an associate editor of Geochimica et Cosmochimica Acta, and is a member of the editorial board of Applied Clay science. He is the 2023 recipient of the Marion L. and Chrystie M. Jackson Mid-Career Clay Scientist Award of the Clay Mineral Society.
Publications
Publications
Reactive Transport in Natural and Engineered Systems85, 2019, ⟨10.1515/9781501512001⟩ |
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Natural and engineered clay barriersChristophe Tournassat; Carl I. Steefel; Ian C. Bourg; Faiza Bergaya. Elsevier, 6, 432 p., 2015, Developments in clay science, 9780081000274 |
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Modeling the long-term stability of multi-barrier systems for radioactive waste disposal in geological clay formationsYitian Xiao; Fiona Whitaker; Tianfu Xu; Carl Steefel. Reactive Transport Modeling: Applications in Subsurface Energy and Environmental Problems, , pp.CHAPTER 8, 2018, 9781119060000. ⟨10.1002/9781119060031.ch8⟩ |
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Impact of microstructure on anion exclusion in compacted clay mediaThorsten Schäfer; Reiner Dohrmann; H.C. Greenwell. The Clay Minerals Society Workshop Lectures Series, 21, pp.137-149, 2016, FILLING THE GAPS – FROM MICROSCOPIC PORE STRUCTURES TO TRANSPORT PROPERTIES IN SHALES, ⟨10.1346/CMS-WLS-21.11⟩ |
Reactivity of bentonite : an additive model applied to uranyl sorptionJ. Lützenkirchen. Surface complexation modelling, Elsevier, pp.539-552, 2006, Interface Science and Technology, ⟨10.1016/S1573-4285(06)80064-5⟩ |
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Interactions cations - argiles : le cas du Fe(II). Application au contexte de stockage profond des déchets radioactifsIngénierie de l'environnement. Université Joseph-Fourier - Grenoble I, 2003. Français. ⟨NNT : ⟩ |
Reactive transport models are cornerstone tools for optimizing the phytostabilization management of mining residuesAQUACONSOIL, Jun 2025, Liège, Belgium |
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The role of explicit polarizability in molecular modeling of clay-water interfaces across hydration statesCECAM International Symposium "Molecular modeling in soil science – achievements and perspectives", Sep 2025, Vienna, Austria |
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Selenate uptake by green rustGoldschmidt 2023, Jul 2023, Lyon, France |
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Ion Transport in Fractured ShaleAGU Fall Meeting 2022, 2022, à renseigner, Unknown Region |
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Competitive sorption processes at clay surfaces: Experimental and modeling approaches8th International Conference on Clays in Natural and Engineered Barriers for Radioactive Waste Confinement, Jun 2022, Nancy, France |
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porousMedia4Foam: An open-source multiphase reactive transport platform based on OpenFOAM for geothermal applicationsEuropean Geothermal Congress 2022, Oct 2022, BERLIN, Germany |
A Prediction of Uranium(VI) Diffusion in Montmorillonite at Various Chemical Solution ConditionsHow to integrate geochemistry at affordable costs into reactive transport for large-scale systems, Feb 2020, Helmholtz-Zentrum Dresden-Rossendorf, Germany |
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A "lab-on-a-chip" experiment for assessing mineral precipitation processes in fractured porous mediaEGU General Assembly 2020, May 2020, Online, France. ⟨10.5194/egusphere-egu2020-13613⟩ |
Fate of Gluconic Acid in Context of Radioactive Waste Disposal: Batch Experiments29th International Meeting on Organic Geochemistry, Sep 2019, Gothenburg, Sweden. pp.1-2, ⟨10.3997/2214-4609.201902763⟩ |
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Ion exchange in fougèrite: influence of crystal size and structural defectsEuroclay 2019, Jul 2019, Paris, France |
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Retention of arsenic, chromium and boron on an outcropping clay-rich rock formation (the Tégulines Clay, eastern France)Euroclay, Jul 2019, Paris, France |
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Multi-component reactive transport in a claystone: insights from a ten-year alkaline in situ injection experiment17th International Conference on the Chemistry and Migration Behavior of Actinides and Fission Products in the Geosphere, Sep 2019, kyoto, Japan |
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Influence of calcite on uranium(VI) sorption onto montmorillonite clayNational Meeting of the American-Chemical-Society, Mar 2019, philadelphie, United States |
