A5023311873- Clay minerals and soil interactions
- Planetary Science and Exploration
- Hydrocarbon exploration and reservoir analysis
- Soil and Unsaturated Flow
- Enhanced Oil Recovery Techniques
- Astro and Planetary Science
- Microbial bioremediation and biosurfactants
- Mineral Processing and Grinding
- Iron oxide chemistry and applications
- Glass properties and applications
- Geochemistry and Geologic Mapping
- CO2 Sequestration and Geologic Interactions
- Geological and Geochemical Analysis
- Zeolite Catalysis and Synthesis
- Paleontology and Stratigraphy of Fossils
- Groundwater flow and contamination studies
- Heat and Mass Transfer in Porous Media
- Petroleum Processing and Analysis
- Methane Hydrates and Related Phenomena
- Hydraulic Fracturing and Reservoir Analysis
- Adsorption and biosorption for pollutant removal
- Concrete and Cement Materials Research
- Drilling and Well Engineering
- Space Exploration and Technology
- Thermal and Kinetic Analysis
Total (France)
2017-2021
Newcastle University
2005-2019
Agence Nationale pour la Gestion des Déchets Radioactifs
2010-2019
Fondation de Coopération Scientifique
2018
Los Alamos National Laboratory
2003-2005
St. Clair College
2003-2004
Université de Poitiers
2000
Centre National de la Recherche Scientifique
2000
A set of models for estimating the enthalpy formation, entropy, heat capacity and volume dehydrated phyllosilicates is presented. The model entropy estimation essentially based on a method decomposition into polyhedral units, similar to that published by Holland (1989). predicting formation electronegativity scale, as previously developed Vieillard (1994a, 1994b). For sake consistency, are parameterized using same critical selection thermodynamic properties from literature. This includes...
The commercial value of kaolin raw materials is greatly affected by the presence and content iron-bearing impurities, which can have a detrimental effect on whiteness refractoriness manufactured products. Because high cost environmental impact techniques currently used to remove these some effort now targeted toward development alternative methods, such as biological processes. This paper reports series anaerobic microcosm experiments conducted evaluate suitability iron-respiring bacteria...
Abstract Evaluating the timing and origin of quartz cement is central to understanding how porosity lost in sandstones during burial. Kinetic models cementation have been calibrated using large–scale datasets but never tested at microscopic level which forms. Here, we use high-precision, situ oxygen isotope analyses on sandstone from Jurassic Ness Formation North Sea reveal growth history single overgrowths a resolution 2 µm. Measured δ18O(cement) range +28 +20‰ V-SMOW early late are...
The stability of water ice, epsomite, and hexahydrite to loss H 2 O molecules the atmosphere at equatorial latitudes Mars was studied determine their potential contributions measured abundance water‐equivalent hydrogen (WEH). Calculation relative humidity based on estimates yearly averages water‐vapor pressures temperatures Martian surface used for this purpose. Water ice found be sufficiently unstable everywhere within 45° equator that if observed WEH is due it requires a low‐permeability...
<i>In-situ</i> sampling was performed in the Andra Meuse/Haute Marne (France) Underground Research Laboratory (URL) allowing study of two cement based materials/claystone interfaces that have undergone 4 to 5 years interaction. The first interface concerned a shotcrete sprayed on wall an access drift at laboratory level and second one, class G paste injected borehole filled from surface intercepted during excavation new gallery. In case, hydrodynamic conditions were controlled by ventilation...
The stability of clay minerals is an important factor in assessing the durability containment barriers for deep waste storage. In that context, complete thermodynamic data set three 2:1 ferro-magnesian have been determined at 1 bar and from 2 to 520 K, using calorimetric methods. studied samples were, respectively, Na-saturated saponite Sap-Ca-1, Na0.394 K0.021Ca0.038(Si3.569Al0.397Fe3+0.034)(Mg2.948Fe2+0.021Mn0.001)O10(OH)2, Ca-saturated nontronite NAu-1,...
Abstract Metakaolins formed by total dehydroxylation of kaolinite, dickite and nacrite were hydrothermally treated at 240 ° C, for 2, 21 or 182 days, initial pH = 5– 6 1. Kaolinite was the only mineral kaolin subgroup crystallized in these treatments. is less ordered 4– than This can be attributed to influence specific chemical, morphological, and/or crystalline properties metakaolins. Two different processes kaolinite formation crystal growth must involved depending on metakaolin. The first...