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Revegetation/rock cover for stabilization of inactive uranium mill tailings disposal sites

Description: Pacific Northwest Laboratory is developing design and performance guidelines for surface stabilization of inactive uranium mill tailings. In this work, vegetation and rock covers are being evaluated for maintaining long-term integrity of impoundment systems. Methods are being developed to estimate erosion rates associated with rock and/or vegetation covers, and to determine the effects of surface treatments on soil moisture. Interactions between surface treatments and barriers (radon and biolog… more
Date: July 1, 1982
Creator: Beedlow, P. A.; McShane, M. C. & Cadwell, L. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulation of the long-term accumulation of radiocontaminants in crop plants

Description: Most radiological dose assessment models ignore the long-term buildup of radiocontaminants in the soil. When they estimate levels in crop plants from root uptake, these models account only for the annual input from the source into the soil. Almost all of the models ignore the build-up of contaminants in the soil profile due to the accumulation in the roots and the build-up from the above-ground plant material that is buried by plowing. The model described in this report simulates the entire sys… more
Date: March 1, 1980
Creator: Schreckhise, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparative plant uptake and microbial degradation of trichloroethylene in the rhizospheres of five plant species-- implications for bioremediation of contaminated surface soils

Description: The objective of this study was to collect data that would provide a foundation for the concept of using vegetation to enhance in situ bioremediation of contaminated surface soils. Soil and vegetation (Lespedeza cuneata, Paspalum notatum, Pinus taeda, and Solidago sp.) samples from the Miscellaneous Chemicals Basin (MCB) at the Savannah River Site were used in tests to identify critical plant and microbiological variables affecting the fate of trichloroethylene (TCE) in the root zone. Microbiol… more
Date: January 1, 1992
Creator: Anderson, T.A. (Tennessee Univ., Knoxville, TN (United States)) & Walton, B.T. (Oak Ridge National Lab., TN (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Soil loss and leaching, habitat destruction, land and water demand in energy-crop monoculture: some quantitative limits

Description: The environmental impacts of growing biomass for energy, especially for liquid automotive fuels, are potentially large. They are sensitive to the low power production per unit area (high land requirement) and to net energy balances. Initial quantitative estimates were made for impacts per unit power within several classes of impacts, and conversely, for limits to power produced if one avoids worst-class impacts. The following types of biomass energy technologies are considered: ethanol and meth… more
Date: January 1, 1981
Creator: Gutschick, V.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Symphony]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 26, 1977
Duration: 1 minute 40 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Biobarriers used in shallow-burial ground stabilization

Description: These data show that cobblestone can be effective as a barrier to burrowing animals and insects, but not totally effective as a barrier to plant roots. Because of variable weather patterns at Hanford, five to six year studies are recommended for further evaluation of the effectiveness of different materials as biobarriers to radioactive substances. The following criteria must be met to present plant roots from entering buried waste and transporting radioactive or other elements to the soil surf… more
Date: March 1, 1979
Creator: Cline, J.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Demonstration of the economic feasibility of plant tissue culture for jojoba (Simmondsia chinensis) and Euphorbia spp

Description: The economic feasibility of plant tissue culture was demonstrated as applied to two plants: jojoba (Simmondsia chinensis) and Euphorbia spp. The gopher weed (Euphorbia lathyris) was selected as the species of Euphorbia to research due to the interest in this plant as a potential source of hydrocarbon-like compounds. High yield female selections of jojoba were chosen from native stands and were researched to determine the economic feasibility of mass producing these plants via a tissue culture m… more
Date: September 1, 1980
Creator: Sluis, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rooting depth and distributions of deep-rooted plants in the 200 Area control zone of the Hanford Site

Description: This study was conducted to document rooting depths and distributions of deep-rooted plants common to the Hanford Site 200-Area plateau. The effort concentrated on excavating plant species suspected of having deep root systems, and species that have been reported in previous studies to contain radionuclides in above ground parts. The information obtained in this study will be useful in modeling radionuclide transport by plants and in designing covers and barriers for decommissioning low-level r… more
Date: January 1, 1985
Creator: Klepper, E.L.; Gano, K.A. & Cadwell, L.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measuring the efficacy of a root biobarrier with x-ray computed tomography

Description: X-ray computed tomography is a useful tool for investigating soil physical properties nondestructively. There is a need to develop proper calibration relationships between soil properties and the x-ray absorption coefficient. The objective of the work was to evaluate soil factors affecting the x-ray absorption coefficient. Based on a theoretical analysis, experimental data from five soils and on results of several other investigators, it was concluded that for many applications, one calibration… more
Date: August 16, 1990
Creator: Tollner, E. W. & Murphy, C. E. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Root adaptations at stress levels of nitrate, phosphate, or both simultaneously

Description: Sunflowers in flowing hydroponic culture show reduced growth rates at nitrate levels below 10 ..mu..M nitrate or phosphate levels below 0.3 ..mu..F. At least for phosphate, this level is a very small fraction (0.003) of the K/sub m/ for the uptake systems. We have quantified four major adaptations that enable high growth rates under incipient stress: increased root:shoot ratio; increased uptake capacity (V/sub max/) per unit root mass; nocturnal uptake of nutrients; and (only partially adaptive… more
Date: August 1, 1984
Creator: Gutschick, V.P. & Kay, L.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A planning framework for transferring building energy technologies: Executive Summary

