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Influence of dissolved organic substances in groundwater on sorption behavior of americium and neptunium

Description: Groundwaters typically contain dissolved organic carbon consisting largely of high molecular weight compounds of humic and fulvic acids. To evaluate whether these dissolved organic substances can enhance the tranport of radionuclides through the groundwater system, experiments were conducted to examine the sorption of americium and neptunium onto crushed basalt in the presence of dissolved humic- and fulvic-acid organic carbon introduced into synthetic groundwater. The partitioning experiments … more
Date: January 1, 1984
Creator: Boggs, S. Jr. & Seitz, M.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radionuclide distributions and migration mechanisms at shallow land burial sites. 1982 annual report of research investigations on the distribution, migration and containment of radionuclides at Maxey Flats, Kentucky

Description: Subsurface waters at Maxey Flats are anoxic, have a high alkalinity and contain high concentrations of ferrous, sulfide and ammonium ions and organic carbon. The trench leachates are extremely variable in composition. Prominent radionuclides include /sup 3/H, /sup 60/Co, /sup 90/Sr, /sup 137/Cs, /sup 238/ /sup 239/ /sup 240/Pu and /sup 241/Am. A wide spectrum of dissolved organic compounds is present in the leachates, including EDTA, polar organics and decomposition products from the waste form… more
Date: February 1, 1984
Creator: Kirby, L.J. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fuel from microalgae lipid products

Description: The large-scale production of microalgae is a promising method of producing a renewable feedstock for a wide variety of fuel products currently refined from crude petroleum. These microalgae-derived products include lipid extraction products (triglycerides, fatty acids, and hydrocarbons) and catalytic conversion products (paraffins and olefins). Microalgal biomass productivity and lipid composition of current experimental systems are estimated at 66.0 metric tons per hectare year and 30% lipid … more
Date: April 1, 1984
Creator: Hill, A.M. & Feinberg, D.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Anaerobic microbial transformations of radioactive wastes in subsurface environments

Description: Radioactive wastes disposed of in subsurface environments contain a variety of radionuclides and organic compounds. Microorganisms play a major role in the transformation of organic and inorganic constituents of the waste and are partly responsible for the problems encountered at the waste disposal sites. These include microbial degradation of waste forms resulting in trench cover subsidence, migration of radionuclides, and production of radioactive gases such as /sup 14/CO/sub 2/, /sup 14/CH/s… more
Date: January 1, 1984
Creator: Francis, A. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design and biological properties of iodine-123 labeled. beta. -methyl-branched fatty acids

Description: The synthetic strategy, synthesis, preclinical evaluation and potential clinical applications of 3-methyl-branched radioiodinated iodophenyl- and iodovinyl-substituted fatty acids are reviewed for use as myocardial imaging agents. 50 references, 6 figures. (ACR)
Date: January 1, 1984
Creator: Knapp, Furn F., Jr. & Goodman, Mark M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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C/sub 4/ photosynthesis in Euphorbia degeneri and E. remyi: a comparison of photosynthetic carbon metabolism in leaves, callus cultures and regenerated plants

Description: Based on analysis of /sup 14/CO/sub 2/ fixation kinetics and assays of enzymes related to C/sub 4/ metabolism (NAD-ME, NADP-ME, NAD-MDH, NADP-MDH, AST, ALT), leaves and regenerated plants of Euphorbia degeneri exhibit a modified NADP-ME-type photosynthesis. Apparently, both aspartate and malate are used for transport of CO/sub 2/ to bundle sheath cells. Callus grown on either non-shoot-forming or shoot-forming media fixes CO/sub 2/ into RPP-cycle intermediates and sucrose, as well as malate and… more
Date: April 1, 1984
Creator: Ruzin, S.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Behavior of complex mixtures in aquatic environments: a synthesis of PNL ecological research

Description: The term complex mixture has been recently applied to energy-related process streams, products and wastes that typically contain hundreds or thousands of individual organic compounds, like petroleum or synthetic fuel oils; but it is more generally applicable. A six-year program of ecological research has focused on four areas important to understanding the environmental behavior of complex mixtures: physicochemical variables, individual organism responses, ecosystems-level determinations, and m… more
Date: June 1, 1984
Creator: Fickeisen, D.H. & Vaughan, B.E. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Integration report for SRC-I post-baseline environmental R and D

Description: The Baseline Design for the wastewater treatment/reuse and solid-waste handling and disposal systems for the SRC-I Demonstration Plant was completed in 1982. Because of the ambitious construction schedule contemplated at that time, the design was not based on comprehensive design data. Consequently, since submission of the Baseline, ICRC has been generating experimental data to confirm and/or refine the Baseline Design. This report integrates all the environmental research and development (R an… more
Date: June 1, 1984
Creator: Yen, A. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NMR spectra of transient radicals

Description: A time-resolved method for the study of structure and spin dynamics of transient radicals in liquids is described. Pulsed electron beam or pulsed laser irradiation is used to create transient radicals in solution. Irradiation is carried out in the field of a variable electromagnet, and the diamagnetic products are transferred rapidly using a fast flow system to an NMR probe. During the radical reaction, a 0.5 to 10 ..mu..s rf pulse is applied to the reacting sample at an appropriate frequency, … more
Date: January 1, 1984
Creator: Trifunac, A. D.; Chiu, T. M. & Nuttall, R. H. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Determination of oil/water and octanol/water distribution coefficients from aqueous solutions from four fossil fuels.

Description: Liquid fossil fuels, both petroleum and synthetically derived oils, are exceedingly complex mixtures of thousands of components. The effect of many of these energy-related components on the environment is largely unknown. Octanol/water distribution coefficients relate both to toxicity and to the bioaccumulation potential of chemical components. Use of these partition data in conjunction with component concentrations in the oils in environmental models provides important information on the fate … more
Date: July 1, 1984
Creator: Thomas, B. L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Leachability of decontamination reagents from cement waste forms

Description: Brookhaven National Laboratory, in order to provide technical information needed by the US Nuclear Regulatory Commission to evaluate the adequacy of near-surface disposal of decontamination wstes, has begun to study the leachability of organic reagents from solidified simulated decontamination wastes. Laboratory-scale cement waste forms containing EDTA, picolinic acid or simulated LOMI decontamination reagent were leach tested. Samples containing an organic reagent on either mixed bed ion-excha… more
Date: November 26, 1984
Creator: Piciulo, P. L.; Davis, M. S. & Adams, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Relationship of Pore Structure to Fluid Behavior in Low Permeability Gas Sands: Final Report

Description: This is the final report of a three-year project concerned with the pore structure of low permeability gas sands. The report is divided into five sections: (1) Pressure Sensitivity of Permeability, (2) Effects of Fluid, Confining Pressure, and Temperature on Absolute Permeabiities of Low Permeability Sandstones, (3) Effect of Acid Leaching and Presence of Fractures, (4) Adsorption, and, (5) Mathematical Modelling and Correlations. In the first section, a data base of core properties is develope… more
Date: January 1, 1984
Creator: Morrow, Norman R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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