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See detailHydro-mechanical simulation in a deep excavation in Boom Clay
Hong, P.Y.; Cui, Y.J.; Pereira, J.M. et al

Poster (2015, March)

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See detailHydrocarbons contamination of smoked shrimp, an expanding food condiment in Beninese local markets
Kpoclou, Euloge; Brose, François ULg; Anihouvi, V.B. et al

Poster (2013, April 18)

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See detailA hydrochemical - isotopic approach for assessing factors controlling the regional pollution of an urban aquifer
Gesels, Julie ULg; Orban, Philippe ULg; Popescu, Ileana-Cristina et al

Poster (2015, June 24)

The alluvial aquifer of the Meuse River is contaminated at regional scale in the urbanized and industrialized area of Liège in Belgium, in particular inorganics pollutants such as sulfate, nitrate and ... [more ▼]

The alluvial aquifer of the Meuse River is contaminated at regional scale in the urbanized and industrialized area of Liège in Belgium, in particular inorganics pollutants such as sulfate, nitrate and ammonium. The sources of those contaminants are numerous: brownfields, urban waste water, subsurface acid mine drainage from former coal mines, atmospheric deposits related to former pollutants emissions in the atmosphere ... Sulfate, nitrate and ammonium are both typical pollutants of the aquifer and tracers of the possible pollution sources. In the Water Framework Directive context, a detailed hydrogeochemical characterization of groundwater was performed. The aim is to determine the origin of the inorganic contaminations, the main processes contributing to poor groundwater quality and the spatial extent of the contaminations. A large hydrochemical sampling campaign was performed, based on 71 selected representative sampling locations, to better characterize the different vectors (end-members) of contamination of the alluvial aquifer and their respective contribution to groundwater contamination in the area. Groundwater samples were collected and analyzed for major and minor compounds and metallic trace elements. The analyses also include stable isotopes in water, sulfate, nitrate, ammonium, dissolved inorganic carbon, boron and strontium. Different hydrogeochemical approaches are combined to obtain a global understanding of the hydrogeochemical processes at regional scale. Hydrochemical interpretations are based on classical diagrams, spatial distribution maps, geochemical equations, multivariate statistics such as self-organizing maps and isotopic analyses. With this combined approach, the location of the contaminant sources and most contaminated sectors of the alluvial aquifer together with a better understanding of geochemical processes involved are obtained. Redox processes strongly influence the composition of groundwater, specifically for compounds degrading the quality of groundwater in the area (sulfate, nitrate and ammonium). The highest concentrations of sulfate can be associated with the post-mining stage in the acid mine drainage process. Various reactions involving nitrogen compounds have been identified and allow a better understanding of causes of high concentrations of ammonium and nitrate. Denitrification and sulphate reduction are also demonstrated based on isotopic ratios. [less ▲]

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See detailHydroCube: a new entity-relationship hydrogeological data model
Wojda, Piotr; Brouyère, Serge ULg; Derouane, Johan et al

in Hydrogeology Journal (2010), 18(8), 1953-1962

Managing, handling, and accessing hydrogeological information depend mainly on the applied hydrogeological data models, which differ between institutions and across countries. Growing interest in ... [more ▼]

Managing, handling, and accessing hydrogeological information depend mainly on the applied hydrogeological data models, which differ between institutions and across countries. Growing interest in hydrogeological information diffusion, combined with a need for information availability, require the convergence of hydrogeological data models to make hydrogeological information accessible to multiple users such as universities, administrations, water suppliers, and research organisations. Furthermore, because hydrogeological studies are complex, they require a large variety of high-quality hydrogeological data with appropriate metadata in clearly designed and coherent structures. A need therefore exist to develop and implement hydrogeological data models that cover, as much as possible, the full hydrogeological domain. To respond to these requirements, a new data model, called HydroCube, has been developed for the Walloon Region in Belgium. The HydroCube model presents an innovative holistic “project-based” approach, which covers a full set of hydrogeological concepts and features, allowing for effective hydrogeological project management. This approach enables to store data about the project localisation, hydrogeological equipment, related observations and measurements. In particular, the model focuses on specialized hydrogeological field experiments, such as pumping and tracer tests. This logical data model uses entity-relationship diagrams and it has been implemented in the MS Access environment as the HydroCube database. It has been additionally enriched with a fully functional user-interface. [less ▲]

