Modelling the Fate of Oxidisable Organic Contaminants in Groundwater D. A. Barry 1,2 , H. Prommer 2,3 School of Engineering and Electronics, and Contaminated Land Assessment and Remediation Research Centre, The University of Edinburgh, Edinburgh EH9 3JN United Kingdom C. T. Miller 2 Center for the Advanced Study of the Environment, Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina 27599-7400 USA P. Engesgaard 2 Environment and Resources DTU, Technical University of Denmark, Bygningstorvet, Building 115, DK-2800 Kongens Lyngby, Denmark A. Brun 2 DHI Water and Environment, Monitoring and Information Technology Department, Gustav Wieds Vej 10, 8000 ˚ Arhus C, Denmark C. Zheng 2 Department of Geological Sciences The University of Alabama, Tuscaloosa, Alabama 35487 USA Abstract Contamination by organic chemicals is a pervasive environmental problem, suscep- tible to remediation by natural or enhanced attenuation approaches or more highly engineered methods such as pump-and-treat, amongst others. Such remediation approaches, along with risk assessment or the pressing need to address complex scientific questions, have driven the development of integrated modelling tools that incorporate physical, biological and geochemical processes. We provide a comprehensive modelling framework, including geochemical reac- tions and interphase mass transfer processes such as sorption/desorption, NAPL dissolution and mineral precipitatation/dissolution, all of which can be in equi- librium or kinetically controlled. This framework is used to simulate microbially Preprint submitted to Elsevier Preprint 3 June 2002