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A Conceptual Model of Field Behavior of Air Sparging and Its Implications for Application
Authors:David P Ahlfeld  Amine Dahmani  Wei Ji
Institution:David P. Ahlfeld;is an associate professor in the Department of Civil Engineering at the University of Connecticut (Box U-37, Dept. of Civil Engineering, The University of Connecticut, Storrs, CT 06269). He holds a Ph.D. in civil engineering from Princeton University. His research interests include ground water modeling and remediation. Amine Dahmani;is engineering project manager in the Environmental Research Institute at the University of Connecticut (Box U-210, Environmental Research Institute, The University of Connecticut, Storrs, CT 06269). He holds a Ph.D. in petroleum engineering from Louisiana State University. His primary research activities are in soil contamination characterization, leaching potential of pollutants, and innovative ground water remediation technologies. Wei Ji;is a Ph.D. student in the Department of Civil Engineering at the University of Connecticut (Box U-37, Dept. of Civil Engineering, The University of Connecticut, Storrs, CT 06269). He has a B.S. in fluid mechanics and an M.S. in computational mathematics from Peking University, China. His research interests include fundamental studies of conceptual models, modeling of multiphase fluid flow, and ground water contaminant transport.
Abstract:The basic physics of air flow through saturated porous media are reviewed and implications arc drawn for the practical application of air sparging. A conceptual model of the detailed behavior of an air sparging system is constructed using elements of multiphase flow theory and the results of recent experimental work. Implications of the conceptual model on air sparging topics are discussed. The meaning of radius of influence in the context of air sparging is found to be ambiguous. The hydrodynamic effects of air sparging such as mounding of ground water and flow impedance are explored. Limitations on rates of remediation and operational strategics for improving sparging effectiveness are examined.
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