Porewater Extraction from Argillaceous Rocks for Geochemical Characterisation
Subtitle: Methods and Interpretations
By: Organisation for Economic Co-operation and Development and Nuclear Energy Agency
Contributors: Nuclear Energy Agency
Series: Radioactive waste management; Radioactive Waste Management
Publisher: OECD Publishing
Published: 2000
Place of publication: Paris
Language: eng
Format: [electronic resource]:
Number of pages: 188
ISBN-13: 9789264182462
Subjects: Nuclear energy
Description: The definition of the chemical and isotopic composition of the groundwater present in argillaceous formations, which are considered as potential host rocks for radioactive waste disposal, is crucial for establishing their barrier properties. Therefore, a critical review of the relevant literature on the current methods applied to extract water and solutes and on the various approaches to the interpretation of their results was commissioned to the Laboratoire d’hydrologie et de géochimie isotopique (Université de Paris-Sud, France). The present document provides a synthesis of available extraction methods, assesses their respective advantages and limitations, identifies key processes that may influence the composition of the extracted water, describes modelling approaches that are used to determine in situ porewater composition, and highlights, wherever possible, some of the unresolved issues and recommendations on ways to address them.
Table of contents: title: Foreword; title: Acknowledgements; title: Executive Summary; title: Preface - Scope, Objectives, and Limits of the Study; title: Part 1. Introduction to the Clay-Water System; title: 1. Clay Minerals; title: 2. Interactions Between Water, Solutes, and Clay; title: 3. Porosity, Salinity, and Hydration; title: 4. Organic Matter; title: 5. Clay Environments of Interest for the Present Study; title: Part II - Experimental Methods; title: 1. Field Techniques for Fluid Extraction and Characterisation; title: 2. Rock Sampling, Storage, and Preservation; title: 3. On Sample Laboratory Techniques; title: Part III - Processes and Current Interpretations; title: 1. Extraction Techniques; title: 2. Geochemical Modelling; title: 3. Indirect Approach to Porewater Composition Using Geochemical Modelling; title: 4. Conclusions, Recommendations, and Topics for Further Investigation; title: Glosary and Frequently Used Abbreviations; title: References