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LOADING AND ELUTION CHARACTERISTICS OF SOME NATURAL AND SYNTHETIC ZEOLITES

Description: The cation exchange characteristics of several commercially available zeolites were evaluated, Equilibrium loading characteristics and exchange capacities were determined experimentally in the binary systems cesium-lithium, cesium-- sodium, cesium--potassium, cesium-Tubidium, cesium -- hydrogen, cesium-- ammonium, strontium-- magnesium, strontium-- calcium, strontium-- barium, and strontium-- hydrogen for several zeolites. Exchangeable cation fractions in the equilibrium solutions were varied f… more
Date: August 10, 1962
Creator: Ames, L.L. Jr. & Knoll, K.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Binding and catalytic reduction of NO by transition metal aluminosilicates

Description: The objective of this research is to provide the scientific understanding of processes that actively and selectively reduce NO in dilute exhaust streams, as well as in concentrated streams, to N{sub 2}. Experimental studies of NO chemistry in transition metal-containing aluminosilicate catalysts are being carried out with the aim of determining the chemical rules for NO reduction on non-precious metals. The catalyst supports chosen for this investigation are A and Y zeolites, mordenite, and mon… more
Date: September 1, 1991
Creator: Klier, Kamil; Herman, Richard G. & Hou, Shaolie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advances in materials science, Metals and Ceramics Division. Triannual progress report, October 1979-January 1980

Description: Progress is summarized concerning magnetic fusion energy materials, laser fusion energy, aluminium-air battery and vehicle, geothermal research, oil-shale research, nuclear waste management, office of basic energy sciences research, and materials research notes. (FS)
Date: March 31, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Treatability study for WAG 6 (SWSA 6) trench water

Description: The Environmental Restoration Program at Oak Ridge National Laboratory (ORNL) is examining methods for remediation and final closure of Waste Area Grouping 6 (WAG 6) under a Resource Conservation and Recovery Act (RCRA) closure plan. WAG 6 consists primarily of Solid Waste Storage Area 6 (SWSA 6), where solid low- level radioactive waste (and some hazardous waste) was buried from 1968 to 1985 in shallow trenches. To support the feasibility study that is being prepared for closure of WAG 6, lab-… more
Date: August 1, 1991
Creator: Taylor, P.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Groundwater prospecting for sandstone-type uranium deposits: the merits of mineral-solution equilibria versus single element tracer methods. Volume 2

Description: This report presents the results of further research on the groundwater geochemistry of 96 well waters in two uraniferous aquifers in Texas and Wyoming, and is a continuation of the work presented by Chatham et al. (1981). In this study variations in concentrations of U, As, Mo, Se and V were compared with the saturation state of the groundwater with respect to mineral phases of these elements known or expected to occur in each area. The non-radiogenic trace elements exhibited strong redox depe… more
Date: August 1981
Creator: Wanty, R. B.; Langmuir, D. & Chatham, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Computed solid phases limiting the concentration of dissolved constituents in basalt aquifers of the Columbia Plateau in eastern Washington. Geochemical modeling and nuclide/rock/groundwater interaction studies

Description: A speciation-solubility geochemical model, WATEQ2, was used to analyze geographically-diverse, ground-water samples from the aquifers of the Columbia Plateau basalts in eastern Washington. The ground-water samples compute to be at equilibrium with calcite, which provides both a solubility control for dissolved calcium and a pH buffer. Amorphic ferric hydroxide, Fe(OH)/sub 3/(A), is at saturation or modestly oversaturated in the few water samples with measured redox potentials. Most of the groun… more
Date: August 1, 1982
Creator: Deutsch, W. J.; Jenne, E. A. & Krupka, K. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tabulation and evaluation of ion exchange data on smectites, certain zeolites and basalt

Description: An extensive search of the literature has been made for ion exchange data on smectites, certain zeolites and basalt. The data are in the form of thermodynamic equilibrium constants, corrected selectivity coefficients, and distribution coefficients. Room temperature alkali and alkaline earth metal cation ion exchange data for smectites are extensive. Correlation between the exchange free energies of alkali metal cations on Camp Berteau montmorillonite values with their Debeye-Hueckel parameter w… more
Date: May 1, 1980
Creator: Benson, L. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Resonance Raman and photophysical studies of transition metal complexes in solution and entrapped in zeolites

Description: We have obtained convincing evidence for localization of the optical electron on a single-ring fragment of a chelated bipyridine-like'' ligand (ie., pyridylpyrazine or 4-Methyl-bipyridine). In addition we have completed studies of Ru(bipyrazine){sub 3}{sup 2+} in aqueous sulfuric acid (0--98% by weight) and find clear evidence for sequential addition of six-protons to the six peripheral nitrogen atoms. Studies of zeolite-entrapped complexes are continuing and a series of homo- and heteroleptic … more
Date: March 31, 1992
Creator: Kincaid, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical applications of positrons

