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 Modeling the Transport of Volatile Organic Chemicals in Variably Saturated Subsurface Regions written by Teresa Birnbaum Culver and published by . This book was released on 1989 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Volatile Organic Compounds in the Environment written by Wun-cheng Wang and published by ASTM International. This book was released on 1996 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers delivered at the symposium of the same name, April 1994, by speakers from seven nations. Twenty presentations are arranged under six topics: regulation and assessment, air quality, environmental fate, environmental measurement, environmental monitoring, and control and remediation. A sampling
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 26 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 Assessing the Mobility of Chemicals in the Vadose Zone written by Donn Louis Marrin and published by . This book was released on 1991 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Study of Volatile Organic Compound Partitioning Vapor aqueous soil written by Alan Dole Hewitt and published by . This book was released on 1998 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vadose Zone Hydrology written by Marc B. Parlange and published by Oxford University Press, USA. This book was released on 1999 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vadose zone is the region between ground level and the upper limits of soil fully saturated with water. Hydrology in the zone is complex: nonlinear physical, chemical, and biological interactions all affect the transfer of heat, mass, and momentum between the atmosphere and the water table. This book takes an interdisciplinary approach to vadose zone hydrology, bringing together insights from soil science, hydrology, biology, chemistry, physics, and instrumentation design. The chapters present state-of-the-art research, focusing on new frontiers in theory, experiment, and management of soils. The collection addresses the full range of processes, from the pore-scale to field and landscape scales.
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 Handbook of Vadose Zone Characterization Monitoring written by L. Gray Wilson and published by Routledge. This book was released on 2018-05-02 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written in a simple, straightforward manner without complicated mathematical derivatives. Compiled by experienced practitioners, this guide covers topics such as basic principles of vadose zone hydrology and prevalent monitoring techniques. Case studies present actual field experiences for the benefit of the reader. The Handbook provides practitioners with the information they need to fully understand the principles, advantages, and limitations of the monitoring techniques that are available. The Handbook of Vadose Zone Characterization & Monitoring expands and consolidates the useful and succint information contained in various ASTM documents, EPA manuals, and other similar texts on the subject, making it an invaluable aid to new practioners and a useful reference for seasoned veterans in the field.
Download or read book Solvent Microextraction written by John M Kokosa and published by John Wiley & Sons. This book was released on 2009-10-05 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers both a practical as well a theoretical approach to Solvent Microextraction (SME) and will help analytical chemists to evaluate SME for a given sample preparation. Introductory chapters overview a comparison of SME with other sample preparation methods, a summary of the technical aspects, and a detailed theoretical treatment of SME. The book then describes the practical aspects of the technique, with detailed “how to” chapters devoted to the preparation and analysis of atmospheric, solid and liquid environmental, clinical and industrial samples. This text will serve as both a handy laboratory desk-reference and an indispensible instructional tool.
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 Contaminant Hydrogeology written by C. W. Fetter and published by Waveland Press. This book was released on 2017-10-24 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tremendous progress has been made in the field of remediation technologies since the second edition of Contaminant Hydrogeology was published two decades ago, and its content is more important than ever. Recognizing the extensive advancement and research taking place around the world, the authors have embraced and worked from a larger global perspective. Boving and Kreamer incorporate environmental innovation in studying and treating groundwater/soil contamination and the transport of those contaminants while building on Fetter’s original foundational work. Thoroughly updated, expanded, and reorganized, the new edition presents a wealth of new material, including new discussions of emerging and potential contaminant sources and their characteristics like deep well injection, fracking fluids, and in situ leach mining. New sections cover BET and Polanyi adsorption potential theory, vapor transport theory, the introduction of the Capillary and Bond Numbers, the partitioning interwell tracer testing technique for investigating NAPL sites, aerial photographic interpretation, geophysics, immunological surveys, high resolution vertical sampling, flexible liner systems, groundwater tracers, and much more. Contaminant Hydrogeology is intended as a textbook in upper level courses in mass transport and contaminant hydrogeology, and remains a valuable resource for professionals in both the public and private sectors.
Download or read book Processes Govering the Fate and Transport of Volatile Compounds VOCs from the Vadose Zone to Indoor Air written by Inán Liviano Lama and published by . This book was released on 2007 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biotechnology in Industrial Waste Treatment and Bioremediation written by Gretchen Smith and published by CRC Press. This book was released on 2020-10-28 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biotechnology in Industrial Waste Treatment and Bioremediation addresses the increasingly important topic of waste treatment. Focusing on microbiological degradation of contaminants, it offers a representative picture of the current status of environmental biotechnology and lays a solid foundation of the methods and applications of bioremediation. The expert presentations of case studies in this new book demonstrate successful treatment schemes and technologies meeting regulatory standards. These case studies represent an international cross-section of strategies for developing and implementing the evolving technologies of bioremediation. Biotechnology in Industrial Waste Treatment and Bioremediation examines the primary waste streams, including air, water, soils, and sediments, and explores specific treatment methodologies for industrial and environmental contaminants. This broad and unique coverage allows treatment firms and regulatory authorities to determine and develop appropriate treatment strategies for site-specific problems of waste remediation. The observations and successful field applications compiled in Biotechnology in Industrial Waste Treatment and Bioremediation make it an excellent reference for understanding, evaluating, developing, and operating efficient and cost-effective full-scale treatment systems.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Agricultural Food and Biological Engineering written by Dennis R. Heldman and published by CRC Press. This book was released on 2010-10-21 with total page 2001 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examining the role of engineering in delivery of quality consumer products, this expansive resource covers the development and design of procedures, equipment, and systems utilized in the production and conversion of raw materials into food and nonfood consumer goods. With nearly 2000 photographs, figures, tables, and equations including 128 color figures the book emphasizes and illustrates the various engineering processes associated with the production of materials with agricultural origin. With contributions from more than 350 experts and featuring more than 200 entries and 3600 references, this is the largest and most comprehensive guide on raw production technology.
Download or read book Geoenvironmental Engineering written by Raymond Nen Yong and published by Thomas Telford. This book was released on 1997 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the world there is an ever increasing awareness of the importance of environmental issues. Pollution of the natural environment is welfare. Nevertheless, economic stability and prosperity necessitate the continuation of such activities and society faces the challenge of minimising the resulting adverse effects. This substantial volume is the proceedings of the British Geotechnical Society's major conference for geo-environmental engineering of contaminated land.
