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Chromate reduction and immobilization under high pH and high ionic strength conditions.He, Yongtian, January 2003 (has links)
Thesis (Ph. D.)--Ohio State University, 2003. / Title from first page of PDF file. Document formatted into pages; contains xix, 219 p.: ill. (some col.). Includes abstract and vita. Advisor: Samuel J. Traina, Environmental Science Graduate Program. Includes bibliographical references (p. 201-219).
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Uranium contamination of vadose zone sediments from the Hanford U single shell tank farmWilliams, Benjamin Deeter. January 2009 (has links) (PDF)
Thesis (M.S. in environmental science)--Washington State University, December 2009. / Title from PDF title page (viewed on Jan. 26, 2010). "School of Earth and Environmental Sciences." Includes bibliographical references (p. 48-51).
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The use of carbonation and fractional evaporative crystallization in the pretreatment of Hanford nuclear wastesDumont, George Pierre, Jr. January 2007 (has links)
Thesis (M. S.)--Chemical Engineering, Georgia Institute of Technology, 2007. / Committee Chair: Dr. Ronald W. Rousseau; Committee Member: Dr. Amyn S, Teja; Committee Member: Dr. Wm. James Frederick Jr.
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Establishment of concentration ratios for riparian and shrub steppe areas of the eastern Washington Columbia basinNapier, Jonathan Bamberger 12 September 2012 (has links)
Concentration ratios are used to determine the transfer of nuclides from soil to biota to fauna. Some nuclides have limited associated data though, this has not prevented predictions from being performed at sites without associated data. These ratios are site specific and are not fully applicable when applied to other locations. A recent literature review for a waste repository performance assessment determined that a significant portion of the environmental data was based on recursively published material. To address this deficiency neutron activation analysis (NAA) was used to determine concentration ratios of certain biota. Three sites, two riparian and one shrub steppe, were sampled in the eastern Washington Columbia basin, near the Hanford site. Two hundred and fifty eight samples of opportunity were collected. This included 15 soil samples, 10 water and sediment samples, 40 different species of biota, and 2 terrestrial animal species and 3 aquatic animal species. These samples were prepared for NAA by drying, weighing, and in certain cases ashing to improve detection efficiency. After activation, the samples were placed in a HPGe detector to perform spectral analysis. The concentration results of 26 elements of interest are presented, along with newly established concentration ratios for all of the species sampled. / Graduation date: 2013
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An evaluation of an ion-exchange method for the removal of technetium-99 from groundwaterElliott, Wanda Sue, January 2007 (has links) (PDF)
Thesis (M.S. in environmental Science)--Washington State University, December 2007. / Includes bibliographical references (p. 27).
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The Hanford Laboratories and the growth of environmental research in the Pacific Northwest, 1943 to 1965Ellis, D. Erik 17 December 2002 (has links)
The scientific endeavors that took place at Hanford Engineer Works, beginning in World
War II and continuing thereafter, are often overlooked in the literature on the Manhattan
Project, the Atomic Energy Commission, and in regional histories. To historians of
science, Hanford is described as an industrial facility that illustrates the perceived
differences between academic scientists on the one hand and industrial scientists and
engineers on the other. To historians of the West such as Gerald Nash, Richard White,
and Patricia Limerick, Hanford has functioned as an example of the West's
transformation during in World War II, the role of science in this transformation, and the
recurring impacts of industrialization on the western landscape. This thesis describes the
establishment and gradual expansion of a multi-disciplinary research program at
Hanford whose purpose was to assess and manage the biological and environmental
effects of plutonium production. By drawing attention to biological research, an area in
which Hanford scientists gained distinction by the mid 1950s, this study explains the
relative obscurity of Hanford's scientific research in relation to the prominent, physics-dominated
national laboratories of the Atomic Energy Commission. By the mid 1960s,
with growing public concern over radiation exposure and changes in the government's
funding patterns for science, Hanford's ecologically relevant research provided a
recognizable and valuable identity for the newly independent, regionally-based research
laboratory. With funding shifts favoring the biological and environmental sciences in the
latter half of the twentieth-century, Hanford scientists were well prepared to take
advantage of expanding opportunities to carve out a permanent niche on the border of
American science. / Graduation date: 2003
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Physiochemical mechanisms for the transport and retention of technetiumJansik, Danielle P. 14 February 2014 (has links)
Understanding the transport and retention of radionuclides in the environment is important for protecting freshwater supplies and minimizing impact to biologic systems. Technetium-99 (Tc⁹⁹) is a radionuclide of interest due to its long half-life (2.13 x 10⁵ years) and toxicity. In the form of pertechnetate (TcO₄⁻), Tc is expected to move nearly unretarded in the subsurface. Under reducing conditions Tc can precipitate in low solubility Tc oxide (TcO₂·nH₂O) and/or Tc sulfide (Tc₂S[subscript x]) phases.
The studies presented in this dissertation investigate the physiochemical mechanisms for the transport and retention of Tc. Transport studies determined that TcO₄⁻ would move at pore water velocity in unsaturated sediments. Geochemical studies of contaminated sediments determined that nearly ~ 25 % of the total Tc was retained in phases associated with iron oxide and aluminosilicate minerals, thus reducing the mobility of Tc. Studies of Tc₂S[subscript x] mineral phases, generated using nano Zero Valent Iron (nZVI) and sulfide (HS-) in sediments, determined that Tc could be stabilized in mineral phases as Tc₂S[subscript x] that were slower to reoxidize than TcO₂·nH₂O phases. / Graduation date: 2013 / Access restricted to the OSU Community at author's request from Feb. 14, 2013 - Feb. 14, 2014
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Wanapum Overview and Perspectives Developed During Tribal Narrative WorkshopThe Wanapum Tribe, Stoffle, Richard, Arnold, Richard 06 1900 (has links)
The Greater than Class C (GTCC) Environmental Impact Statement (EIS) evaluated the potential impacts from the construction and operation of a new facility or facilities, or use of an existing facility, employing various disposal methods (geologic repository, intermediate depth borehole, enhanced near surface trench, and above grade vault) at six federal sites and generic commercial locations. For three of the locations being considered as possible locations, consulting tribes were brought in to comment on their perceptions on how GTCC low level radioactive waste would affect Native American resources (land, water, air, plants, animals, archaeology, etc.) short and long term. The consulting tribes produced essays that were incorporated into the EIS and these essays are in turn included in this collection. This essay was produced by the Wanapum Tribe for the Hanford Site.
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Decomposition mechanisms related to Hanford waste: characterization of NO¯ from organic nitroxyl derivativesBelcher, Marcus Anthony 08 1900 (has links)
No description available.
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Effect of moisture content on the desorption of carbon tetrachloride from Hanford siltSaldanha, Sachin Mervin. January 2009 (has links) (PDF)
Thesis (M.S. in environmental engineering)--Washington State University, May 2009. / Title from PDF title page (viewed on June 19, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 58-61).
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