A5091530085- Clay minerals and soil interactions
- Soil and Unsaturated Flow
- Iron oxide chemistry and applications
- Layered Double Hydroxides Synthesis and Applications
- Groundwater flow and contamination studies
- Mesoporous Materials and Catalysis
- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Enhanced Oil Recovery Techniques
- Immunotherapy and Immune Responses
- Glass properties and applications
- Hip disorders and treatments
- Atmospheric and Environmental Gas Dynamics
- Concrete and Cement Materials Research
- Microbial bioremediation and biosurfactants
- Radioactive element chemistry and processing
- Hydraulic Fracturing and Reservoir Analysis
- Orthopaedic implants and arthroplasty
- Health, Medicine and Society
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Musculoskeletal Disorders and Rehabilitation
- Fullerene Chemistry and Applications
- CO2 Sequestration and Geologic Interactions
- Calcium Carbonate Crystallization and Inhibition
Laboratoire Interdisciplinaire des Environnements Continentaux
2013-2024
Institut Universitaire de Cardiologie et de Pneumologie de Québec
2022
Centre National de la Recherche Scientifique
2005-2019
Université de Lorraine
2003-2019
Hôpital de la Conception
2018-2019
Saint John Regional Hospital
2012-2018
Metabolism and Renal Physiology
2013-2017
École Nationale Supérieure des Mines de Nancy
2003-2009
Stanford University
2006-2008
Stanford Medicine
2007
The nature of fullerene-water interactions and the role that they play in fate C60 aqueous systems is poorly understood. This work provides spectroscopic evidence for surface hydroxylation initially hydrophobic molecule when immersed water. mechanism appears to be basis stabilizing hydrophilic nC60 aggregates suspension. It remarkable such a chemical transformation dispersion are achieved under mild conditions readily produced an aquatic environment. acquired affinity water likely subsequent...
The interaction of water with a synthetic saponite clay sample, layer charge 1 per unit cell (0.165 C m(-2)), was investigated by following along adsorption and desorption in the relative pressure range from 10(-6) to 0.99 (i) adsorbed amount gravimetric near-infrared techniques, (ii) basal distance arrangement molecules interlayer X-ray neutron diffraction under controlled pressure, (iii) molecular structure (NIR) Raman spectroscopy pressure. results thus obtained were confronted Grand...
Abstract Ten montmorillonites of different origins with variable Fe contents were analysed using transmission IR spectroscopy. Special attention was devoted to the OH-bending region obtain information about distribution octahedral cations. For low medium (≤0.56 per Si 8 formula unit), a linear relationship between position δ AlFeOH band and content observed. Such correlation might be explained by changes in cis-trans occupancy sheet. Deconvolution domain allows us discriminate three...
Abstract FTIR spectroscopy has been applied to NH 4 + -exchanged dioctahedral clay minerals determine the molecular environment of and quantify N concentration. under vapourpressure control, coupled with heating freezing treatments shown that ion symmetry varies nature minerals. a perfect tetrahedral in hydrated or dehydrated smectites belongs T d group. The -bending vibration is centred at 1450 1425 cm –1 . Si 4+ -Al 3+ substitution induces loss elements tetrahedron which acquires C 2v...
This paper concerns the hydration and swelling behavior of four synthetic sodium saponite samples with general formula Nax(Si4-x,Alx)(Mg3)O10(OH)2, where x = 0.4, 0.5, 0.6, 0.7. The combination gravimetric water adsorption measurements X-ray diffraction experiments under controlled pressure allows us to analyze influence layer charge on mechanisms. When increases, occurs for lower values chemical potential, i.e., at relative pressure. In parallel, as cohesion between layers increases...
The interaction between metallic iron and kaolinite was studied in conditions relevant to those that may be encountered a high-level radioactive waste disposal facility geological formation. Experiments were carried out under anoxic atmosphere at 90 °C chloride solutions simulate close facilities. KGa-2 put contact with powdered batch experiments for durations of 1, 3, 9 months. Solutions extracted from the end-products analyzed (pH, Eh, conductivity, cation concentrations). End-products...
The hydration behavior of synthetic Na-magadiite was studied by combining thermal analyses, water adsorption gravimetry, X-ray diffraction, and infrared spectroscopy under controlled pressure. Thermal analyses reveal, at least, two distinct populations. isotherm exhibits steps low relative These correspond to three well-defined interlayer distances on the diffractograms. Infrared spectra recorded various pressures show For ≥ 0.20, some molecules (1665 cm-1) are doubly hydrogen bonded, likely...
Adsorption of prebiotic building blocks is proposed to have played a role in the emergence life on Earth. The experimental and theoretical study this phenomenon should be guided by our knowledge geochemistry habitable early Earth environments, which could spanned large range settings. being an interfacial phenomenon, experiments can built around minerals that probably exhibited largest specific surface areas were most abundant, i.e., phyllosilicates. Our current work aims at understanding...
The hydration behavior of synthetic magadiite exchanged with H+, Na+, K+, Mg2+, and Ca2+ was investigated by combining thermal analyses, water adsorption gravimetry, X-ray diffraction, spectroscopic techniques, including 29Si NMR, infrared, Raman under various pressures. Thermal analyses reveal distinct populations, the number which depends on valency cation. Except for H-magadiite, does not swell, isotherms exhibit two steps, corresponding to increases interlayer distance. These phenomena...
Abstract In this work, we have studied the affinity of pure C60 fullerenes with water. Although always been known as hydrophobic particles, show that characteristic does not remain when contact between and H2O is forced by mechanical stirring. Light scattering measurements transmission electron microscopy observations revealed presence aggregates remaining stable in water after stirring, a large nanometric size range. Water adsorption/desorption isotherms, confirmed hydrophilic character...