Download or read book Using Trees to Remediate Tritium Contaminated Groundwater written by Karin Theodora Rebel and published by . This book was released on 2005 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Using Trees to Remediate Groundwaters Contaminated with Chlorinated Hydrocarbons 1998 Annual Progress Report written by and published by . This book was released on 1998 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial practices in the past have resulted in contamination of groundwater with chlorinated hydrocarbons (CHCs) at many DOE sites, such as Hanford and Savannah River. Such contamination is a major problem because existing groundwater remediation technologies are expensive and difficult. An inexpensive method for groundwater remediation is greatly needed. Trees could be used to remediate CHC polluted groundwater at minimal cost (phytoremediation). Before phytoremediation can be extensively applied, the authors must determine the range of compounds that are attacked, the effects of metabolic products on the plants and the environment, and the effect of transpiration and concentration of CHC on uptake and metabolism. They will test the ability of hybrid poplar to take up and transform the chlorinated methanes, ethanes and ethylenes. The rate of uptake and transformation by poplar of TCE as a function of concentration in the soil, transpiration rate and illumination level will be determined. Methods will be developed to permit rapid testing of plants from contaminated sites for species able to oxidize and sequester chlorinated compounds. They will identify the nature of the bound residues of TCE metabolism in poplar. They will identify the mechanisms involved in CHC oxidation in poplar and use genetic manipulations to enhance that activity. They will introduce the genes for mammalian cytochrome P-450-IIE1, known to oxidize light CHCs such as TCE to attempt to increase the CHC metabolism capacity of poplar. The results of this research will place phytoremediation of CHCs on a firm scientific footing, allowing a rational assessment of its application to groundwater contamination. This report summarizes the results of the first 1.5 years of work on a three-year project.
Download or read book Reconstruction of Tritium Release History from Contaminated Ground Water Using Tree Ring Analysis written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rapid Assessment of Soil and Groundwater Tritium by Vegetation Sampling written by and published by . This book was released on 1995 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rapid and relatively inexpensive technique for defining the extent of groundwater contamination by tritium has been investigated. The technique uses existing vegetation to sample the groundwater. Water taken up by deep rooted trees is collected by enclosing tree branches in clear plastic bags. Water evaporated from the leaves condenses on the inner surface of the bag. The water is removed from the bag with a syringe. The bags can be sampled many times. Tritium in the water is detected by liquid scintillation counting. The water collected in the bags has no color and counts as well as distilled water reference samples. The technique was used in an area of known tritium contamination and proved to be useful in defining the extent of tritium contamination.
Download or read book An Investigation of the Relationship Between Tritium in Groundwater and the Dendrochronology of Tritium in Trees at the Savannah River Site written by and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Relationship Between Tritium in Groundwater and the Dendrochronology of Tritium in Trees at the Savannah River Site Final Report written by and published by . This book was released on 1995 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was supported through ERDA to demonstrate that the temporal distribution of tritium can be documented by the analysis of bound hydrogen in annual tree-ring samples. The project focuses on two sample locations at the Savannah River Site (SRS), a nuclear material production facility located in Aiken, SC. The SRS provided samples of cross-sections from a single tree that were to be pooled together for analysis. Annual tree-rings were identified in each cross-section sample and separated for the period 1954 to 1993. These annual samples were ground and chemically treated to separate the hollocellulose fraction of the wood, then subsequently combusted and the resulting water counting using low-level liquid scintillation counting equipment. Additionally, the ground annual tree-rings were gamma-counted to determine any temporal variation in radionuclide activity and analyzed with x-ray fluorescence to find any temporal variation in trace-element concentrations. This report presents the results and is intended to be a compilation of the work.
Download or read book Introduction to Phytoremediation of Contaminated Groundwater written by James E. Landmeyer and published by Springer Science & Business Media. This book was released on 2011-09-18 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the reader with the comprehensive view necessary to understand and critically evaluate the design, implementation, and monitoring of phytoremediation at sites characterized by contaminated groundwater. Part I presents the historical foundation of the interaction between plants and groundwater, introduces fundamental groundwater concepts for plant physiologists, and introduces basic plant physiology for hydrogeologists. Part II presents information on how to assess, design, implement, and monitor phytoremediation projects for hydrologic control. Part III presents how plants take up and detoxify a wide range of organic xenobiotics in contaminated groundwater systems, and provides various approaches on how this can be assessed and monitored. Throughout, concepts are emphasized with numerous case studies, illustrations and pertinent literature citations.