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Modeling of coupled processes in nanoporous media. From molecular dynamics information to reactive transport modelingGoldschmidt Conference, Aug 2019, Barcelone, Spain |
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Ion exchange in fougèrite: influence of crystal size and structural defectsGoldschmidt 2019, Aug 2019, Barcelone, Spain |
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Coupling clay swelling properties to hydro-geochemical conditions: a reactive transport modeling approachDECOVALEX 2019 Symposium, Nov 2019, Brugg, Switzerland |
Simulating uranium(VI) diffusion in sodium-montmorillonite as a function of chemical solution conditions257th National Meeting of the American-Chemical-Society, Mar 2019, Orlando, United States |
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A mean electrostatic model for ion transport through heterogeneous clayEuroclay 2019, Jul 2019, Paris, France |
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From microstructure description to macro-scale properties of clay barriersCouFrac - International Conference on Coupled Processes in Fractured Geological Media: Observation, Modeling, and Application, Nov 2018, Wuhan, China |
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Shales and geological waste repositories: from microstructure description to macro-scale propertiesComputational Methods in Water Resources XXII - CMWR 2018, Jun 2018, Saint-Malo, France |
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Multi-Continuum Reactive Transport Modeling Approaches for Heterogeneous Clay Media: Overview and ChallengesAGU Fall Meeting, Dec 2018, Washington, DC, United States |
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Retention behavior of As, Cr, B, Hg, and Cd on Teguline Clay samplesClay Conference 2017, Sep 2017, Davos, Switzerland |
Diffusion in clays. Continuum and micro-continuum approaches9th International Conference on Porous Media & Annual Meeting 2017, May 2017, Rotterdam, Netherlands |
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Kinetics and Mechanisms of Ni Sorption by Nanocrystalline VernaditeGoldschmidt 2017, Aug 2017, Paris, France |
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Modeling the acid-base properties of montmorillonite edge surfacesClay Conference 2017, Sep 2017, Davos, Switzerland |
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MODELING URANIUM(VI) ADSORPTION ONTO MONTMORILLONITE UNDER VARYING CARBONATE CONCENTRATIONS: A SURFACE COMPLEXATION MODEL ACCOUNTING FOR THE SPILLOVER EFFECT ON SURFACE POTENTIALMigration, Sep 2017, Barcelona, Spain |
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Imaging a pore network in a clay-rock at the sub-nanometer scale9th International Conference on Porous Media & Annual Meeting, May 2017, Rotterdam, Netherlands |
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Redox potential measurements in a claystoneClay Conference 2017, Sep 2017, DAVOS, Switzerland |
Shales and geological waste repositories: from microstructure description to macro-scale propertiesAmerican Geophysical Union, 2017, San Franciscp, United States |
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Molecular dynamics simulations of anion exclusion in clay interlayer nanopores14éme Colloque du Groupe Français des Argiles, May 2016, Poitiers, France |
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Profil d'altération dans les argiles tégulines, Bassin de Paris, France25e Réunion des Sciences de la Terre, Oct 2016, Caen, France |
Diffusion in clays: molecular scale view, continuum scale modeling and importance of microstructureGoldschmidt 2016, Jun 2016, Yokohama, Japan |
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Anion exclusion and diffusion in smectite clay barriers252nd American Chemical Society National Meeting & Exposition, Aug 2016, Philadelphia, United States |
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Breakdown of the modified Gouy-Chapman model for clay surfaces in equilibrium witha CaCl 2 electrolyte: a molecular dynamic studyClays in Natural and Engineered Barriers for Radioactive Waste Confinement, Mar 2015, Brussels, Belgium |
Uranium(VI) Diffusion in Sodium-Montmorillonite at Alkaline pH14ème Colloque du Groupe Français des Argiles, May 2016, Poitiers, France |
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Kinetic experiments in order to determine the rate of oxygen consumption by the Callovian-Oxfordian argillaceous rockClays in natural and engineered barriers for radioactive waste confinement, Mar 2015, Bruxelles, Belgium |
