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Extraction of water and solutes from argillaceous rocks for geochemical characterisation: Methods, processes and current understanding |
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| Authors: | Elisa Sacchi Jean-Luc Michelot Helmut Pitsch Philippe Lalieux Jean-François Aranyossy |
| Institution: | Dipartimento di Scienze Mineralogiche e Petrologiche, Università di Torino, Via Valperga Caluso 35, 10125 Torino, Italy, Laboratoire d'Hydrologie et de Géochimie Isotopique, CNRS UMR "OrsayTerre", Université de Paris-Sud, Bat. 504, 91405 Orsay Cedex, France, Commissariat à l'énergie Atomique, DCC/DESD/SESD/LIRE, Saclay Bat. 405, 91191 Gif-sur-Yvette, France, OECD Nuclear Energy Agency, Radioactive Waste Management Division, La Seine St-Germain, 12 Boulevard des ?les, 92130 Issy-les-Moulineaux, France, ANDRA, Agence Nationale pour la Gestion des Déchêts Radioactifs, Parc de la Croix Blanche, 1–7 Rue Jean Monnet, 92298 Chatenay-Malabry Cedex, France, |
| Abstract: | This paper summarises the results of a comprehensive critical review, initiated by the OECD/NEA "Clay Club," of the extraction techniques available to obtain water and solutes from argillaceous rocks. The paper focuses on the mechanisms involved in the extraction processes, the consequences on the isotopic and chemical composition of the extracted pore water and the attempts made to reconstruct its original composition. Finally, it provides some examples of reliable techniques and information, as a function of the purpose of the geochemical study. Electronic Publication |
| Keywords: | pore-water clay– water interaction waste disposal laboratory experiments/measurements confining units |
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