Description: In using positrons as analytical tools the experimenter has two quite different options. The first and more obvious is to duplicate electron methods with positrons and see what differences (if any) result. The second is to exploit a unique characteristic of positrons, such as the formation and decay of the positronium atom, to study chemical composition and surface characteristics. Because positrons do not exist freely in our world, they must be obtained from radioactive sources or nuclear inte… more
Date: January 1, 1985
Creator: Dale, J.M.; Hulett, L.D.; Pendyala, S. & Lyon, W.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Waste/Rock Interactions Technology Program: the status of radionuclide sorption-desorption studies performed by the WRIT program

Description: The most credible means for radionuclides disposed as solid wastes in deep-geologic repositories to reach the biosphere is through dissolution of the solid waste and subsequent radionuclide transport by circulating ground water. Thus safety assessment activities must consider the physicochemical interactions between radionculides present in ground water with package components, rocks and sediments since these processes can significantly delay or constrain the mass transport of radionuclides in … more
Date: April 1, 1982
Creator: Serne, R. J. & Relyea, J. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optimization of glass composition for the vitrification of nuclear waste at the Savannah River Plant

Description: Waste glasses of different compositions were compared in terms of leachability, viscosity, liquidus temperature, and coefficient of expansion. The compositions of the glasses were determined by statistical optimization. Waste glass of the optimized composition is more durable than the current reference composition but can still be processed at low temperature.
Date: January 1, 1982
Creator: Soper, P. D.; Roberts, G. J.; Lightner, L. F.; Walker, D. D. & Plodinec, M. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Risk assessment for the transportation of radioactive zeolite liners

Description: The risk is estimated for the shipment of radioactive zeolite liners in support of the Zeolite Vitrification Demonstration Program currently underway at Pacific Northwest Laboratory under the sponsorship of the US Department of Energy. This program will establish the feasibility of zeolite vitrification as an effective means of immobilizing high-specific-activity wastes. In this risk assessment, it is assumed that two zeolite liners, each loaded around July 1, 1981 to 60,000 Ci, will be shipped… more
Date: January 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermodynamic and kinetic aspects of surface acidity

Description: Our research in the general area of acid catalysis involves the characterization of solid acidity and the corresponding assessment of catalytic performance of acidic materials. Acid characterization studies are required to provide essential information about the type of acid site (i.e., Lewis versus Bronsted), the strength of the sites, and the mobility of molecules adsorbed on the acid sites. An accurate measure of acid strength is given by the heat of adsorption of a basic probe molecule on t… more
Date: January 1, 1992
Creator: Dumesic, J.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Testing of a mobile pilot-scale continuous countercurrent ion exchange system for treatment of low-level radioactive wastewater

Description: A mobile pilot-scale continuous countercurrent ion exchange (CCIX) system is being operated at the Oak Ridge National Laboratory (ORNL) for the treatment of wastewaters that contain predominantly calcium, sodium, and magnesium bicarbonates and are slightly contaminated with {sup 90}Sr and {sup 137}Cs radioisotopes. A demonstration study is being conducted to evaluate the steady state performance and feasibility of a pilot-scale CCIX column for the selective removal of strontium from the wastewa… more
Date: January 1, 1989
Creator: Hall, R.; Brown, C.H. & Robinson, S.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Selection of a form for fixation of iodine-129

Description: This report summarizes work on the selection of an /sup 129/I disposal form. Iodine compounds have been screened on the basis of solubilities, thermal stabilities, cost and availability, toxicity of the cation, and the thermodynamic resistance to oxidation and hydrolysis, and leaching of that compound in portland type III cement. Also considered were iodine capture technology, disposal criteria or guidelines, and the disposal site/strategy. The recommended iodine fixation forms, based on their … more
Date: December 1, 1981
Creator: Burger, L. L.; Scheele, R. D. & Wiemers, K. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical Chemistry Laboratory Progress Report for FY 1991

Description: The purpose of this report is to summarize the activities of the Analytical Chemistry Laboratory (ACL) at Argonne National Laboratory (ANL) for Fiscal Year 1991 (October 1990 through September 1991). This is the eighth annual report for the ACL. The Analytical Chemistry Laboratory is a full-cost-recovery service center, with the primary mission of providing a broad range of analytical chemistry support services to the scientific and engineering programs at ANL. In addition, the ACL conducts a r… more
Date: December 1, 1991
Creator: Green, D. W.; Heinrich, R. R.; Graczyk, D. G.; Lindahl, P. C. & Boparai, A. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Removal and recovery of carbon disulfide emitted by the viscose process

Description: Teepak, Inc., which manufactures cellulose food casings by means of the viscose process, has a plant in Danville, Illinois, that emits approximately 400,000 cubic feet per minute (cfm) of water-saturated air containing approximately 100 parts per million (ppm) of carbon disulfide (CS{sub 2}). Both Teepak and the state of Illinois desire to reduce these emissions as soon as possible; however, the large air flow and very small CS{sub 2} concentration result in a difficult and costly separations p… more
Date: February 1, 1992
Creator: McIntosh, M.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion Testing of a Plutonium-Loaded Lanthanide Borosilicate Glass Made With Frit B.A.