Description: Accelerating the adoption of new and existing cost-effective technologies has significant potential to reduce the energy consumed in US buildings. This report summarizes some of the key results of an interlaboratory technology transfer planning effort in support of the US Department of Energy's Office of Building Technologies (the full report is published under SERI number TP-260-3729). A guiding assumption for planning was that OBT's R D program should forge linkages with existing pr… more
Date: August 1, 1990
Creator: Farhar, B C; Brown, M A; Mohler, B L; Wilde, M & Abel, F H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of an Acute Dose of Gamma Radiation Exposure on Stem Diameter Growth, Carbon Gain, and Biomass Partitioning in Helianthus annuus

Description: Nineteen-day-old dwarf sunflower plants (Helianthus annuus, variety NK894) received a variable dose (0-40 Gy) from a cobalt-60 gamma source. A very sensitive stem monitoring device, developed at Battelle's Pacific Northwest Laboratories, Richland, Washington was used to measure real-time changes in stem diameter. Exposure of plants caused a significant reduction in stem growth and root biomass. Doses as low as 5 Gy resulted in a significant increase in leaf density, suggesting that nonreversibl… more
Date: May 25, 1988
Creator: Thiede, M. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rooting patterns in the pinyon-juniper woodland

Description: An extensive bibliographical study documenting rooting patterns of native and introduced plants of the Western United States resulted in a computerized data base of over 1000 different rooting depth citations. From that data base, average rooting depths and frequencies were determined as related to species, habit, soil type, geographic region, root type, family, root depth to shoot height ratios, and root depth to root lateral ratios. Annual grasses were found to root within 1 m of the soil sur… more
Date: January 1, 1985
Creator: Foxx, T.S. & Tierney, G.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ornithogalum Virens as a Plant Assay for Beta and Gamma Radiation Effects

Description: The purpose of this study was to determine if the monocotyledonous angiosperm, Ornithogalum virens (Quintanilha and Cabral, 1947), could be used in such a biological assay system. After exposing O. virens plants to acute (/sup 60/Co) and chronic (/sup 137/Cs) gamma radiation and internal beta radiation (/sup 32/P), lethality (LD/sub 50/, LD/sub 100/), growth inhibition, and chromosome aberrations were investigated. The LD/sub 50/ and LD/sub 100/ for acute gamma radiation were estimated to be be… more
Date: January 1, 1979
Creator: Herron, V J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An assessment of plant biointrusion at the Uranium Mill Tailings Remedial Action Project rock-covered disposal cells

Description: This study is one of a number of special studies that have been conducted regarding various aspects of the Uranium Mill Tailings Remedial Action (UMTRA) Project. This special study was proposed following routine surveillance and maintenance surveys and observations reported in a special study of vegetative covers (DOE, 1988), in which plants were observed growing up through the rock erosion layer at recently completed disposal cells. Some of the plants observed were deep-rooted woody species, a… more
Date: October 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Beneficial consequences of a selective glutamine synthetase inhibitor in oats and legumes

Description: We report on the effects of administering a unique glutamine synthetase inhibitor to cereals and N/sub 2/-fixing legumes. A bacterium (Pseudomonas syringae pv. tabaci) delivers this inhibitor to provide extended treatment periods; we inoculated the root systems of oat and legume plants with pv. tabaci to provide for delivery of this inhibitor to their root or root/nodule systems. Inoculation of legumes is accompanied by increased plant growth, total plant nitrogen, nodulation, and nitrogen fixa… more
Date: January 1, 1988
Creator: Langston-Unkefer, P.J.; Knight, T.J. & Sengupta-Gopalan, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Research in Support of Forest Management. Final report, 1986--1991

Description: This final research report on Research in Support of Forest Management for the Savannah River Forest Station covers the period 1986 thru 1991. This report provides a list of publications resulting from research accomplished by SEFES scientists and their cooperators, and a list of continuing research study titles. Output is 22 research publications, 23 publications involving technology transfer of results to various user groups, and 11 manuscripts in pre-publication format. DOE funding contribut… more
Date: December 1, 1991
Creator: Marx, D. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fate of polycyclic aromatic hydrocarbons in plant-soil systems: Plant responses to a chemical stress in the root zone

Description: Under laboratory conditions selected to maximize root uptake, plant tissue distribution of PAH-derived {sup 14}C was largely limited to root tissue of Malilotus alba. These results suggest that plant uptake of PAHs from contaminated soil via roots, and translocation to aboveground plant tissues (stems and leaves), is a limited mechanism for transport into terrestrial food chains. However, these data also indicate that root surface sorption of PAHs may be important for plants grown in soils cont… more
Date: January 1, 1994
Creator: Hoylman, A. M. & Walton, B. T.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

FACE: Free-Air CO{sub 2} Enrichment for plant research in the field

Description: Research programs concerning the effects of Carbon Dioxide(CO){sub 2} on cotton plants are described. Biological responses studied include foliage response to CO{sub 2} fluctuations; yield of cotton exposed to CO{sub 2} enrichment; responses of photosynthesis and stomatal conductance to elevated CO{sub 2} in field-grown cotton; cotton leaf and boll temperatures; root response to CO{sub 2} enrichment; and evaluations of cotton response to CO{sub 2} enrichment with canopy reflectance observations. more
Date: August 1, 1992
Creator: Hendrey, G. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Leachate treatment system using constructed wetlands, Town of Fenton sanitary landfill, Broome County, New York. Final report

Description: Municipal sanitary landfills generate leachate that New York State regulations require to be collected and treated to avoid contaminating surface water and groundwater. One option for treating leachate is to haul it to municipal wastewater treatment facility. This option may be expensive, may require excessive energy for transportation, and may require pretreatment to protect the receiving facility`s processes. An alternative is on-site treatment and discharge. Personnel from the Town of Fenton… more
Date: November 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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