A groundbreaking text and professional resource on natural attenuation technologyNatural attenuation is rapidly becoming a widely used approach to manage groundwater and soil contamination by hazardous substances in petroleum-product releases and leachate from hazardous waste sites and landfills. This book provides, under one cover, the current methodologies needed by groundwater scientists and engineers in their efforts to evaluate subsurface contamination problems, to estimate risk to human health and ecosystems through mathematical models, and to design and formulate appropriate remediation strategies.Incorporating the authors' extensive backgrounds as educators, researchers, and consultants in environmental biotechnology and hydrogeology, the text emphasizes new concepts and recent advances in the science, including:* Quantification of the role of microbes in natural attenuation* Biodegradation and chemical transformation principles* Immobilization and phase change* Biotransformation mechanisms* Groundwater flow and contaminant transport* Analytical models for contaminant transport and reaction processes* Numerical modeling of contaminant transport, transformation, and degradationDetailed descriptions of fundamental processes, characterization approaches, and analytical and numerical methods tied to relevant real-world applications make Bioremediation and Natural Attenuation: Process Fundamentals and Mathematical Models both a timely course text in hydrogeology and environmental engineering and a valuable reference for anyone in the groundwater or risk assessment professions.

Preface.1. Introduction to Bioremediation.2. Geochemical Attenuation Mechanisms.3. Biodegradation Principles.4. Fundamentals of Ground Water Flow and Contaminant Transport Processes.5. Fate and Transport Equations and Analytical Models for Natural Attenuation.6. Numerical Modeling of Contaminant Transport, Transformation, and Degradation Processes.7. Field and Laboratory Techniques to Determine Site-Specific Parameters for Modeling the Fate and Transport of Groundwater Pollutants.8. Bioremediation Technologies.9. Performance Assessment and Demonstration of Bioremediation and Natural Attenuation.Appendix A: Chemical Properties of Various Compounds.Appendix B: Free Energy and Thermodynamic Feasibility of Chemical and Biochemical Reactions.Appendix C: Commonly Used Numerical Groundwater Flow and Solute Transport Codes (Modified after Wiedemeier et al., 1999).Appendix D: Nonparametric Statistical Tests for Determining the Effectiveness of Natural Attenuation (after Wisconsin Department of Natural Resources).Appendix E: Critical Values of the Student t-Distribution.Glossary.Index.