Download or read book Phytoremediation written by Mary Therese Cooke and published by . This book was released on 1999 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relationship Between Tree Core and Groundwater Trichloroethylene Concentrations for Groundwater Plume Delineation written by Kerry L. Lewis and published by . This book was released on 2001-02-01 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 17-month field study designed to evaluate the feasibility of using trees as a cost-effective groundwater sampling and plume delineation tool was recently completed at site Operable Unit 4 at Hill Air Force Base (Ogden, UT). Using a hand-driven incremental borer, tree-core samples were collected monthly from cottonwood (Populus deltoides), russian olive (Elaeagnaceae elaeagnus), poplar (Salicaceae populus), apple (Malus pumila), and box elder (Acer negundo) trees located within and outside a trichloroethylene (TCE)-contaminated shallow groundwater plume. Concentrations of TCE in the core samples were determined using a headspace gas chromatography procedure. Variations to the headspace analysis method were made and results compared to other methods of TCE measurement for performance comparison. A relationship * between tree core (0. 001 to 32 mg/kg) and groundwater (0.2 to 4890 mg/L) TCE concentrations was observed (e.g., trees located above areas of high groundwater TCE concentration were found to contain high TCE concentrations). Stable isotopes of hydrogen were used to show that shallow TCE-contaminated groundwater is the most likely source of water used by the trees. Wood sorption isotherms (using site specific trees) were completed using C-14 TCE in a sealed batch process. Wood-water partitioning coefficient (K(sub wood)) values of 16.42 mL/g (cottonwood) and 11.51 mL/g (russian olive) were obtained from linear isotherms. When measuring TCE concentrations in water, these K(sub wood) values can now be used to estimate original concentrations of TCE within the tree tissues. Desorption coefficients were measured through sequential dilution steps and found to be reversible along the sorption isotherm.
Download or read book The Use of Plant transpired Water to Monitor Subsurface Tritium Contamination in Soil Water and Ground Water written by Susan G. Monheit and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remediation Manual for Contaminated Sites written by David L. Russell and published by CRC Press. This book was released on 2024-08-26 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the author’s more than 40 years of experience working on environmental projects, Remediation Manual for Contaminated Sites provides a practical guide to environmental remediation and cleanups. It presents a broad overview of the environmental remediation process, distilled into what one needs to know to evaluate a specific challenge or solve a remediation problem. The text offers guidance on tasks that range from managing consultants and contractors to gathering data, selecting a suitable remediation technology, and calculating remediation costs. This new edition is updated throughout, includes five new chapters, and provides a more global coverage. • This book includes remediation strategies for a variety of contaminants and examines a wide range of technologies for the remediation of water and soil, including excavation, wells, drainage, soil venting, vapor stripping, incineration, bioremediation, containment, solidification, vitrification, and phytoremediation. • Written as a down‐to‐earth reference for professionals faced with the challenges of remediating a contaminated site, this book is also useful as a primer for students and those new to the field. It includes numerous figures, photographs, tables, and helpful checklists. • This new edition adds five all‐new chapters. It presents a more global approach and practical examples from around the world.
Download or read book Nuclear Decommissioning Case Studies Characterization Waste Management Reuse and Recycle written by Michele Laraia and published by Elsevier. This book was released on 2023-07-20 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approx.458 pagesApprox.458 pages
Download or read book An Estimate of the History of Tritium Inventory in Wood Following Irrigation with Tritiated Water written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the groundwater and surface water at the Savannah River Site (SRS) is contaminated with tritium as a legacy of nuclear materials production. An analysis of tritium remediation alternatives suggests that the most practical remediation alternative is to change in the path of tritium exposure to the public. Calculations based on many years of experience at the Savannah River Site indicate that a 40 percent reduction in dose can be achieved by releasing tritiated water to the atmosphere, as water vapor, as opposed to allowing it to flow off site in surface water streams.
Download or read book Energy and Water Development Appropriations for Fiscal Year 2002 written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2002 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 107 1 Hearings Energy And Water Development Appropriations For 2002 Part 6 May 3 2001 written by and published by . This book was released on 2001 with total page 1326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Removal of Tritium from Contaminated Water Using Hollow Fiber Membranes written by Robert Charles Kelso and published by . This book was released on 1994 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
