Groundwater and Subsurface Remediation

The book illustrates the role of large-scale experiments in groundwater and subsurface remediation research. The optimization of existing techniques and the development of new approaches for in-situ remediation of contaminated aquifers and soils is a challenging multidisciplinary task.
The book covers the spectrum from basic process research to technology experiments and numerical systems simulation as well as various aspects of processes for extraction, decomposition and immobilization of contaminants. The authors are internationally leading scientists from key institutions in subsurface remediation research in the USA, Canada, France, The Netherlands and Germany. Fachgebiet: Environmental Engineering Zielgruppe: Research and Development

Texte du rabat

The complex topic of in-situ subsurface remediation technologies has been ad­ dressed at an international symposium at the Universitat Stuttgart on September 26 and 27, 1995, on the occasion of the inauguration of the research facility VEGAS (Versuchseinrichtung zur Grundwasser- und Altlastensanierung). The results are contained in this book with 22 contributions from leading experts in the field from Europe and North America. The book illustrates the role of large-scale experiments in groundwater and subsurface remediation research. The subtopics address the various links between conventional laboratory experiments, technology-scale experiments and field-site studies, showing the contribution of large-scale experiments to bridging the gap between small-scale investigations and large-scale field investigations (upscaling). The interdisciplinary nature of the problems requires a multidisciplinary approach. Therefore, the idea has been followed to bring together the various disciplines in­ volved in the different aspects and facets of subsurface flow, transport and trans­ as hydraulics and hydrology, physics, formation, involving such diverse disciplines chemistry, microbiology, geology, industrial, chemical and hydraulic engineering, mathematics and hydroinformatics. The individual contributions from these di­ versified fields address the subject from different angles in an attempt to form a coherent picture of the various aspects of the complex problems of subsurface remediation. The focus is on research approaches and strategies with respect to the development of new and improved technologies and to the role of large-scale experiments in research and application.

Contenu

The Role of Large-Scale Experiments in Groundwater and Subsurface Remediation Research: The VEGAS Concept and Approach.- From Concepts to Quantification: Experiments.- The Hierarchical Organization of Experiments, a Leading Approach in Engineering Science.- Basic Knowledge and Perspectives on Biodegradation of Xenobiotic Compounds in Soil.- Quantifying Rates of Biodegradation in Contaminated Aquifers.- Heterogeneity of Soils and its Role in Solute Transport.- Visualization Experiments at the Pore Scale.- From Processes to Technologies: Interactions and Scales.- The Borden Site for Groundwater Contamination Experiments: 1978-1995.- The VEGAS Research Facility: Technical Equipment and Research Projects.- Metal-Enhanced Degradation of Halocarbons: Technology Development and Implementation.- Research Centre SFB 188 "Treatment of Contaminated Soils" - Examples from Investigations in the Field of Biological Soil Treatment.- Effective Parameters, Effective Processes: From Porous Flow Physics to In Situ Remediation Technology.- Regional Scales of Groundwater Quality Parameters and their Dependence on Geology and Land Use.- From Processes to Systems: Numerical Models.- From Processes to Systems: A Discussion of Predictive Modelling of Flow and Transport in Geologic Systems.- Predictive Modelling of Multicomponent Reactive Transport in Mining-affected Acidic Groundwater Environments.- Coupling Chemical Reactors with Particle Tracking Transport Models.- Problems and Issues of Constitutive Relationships Needed for Accurate Modelling of Multiphase Flow in Heterogenous Porous Media.- Surfactant Enhanced Dissolution of Pooled DNAPL: Numerical Modelling and Parameter Identification.- From Technology to Application: Strategies.- Safeguards and Remedies - A Basis for Decisions on Major Projects in Eastern Germany, and for their Realisation.- Public and Private Initiatives to Develop Ground Water Remediation Technologies in the U.S..- Decontamination of Abandoned Hazardous Sites in the City of Düsseldorf.- In Situ Bioremediation of Chloroethene Contaminated Soil.- Groundwater Protection and Water Supply - Concept and Major Results of a Technology Assessment Project Carried out on Behalf of the German Bundestag.- List of Authors.