Download or read book Transport and Transformations of Volatile Organic Chemicals in Unsaturated Soils written by Yan Jin and published by . This book was released on 1994 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coupling Transport and Biodegradation of Volatile Organic Compounds in Unsaturated Soils written by Yassar Hamad El-Farhan and published by . This book was released on 1997 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transport of Dissolved Volatile Organic Compounds in the Unsaturated Zone written by Munjed A. Maraqa and published by . This book was released on 1995 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Transport of Volatile Organic Chemicals in Unsaturated Soil and Their Removal by Vapor Extraction written by John S. Gierke and published by . This book was released on 1990 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reactions and Movement of Organic Chemicals in Soils written by B. L. Sawhney and published by . This book was released on 1989 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical considerations of the partition uptake of nonionic organic compounds by soil organic matter. The sorption of nonpolar organics by soils and sediments. Sorption dynamics of organic compounds in soils and sediments. Adsorption and reactions of selected organic molecules on clay mineral surfaces. Effect of sunlight on organic contaminants at the atmosphere-soil interface. Dehalogenation of pesticides by anaerobic microorganisms in soils and groundwater: a review. Volatilization of pesticides from soil. Chlorophenols in soils. Hydrolytic transformations of organic chemicals in the environment. Kinetics of biodegradation in soil. Overview of organic chemical environmental fate and transport modeling approaches. Organic chemical movement over and through soil. Environmental behavior of aquatic herbicides in sediments. Transport processes involving organic chemicals. Movement of volatile organic chemicals in soils. Nonequilibrium transport of organic contaminants in groundwater. Hydrologic processes affecting the movement of organic chemicals in soils. Movement of organic chemicals through landfills and hazardous waste disposal sites.
Download or read book Coupled Processes Diffusive Transport and Biodegradation of Volatile Organic Compounds in Unsaturated Porous Media written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusive transport of volatile organic compounds (VOCs) and their degradation by bacteria in unsaturated soils are coupled by poorly understood mass transfer kinetics at the gas/water interface. The capability to predict the fate of VOCs in m saturated soil is necessary to evaluate the feasibility of natural attenuation as a VOC remediation strategy. The objective of this study was to develop a mechanistically based mathematical model that considered the interdependence of VOC diffusive transport, mass transfer at the gas/water interface, microbial activity, and sorptive interactions in a moist, unsaturated soil. Because the focus of the model was on description of natural attenuation, the advective VOC transport that is induced in engineered remediation processes such as vapor extraction was not considered. The utility of the model was assessed through its ability to describe experimental observations from well-defined experiments in which toluene was used as a representative VOC and diffused through soil columns that contained a toluene degrading bacterium, Pseudomonasputida. The coefficient for gas-liquid mass-transfer, KLa, was found to be a key parameter controlling the ability of bacteria to degrade VOCs. This finding indicates that soil size and geometry are likely to be dominant parameters in assessing the possible success of natural attenuation of VOCs in contaminated unsaturated soils.
Download or read book Fate of Volatile Organic Chemicals VOCs in Unsaturated Soil Surrounding a Drainfield in a Soil Absorption System written by Patricia Ann Sauer and published by . This book was released on 1991 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Numerical Solution to Three dimensional Multiphase Transport of Volatile Organic Compounds in Unsaturated Soils with an Application to the Remedial Method of In situ Volatilization Part I written by and published by . This book was released on 1992 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part I of this paper presents the development and application of a numerical model for determining the fate and transport of volatile organic compounds (VOCS) in the unsaturated zone resulting from forced volatilization and gaseous advection-dispersion of organic vapor in a multipartitioned three-dimensional environment. The model allows for single-component transport in the gas and water phases. The hydrocarbon is assumed to be in specific retention and, therefore, immobile. Partitioning of the hydrocarbon between the oil, water, gas, and soil is developed as rate-limited functions that are incorporated into sink/source terms in the transport equations. The code for the model was developed specifically to investigate in-situ volatilization (ISV) remedial strategies, predict the extent of cleanup from information obtained at a limited number of measurement locations, and to help design ISV remedial systems. Application of the model is demonstrated for a hypothetical one-dimensional ISV system. Part II of this paper will present the analysis of an existing ISV system using the full three-dimensional capability of the model.
Download or read book A Numerical Solution to Three dimensional Multiphase Transport of Volatile Organic Compounds in Unsaturated Soils with Application to the Remedial Method of In situ Volatilization written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transport and Fate of Volatile Organic Chemicals in Soils written by Lis Wollesen Petersen and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elucidation of Retention Processes Governing the Transport of Volatile Organic Compounds in Unsaturated Soils PHD written by Molly Susan Costanza and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multicomponent Gas phase Transport of Volatile Organic Chemicals in Soils written by Said Amali and published by . This book was released on 1994 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mass Transport of Volatile Organic Compounds Between the Saturated and Vadose Zones written by Monte S. Harner and published by . This book was released on 1996-12-01 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volatile organic compounds (VOCs) dissolved in the saturated zone are transported into the vadose zone primarily by gaseous phase diffusion. If the saturated zone is remediated, VOCs present in the vadose zone may become a secondary source of contamination for the groundwater The amount of VOCs that remain in the vadose zone is dependent on site hydrology, soil properties, and the chemical properties of the contaminants. The purpose of this study was to determine what conditions caused VOC concentrations in the vadose zone to significantly recontaminate the saturated zone. A one-dimensional numerical model was developed to investigate the transport of a VOC, trichioroethylene, between the saturated and vadose zones under a variety of conditions. The model featured steady-state unsaturated water flow and transient contaminant transport Transport mechanisms included aqueous phase advection-dispersion and gaseous phase diffusion. Partitioning between the water, gas, and soil compartments were modeled as equilibrium processes. Sensitivity analyses were performed on several variables including soil type (homogeneous and heterogeneous profiles), water infiltration rate and vadose zone depth. Results indicated that recontamination was most significant rate, and vadose zone depth. Results indicated that recontamination was most significant in the presence of heterogeneous soils, low infiltration rates and deep vadose zones.
Download or read book The Behavior of Selected Volatile Organic Compounds in Unsaturated Soils and Media written by Jerold Scott Teeter and published by . This book was released on 1994 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior and Determination of Volatile Organic Compunds in Soil written by Marti Minnich and published by . This book was released on 1993 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Transport of Volatile Organic Chemicals in Unsaturated Media written by Lawrence C. Krause and published by . This book was released on 1987 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transport and Adsorption of Volatile Organic Compounds in Low Water Content Soils written by Ming Yu and published by . This book was released on 1996 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
