M. Yavuz Corapcioglu's Advances in Porous Media, Vol. 3 PDF

By M. Yavuz Corapcioglu

ISBN-10: 0444825002

ISBN-13: 9780444825001

This ebook is the 3rd quantity of a sequence: ''Advances in Porous Media''. Our goal is to offer in-depth evaluation papers that supply accomplished assurance to the sector of shipping in porous media. This sequence treats shipping phenomena in porous media as an interdisciplinary subject. hence, ''Advances in Porous Media'' will proceed to advertise the extension of ideas and functions in a single region to others, slicing throughout conventional limitations. the target of every bankruptcy is to study the paintings performed on a selected subject together with theoretical, numerical in addition to experimental reviews. The participants of this quantity, as for past ones, come from a number of backgrounds: civil and environmental engineering, and earth and environmental sciences. The articles are aimed toward all scientists and engineers in a variety of varied fields concerned about the basics and functions of techniques in porous media.

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In the interior of the plume, anaerobic conditions predominate and electron acceptors other than oxygen must be used by the microorganisms. Microorganisms in the saturated zone are likely to exist as small colonies. These colonies may be the result of cell division and agglomeration due to extracellular polymers or may be communities of synergistic organisms. Because of the sparing solubility of most typical NAPL contaminants, the colonies are likely to be relatively thin, so that the contaminant concentrations within the colony are the same throughout and perhaps the same as the substrate concentrations dissolved in the bulk aqueous phase.

Therefore, as in the vadose zone, a fringe of aerobic activity develops at the edge of the contaminant plume. In the interior of the plume, anaerobic conditions predominate and electron acceptors other than oxygen must be used by the microorganisms. Microorganisms in the saturated zone are likely to exist as small colonies. These colonies may be the result of cell division and agglomeration due to extracellular polymers or may be communities of synergistic organisms. Because of the sparing solubility of most typical NAPL contaminants, the colonies are likely to be relatively thin, so that the contaminant concentrations within the colony are the same throughout and perhaps the same as the substrate concentrations dissolved in the bulk aqueous phase.

In general, dispersivities tend to increase as solute travel distances increase. The variabiUty in dispersivity causes compUcations in solute transport modeling. All of the solute transport models reviewed in this study used a constant hydrodynamic dispersion coefficient to account for diffusion and dispersion. Diffusion of solutes is practically negUgible for most saturated aquifers, and Modeling subsurface biodegradation 23 mechanical dispersion is usually the dominant cause of solute front spreading.

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Advances in Porous Media, Vol. 3 by M. Yavuz Corapcioglu


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