Description: Laboratory tests were conducted with a lanthanide borosilicate (LaBS) glass made with Frit B and added PuO2 (the glass is referred to herein as Pu LaBS-B glass) to measure the dependence of the glass dissolution rate on pH and temperature. These results are compared with the dependencies used in the Defense HLW Glass Degradation Model that was developed to account for HLW glasses in total system performance assessment (TSPA) calculations for the Yucca Mountain repository to determine if that mo… more
Date: September 30, 2006
Creator: Ebert, W. L. & Engineering, Chemical
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ion Exclusion by Sub 2-nm Carbon Nanotube Pores

Description: Carbon nanotubes offer an outstanding platform for studying molecular transport at nanoscale, and have become promising materials for nanofluidics and membrane technology due to their unique combination of physical, chemical, mechanical, and electronic properties. In particular, both simulations and experiments have proved that fluid flow through carbon nanotubes of nanometer size diameter is exceptionally fast compared to what continuum hydrodynamic theories would predict when applied on this … more
Date: April 9, 2008
Creator: Fornasiero, F; Park, H G; Holt, J K; Stadermann, M; Grigoropoulos, C P; Noy, A et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Improved Catalysts for Heavy Oil Upgrading Based on Zeolite Y Nanoparticles Encapsulated Stable Nanoporous Host

Description: The objective of this project is to synthesize nanocrystals of highly acidic zeolite Y nanoclusters, encapsulate them within the channels of mesoporous (nanoporous) silicates or nanoporous organosilicates, and evaluate the 'zeolite Y/Nanoporous host' composites as catalysts for the upgrading of heavy petroleum feedstocks. In comparison to conventionally-used zeolite Y catalysts of micron size particles, the nanocrystals (< 100 nm particle size) which contain shorter path lengths, are expecte… more
Date: September 30, 2007
Creator: Ingram, Conrad & Mitchell, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enhanced Activity of Nanocrystalline Zeolites for Selective Catalytic Reduction of NOx

Description: Nanocrystalline zeolites with discrete crystal sizes of less than 100 nm have different properties relative to zeolites with larger crystal sizes. Nanocrystalline zeolites have improved mass transfer properties and very large internal and external surface areas that can be exploited for many different applications. The additional external surface active sites and the improved mass transfer properties of nanocrystalline zeolites offer significant advantages for selective catalytic reduction (SCR… more
Date: December 31, 2006
Creator: Larson, Sarah C. & Grassian, Vicki H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Uranium and Aluminosilicate Surface Precipitation Tests

Description: The 2H evaporator at the Savannah River Site has been used to treat an aluminum-rich waste stream from canyon operations and a silicon-rich waste stream from the Defense Waste Processing Facility. The formation of aluminosilicate scale in the evaporator has caused significant operational problems. Because uranium has been found to accumulate in the aluminosilicate solids, the scale deposition has introduced criticality concerns as well. The objective of the tests described in this report is to … more
Date: November 27, 2002
Creator: Hu, M.Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Small-Column Ion-Exchange Alternative to Remove 137Cs from Low-Curie Salt Waste: Summary of Phase 1

Description: A Small-Column Ion-Exchange (SCIX) system is being evaluated for removing cesium from the Type 2 and/or Type 3 dissolved saltcake wastes at the Savannah River Site (SRS) to ensure that the dissolved saltcake meets the waste acceptance criteria at the Saltstone Facility. Both crystalline silicotitanate (CST) and IONSIV{trademark} IE-96 zeolite were evaluated as the ion-exchange media. The accelerated alternative, using CST in the SCIX, could save as much as $3 billion in operating and storage co… more
Date: May 12, 2004
Creator: Walker, J. F. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Treating Coalbed Natural Gas Produced Water for Beneficial Use By MFI Zeolite Membranes

Description: Desalination of brines produced from oil and gas fields is an attractive option for providing potable water in arid regions. Recent field-testing of subsurface sequestration of carbon dioxide for climate management purposes provides new motivation for optimizing efficacy of oilfield brine desalination: as subsurface reservoirs become used for storing CO{sub 2}, the displaced brines must be managed somehow. However, oilfield brine desalination is not economical at this time because of high costs… more
Date: March 31, 2008
Creator: Lee, Robert & Li, Liangxiong
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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