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See detailHydrodéchloration catalytique de composés organochlorés
Heinrichs, Benoît ULg

Learning material (2004)

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See detailHydrodéchloration sélective du 1,2-dichloroéthane en éthylène sur un catalyseur xérogel Pd-Ag/SiO2
Heinrichs, Benoît ULg; Delhez, P.; Pirard, Jean-Paul ULg et al

in Récents Progrès en Génie des procédés (1997, September 24)

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See detailHydrodechlorination of 1,2-dichloroethane into ethylene : selectivity of Pd-Ag alloys of known surface composition
Heinrichs, Benoît ULg; Lambert, Stéphanie ULg; Schoebrechts, Jean-Paul et al

in Heterogeneous Catalysis, Proceedings of the 9th International Symposium (2000, September 23)

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See detailHydrodechlorination of 1,2-dichloroethane on Pd-Ag catalysts supported on tailored texture carbon xerogels
Job, Nathalie ULg; Heinrichs, Benoît ULg; Ferauche, Fabrice et al

in Catalysis Today (2005), 102

Porous carbon xerogels synthesized in a previous study were investigated as catalysts supports. The support chosen was a micro-mesoporous carbon xerogel obtained from the pyrolysis of a resorcinol ... [more ▼]

Porous carbon xerogels synthesized in a previous study were investigated as catalysts supports. The support chosen was a micro-mesoporous carbon xerogel obtained from the pyrolysis of a resorcinol-formaldehyde resin whose synthesis variables were fixed at suitable values. Palladium and silver were deposited on this tailored texture carbon by co-impregnation using a solution of palladium and silver nitrates in nitric acid and water. Several catalysts were prepared with various Pd and Ag global contents, the latters being measured experimentally. Alloy particles, detected in all bimetallic samples, were studied by a combination of various techniques that enabled us to obtain their size as well as their bulk and surface composition. When present, the fraction of unalloyed silver was also calculated. The characterization data were related to the results of catalytic tests obtained for selective hydrodechlorination of 1,2-dichloroethane into ethylene. Results show that when the Ag content is too high, pure Ag particles are formed and the alloy composition remains constant. As a consequence, the surface composition of the alloy is constant as well and the catalytic tests lead to similar results. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

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See detailHydrodechlorination of 1,2-dichloroethane on Pd-Ag catalysts supported on texture-tailored materials
Job, Nathalie ULg; Heinrichs, Benoît ULg; Ferauche, Fabrice et al

Conference (2004, July 19)

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See detailHydrodynamic and hydrodispersive behaviour of chalk under variably saturated conditions
Brouyère, Serge ULg

Conference (2003, March 11)

The presentation describes a conceptual and mathematical model for solute migration in variably saturated fractured dual porosity, dual permeability chalk

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See detailHydrodynamic and hydrodispersive behaviour of variably saturated chalk : a field investigation
Brouyère, Serge ULg

Conference (2003, March 19)

The presentation described field investigations on contaminant transport across unsaturated chalk rocks, including tracer tests

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See detailHydrodynamic Approaches to Design Balancing Ponds
Pirotton, Michel ULg

in Marshall, English; Andras, Szollosi-Nagy (Eds.) Managing Water: Coping with Scarcity and Abundance (1997)

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See detailHydrodynamic forces acting on vertically translating bodies in free surface water
Kerger, François ULg; Detrembleur, Sylvain ULg; Archambeau, Pierre ULg et al

in WIT Transactions on The Built Environment, Vol 105, Fluid Structure Interaction V (2009, May)

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See detailHydrodynamic modelling, damage evaluation and technical adaptation measures
Dewals, Benjamin ULg

Conference (2008, January 10)

Detailed reference viewed: 5 (2 ULg)