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Carbonates reactivity in temperature and interactions with Fe- mineralsClay Conference, Mar 2015, Bruxelles, Belgium |
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Study of dolomite dissolution at various temperatures – Evidence for the formation of nanocrystalline secondary phases at dolomite surface and influence on dolomite interactions with other minerals2015 AGU Fall meeting, American Geophysical Union, Dec 2015, San Francisco, United States |
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Impact of microstructure on anion exclusion in compacted clay mediaEuroclay 2015, Clay Mineral Society, Jul 2015, Edinburgh, United Kingdom |
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Structural defects in layered structures: Their determination and their impact on reactivityClays in natural and engineered barriers for radioactive waste confinement: 6th international conference, Mar 2015, Bruxelles, Belgium |
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Retention processes in clay-rocksGoldschmidt 2015, Aug 2015, Prague, Czech Republic |
In situ diffusion test of hydrogen gas in the Opalinus Clay5th Conference on Clays in Natural and Engineered Barriers for Radioactive Waste Confinement, 2012, Montpellier, France. pp.563-578, ⟨10.1144/SP400.12⟩ |
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Molecular dynamics simulations of cation adsorption at mica-water interfaces248th National Meeting of the American-Chemical-Society (ACS), Aug 2014, San Francisco, United States |
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Impacts of pore structure and diffusion-accessible porosity for calcium-bromide diffusion in sodium-montmorillonite248th National Meeting of the American-Chemical-Society (ACS), Aug 2014, San Francisco, United States |
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Quantification of the breakdown of modified Gouy-Chapman model for 2:1 salt background electrolyte: A molecular dynamic study248th National Meeting of the American-Chemical-Society (ACS), Aug 2014, San Francisco, United States |
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Controls of Ca/Mg/Fe activity ratios in pore water chemistry models of the Callovian--Oxfordian Clay FormationFourteenth International Symposium on Water-Rock Interaction, WRI 14, Jun 2013, Avignon, France. pp.475-478, ⟨10.1016/j.proeps.2013.03.133⟩ |
Thermoddem: an example of alive thermochemical databaseGoldschmidt Conference 2013, Aug 2013, Florence, Italy. under process |
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Monitoring and modeling the behavior of synthetic cementitious like pore waters injected in an equipped borehole of the Meuse Haute Marne Underground Research LaboratoryThird International Workshop on Mechanisms and Modeling of Cement/Waste Interactions, May 2013, Ghent, Belgium |
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Avancées dans le domaine de la thermodynamique des minéraux argileux11ème colloque du Groupe Français des Argiles (GFA), Apr 2013, Ivry-sur-Seine, France |
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Chemical homologue speciation in natural systems: a key to understand the anthropogenic RN fateGoldschmidt 2013, Aug 2013, Florence, Italy |
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Influence of temperature on the geochemistry of Callovo-oxfordian argillite: batch experiments and modelling at 80°CInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Investigations on structural iron electrochemical properties in layered silicates using massive mica electrodesInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Prediction of nickel mobility in a clayey formation requires accurate knowledge of the mineralogical assemblageInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
Diagenetic carbonates in clay-rich marine formationsInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Caesium uptake by Callovian-Oxfordian clayrock under alkaline perturbationInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Cement water injection in an equipped borehole of the Meuse Haute Marne Underground Research Laboratory: monitoring and modelingClays in Natural and Engineered Barriers for Radioactive Waste Confinement, Oct 2012, Montpellier, France |
