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2 edition of radiolytic and chemical degradation of organic ion exchange resins under alkaline conditions found in the catalog.

radiolytic and chemical degradation of organic ion exchange resins under alkaline conditions

L. R. Van Loon

radiolytic and chemical degradation of organic ion exchange resins under alkaline conditions

effect on radionuclide speciation

by L. R. Van Loon

  • 352 Want to read
  • 15 Currently reading

Published by Paul Scherer Institut in Würenlingen .
Written in English

    Subjects:
  • Ion exchange resins -- Biodegradation,
  • Ion exchange resins -- Chemistry,
  • Radiation chemistry

  • Edition Notes

    Includes bibliographical references.

    StatementL.R. Van Loon and W. Hummel
    SeriesPSI-Bericht -- Nr. 95-13
    ContributionsHummel, W.
    Classifications
    LC ClassificationsTP979.5.I6 V36 1995
    The Physical Object
    Paginationxiii, 96 p. :
    Number of Pages96
    ID Numbers
    Open LibraryOL17394430M

      degradation at specific environmental conditions. This is determined by a standard test method and specified change over time of the property measure (such as physical property or appearance). Examples of this type of degradation could for example be photodegradation, biodegradation or composting. Photodegradable plastic: where degradation is the. chemical degradation. Support advanced data interpretation and process modelling, covering under alkaline reducing conditions as a first step (ion exchange) dominates for Eu(III). Due to the higher thermodynamic stability of acti-File Size: 15MB.

    The 18th Radiochemical Conference - RadChem - aims at maintaining the almost 60 year tradition of this conference series. We strive to continue organising a fruitful and well attended platform for contacts between experts working in both basic and applied research in all aspects of nuclear- and radiochemistry. The conference is organised on behalf of the Division of Nuclear and. Kenneth L. Nash, Gregory R. Choppin (auth.), Kenneth L. Nash, Gregory R. Choppin (eds.) The symposium which provided the incentive for this volume was conducted in San th Diego, California as a part of the National Meeting of the American Chemical Society, March ,

    Emerging Trends in Separation Science and Technology Department of Chemistry, University of Delhi, Delhi - Future Trends in Separations with Ion Exchange Resins & Adsorbents R.M. Paygude, K. Deshpande 90 Studies on Radiolytic degradation of Anion exchange resin under Acidic condition S. T. Jadhav, S.C. Tripathi, S.K. Misra. The applications of copper (Cu) and Cu-based nanoparticles, which are based on the earth-abundant and inexpensive copper metal, have generated a great deal of interest in recent years, especially in the field of catalysis. The possible modification of the chemical and physical properties of these nanoparticles using different synthetic strategies and conditions and/or via postsynthetic Cited by:


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Radiolytic and chemical degradation of organic ion exchange resins under alkaline conditions by L. R. Van Loon Download PDF EPUB FB2

The formation of water-soluble organic ligands by radiolytic and chemical degradation of several strong acidic ion-exchange resins was investigated under conditions close to those of the near. Radiolytic stability of some recently developed ion exchange and extraction chromatographic resins containing diphosphonic acid groups.

Review Article: The Effects of Radiation Chemistry on Solvent Extraction: 1. Conditions in Acidic Solution and a Review of TBP Radiolysis Article in Solvent Extraction and Ion Exchange 27(1) The resins have been irradiated while in contact with HNO{sub 3} (Diphonix, Diphosil and Dipex resins) or NaOH (Diphonix-DS resin) up to an absorbed dose of about Mrad.

As a probe of the resin radiolytic degradation, metal uptake (both equilibrium and kinetics) and. Publications Subjects.

These organic materials can undergo different types of degradation (radiolysis, hydrolysis, biodegradation, etc.) that release a variety of short-chain organic ligands (e.g. acetic, adipic, phthalic and other acids from polymers such as PVC; oxalate from radiolytic degradation of bitumen and ion exchange resins; isosaccharinic acid from Cited by: Swapan Basu, Ajay Kumar Debnath, in Power Plant Instrumentation and Control Handbook, Lead Cation Resin Followed by a Mixed Bed of Strong Cation/Anion Resins.

When the main feedwater undergoes all volatile treatment (AVT) by using ammonia, hydrazine, and/or other volatile amines to provide a reducing environment to control pH and corrosion to save the metals in a steam.

Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) are shown to be globally distributed, environmentally persistent, and bioaccumulative.

Although the toxicities of these compounds were reported, the cleanup procedure from the environment is not developed because of their inertness. In this report the sonochemical degradations of PFOS and PFOA to the products through the. radiolytic degradation of ion exchange resins could result in the generation of acidity by the formation of CO 2 by radiolysis of organic carbon.

The release of SO 4 2-by leaching of sulfonyl groups from acid ion exchange resins is also considered to generate acidity by the oxidation of sulfonyl to sulfate (Van Loon and Hummel, ; Section 4. Keiling C., “The influence of organic complexing agents upon the mobilization and migration of radionuclides from ILW contained in cement and bitumen under nearfield conditions for a repository in a salt dome.

Task 3: Characterization of radioactive waste forms”, Commission of the European Communities, Luxembourg, EUR, pp. ().Cited by: 1. Chemical Speciation of the Uranyl Ion under Highly Alkaline Conditions. Synthesis, Structures, and Oxo Ligand Exchange Dynamics; Preparation of N2/CO2 Triggered Reversibly Coagulatable and Redispersible Latexes by Emulsion Polymerization of Styrene with a Reactive Switchable Surfactant.

Because of its excellent chelating property, ethylenediaminetetraacetic acid (EDTA) is used as a complex agent, not only for heavy metals, but also for radioactive isotopes during the decontamination of nuclear facilities. The removal of EDTA was investigated by adsorption with commercially available, gel-type, anion-exchange resins (AERs), which are based on cross-linked polystyrene with Cited by: 1.

organic compounds (petroleum products) adsorbed on the surface of wood chips in non-irradiated water, held under identical conditions.

When the airflow is injected into the experimental tank containing 10 m 3 of contaminated water, wooden chips, with a total weight. Full text of "Water Chemistry Industrial And Power Station Water Treatment" See other formats. Although effective under certain conditions, most commercially available ion-exchange resins suffer from one or more drawbacks that limit their utility.

For example, commercial resins are typically ineffective at moderate (pH ) to high (> M H+) acidities and in Author: Office of Science.

Organic Resins. A number of interesting new solid ion-exchange materials are in various stages of development. Actinides and some fission products concentrate into the sludge, because the hydroxides are insoluble under alkaline conditions. The sodium salts (nitrate, nitrite, carbonate) compose the salt cake, which probably also incorporates.

â ¢ Organic ion exchange resins for cesium removal can be regener- ated and reused, but are more readily degraded by radiation and corrosive chemicals than inorganic ion exchange material.

Current inorganic ion exchange material generally cannot be regenerated and thus could contrib- ute significantly to the waste volume. Furthermore, thermal explosion accidents have also been reported when ion-exchange resins were applied in the presence of nitric acid and strong oxidants solution.

Nevertheless, mesoporous silica-based materials modified by functional organic macromolecules and resin, which will be discussed in this review, exhibit high radiolytic by: 7. The use of synthetic chemical dyes in various industrial processes, including paper and pulp manufacturing, plastics, dyeing of cloth, leather treatment and printing, has increased considerably over the last few years, resulting in the release of dye-containing industrial effluents into.

This review examines the detailed chemical insights that have been generated through years of work worldwide on magnesium-based inorganic cements, with a focus on both scientific and patent literature.

Magnesium carbonate, phosphate, silicate-hydrate, and oxysalt (both chloride and sulfate) cements are all assessed. Many such cements are ideally suited to specialist applications in precast Cited by:. The conditions of solubilization of the uranium in pure water and in acidic and alkaline solutions were studied, taking in account the concentration of the solutions, the time of leaching, the temperature, the grain size of the crushed material, the presence of oxidizing compounds and of oxygen under pressure.It, along with other emerging tech- nologies, is discussed in Appendix A.

Oxidation Processes In the oxidative degradation of organic compounds, an organic com- pound is converted by means of an oxidizing agent into new materials typi- cally having either a higher oxygen or lower hydrogen content than the original compound.Content: Progress in metal ion separation and preconcentration: an overview / Andrew H.

Bond, Mark L. Dietz, and Robin D. Rogers --Future of separation science in U.S. Department of Energy processing and remediation / Gregory R. Choppin --Solvent extraction in the treatment of acidic high-level liquid waste: where do we stand?/ E.

Philip Horwitz and Wallace W. Schulz --Aqueous complexes in f.