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Cement/clay interactions: feedback on the increasing complexity of modeling assumptionsInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Modeling the dioctahedral smectites layer charge variation versus structural Iron reduction levelInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Diffuse transport in clay media: µm to nm scale characterization of pore space and mineral spatial organizationInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Induced polarization of clay-sand mixtures: experiments and modellingInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Modelling specific adsorption of divalent metals on montmorillonite surfaces. Pitfalls, recent achievements and current challenges.International meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
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Pyrite-electrode potential measurements in reference solutions versus measured and computed redox potential: at the roots of an innovative generic pH electrode for nuclear waste repositoriesInternational meeting "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Oct 2012, Montpellier, France |
Anions in clay materials : a case study for multi-scale modeling approachesGoldschmidt 2011, Aug 2011, Prague, Czech Republic |
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Considering clay rock heterogeneity in radionuclide retentionClays in Natural & Engineered Barriers for Radioactive Waste Confinement, Mar 2011, Nantes, France |
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Comparative EPMA and μ-XRF methods for mapping micro-scale distribution of iodine in biocarbonates of the Callovian-Oxfordian clayey formation at Bure, Eastern part of the Paris Basin12th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere (Migration '09), Sep 2009, Kennewick, United States. pp.271-277, ⟨10.1016/j.pce.2010.04.003⟩ |
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CO2 partial pressure in clayrocks: a general modelWater-Rock Interaction WRI-13, Aug 2010, Guanajuato, Mexico. pp.855-858 |
Synthesis, characterization and properties of iron-rich Na montmorilloniteEuroclay 2007, Jul 2007, Aveiro, Portugal |
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Reactivity of ferrous iron in anoxic environments: electron transfers in Se(IV)-Fe(II) mineral systems232nd ACS National Meeting, Sep 2006, San Francisco, United States |
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Synthetic montmorillonite containing iron: preparation and caracterization1st. Annual Workshop, 6TH EC FP - FUNMIG IP, Nov 2005, Paris, France |
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Sorption-induced reversible oxidation of Fe(II) a the montmorillonite/water interface. A Mössbauer Study1st. Annual Workshop, 6TH EC FP - FUNMIG IP, Nov 2005, Paris, France |
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Evidences of the Fe(II) high redox reactivity in clay phases of Callovian-Oxfordian clay-stones. A Mössbauer study1st. Annual Workshop 6TH EC FP - FUNMIG IP, Nov 2005, Paris, France |
Multi-Component Reactive Transport in a Claystone: Insights from a Ten-Year Alkaline In Situ Injection ExperimentGoldschmidt2023 - International conference on geochemistry and related subjects,, Jul 2023, Lyon, France. |
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Mechanisms of anion sorption by hydrated calcium aluminates (AFm)Clay Conference 2022, Jun 2022, Nancy, France |
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Impact of green rust structure on anion exchange processesYNHM 2018, Mar 2018, Paris, France |
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Weathering profile in a near-surface aquitard : example of the teguline Clay, East Paris Basin, FranceClay Conference 2017, Sep 2017, Davos, Switzerland |
Montmorillonite particles size distribution and edge surfaces orientation using AFM imaging7th International Conference "Clays in Natural and Engineered Barriers for Radioactive Waste Confinement", Sep 2017, Davos, Switzerland. 2017 |
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Oxidation kinetics of tailings from the Callovo-Oxfordian argillites: flow-through experiments and modelling at the reactor scaleClay Conference 2017, Sep 2017, Davos, Switzerland |
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Geochemistry of Callovo-oxfordian argillite at 80 °C : batch experiments and modelingClays in Natural and Engineered Barriers for Radioactive Waste Confinement - 6th International Conference, Mar 2015, Bruxelles, Belgium |
Chemical evolution of a HLW cell in Callovo-Oxfordian Claystone: taking into account the oxic transient periodClays in Natural and Engineered Barriers for Radioactive Waste Confinement, Mar 2015, Bruxelles, Belgium |
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Influence of surface conductivity on the apparent zeta potential of homoionic montmorillonite particlesClay Conference : Clays in Natural and Engineered Barriers for Radioactive Waste, Mar 2015, Bruxelles, Belgium |