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Bibliografie tematiche / Crystalline silicotitanates (CST)

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Letteratura scientifica selezionata sul tema "Crystalline silicotitanates (CST)"

Autore: Grafiati

Pubblicato: 26 settembre 2023

Ultima modifica: 31 luglio 2025

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Articoli di riviste sul tema "Crystalline silicotitanates (CST)"

1

Chitra, S., R. Sudha, S. Kalavathi, A. G. S. Mani, S. V. S. Rao, and P. K. Sinha. "Optimization of Nb-substitution and Cs+/Sr+2 ion exchange in crystalline silicotitanates (CST)." Journal of Radioanalytical and Nuclear Chemistry 295, no. 1 (2012): 607–13. http://dx.doi.org/10.1007/s10967-012-1812-0.

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2

Nyman, M., T. M. Nenoff, Y. Su, M. L. Balmer, A. Navrotsky, and H. Xu. "New Crystalline Silicotitanate (CST) Waste Forms: Hydrothermal Synthesis and Characterization of CS-SI-TI-O Phases." MRS Proceedings 556 (1999). http://dx.doi.org/10.1557/proc-556-71.

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AbstractThe radioactivity of the Hanford site waste tanks is primarily from 137Cs and 90Sr, of which can both be selectively removed from solution using a crystalline silicotitanate (CST) ion exchanger. We are currently seeking waste forms alternative to borosilicate glass for Cs-CSTs. In order to obtain a fundamental basis for the development of an alternative waste form, we are investigating synthesis and characterization of CST component phases, namely Cs-Si-Ti-O phases. Two novel Cs-Ti-Si-O phases (one porous, one condensed) have been hydrothermally synthesized, characterized and evaluated

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3

Westesen, Amy, Emily Campbell, and Reid Peterson. "Enhanced prediction of Cs removal by CST from Hanford tank waste with K accountability." Environmental Progress & Sustainable Energy, December 3, 2024. https://doi.org/10.1002/ep.14535.

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AbstractThe treatment of Hanford tank waste is one of the most challenging environmental cleanup activities to date. To expedite the processing of liquid waste stored in underground tanks in Washington State it is necessary to remove the significant dose contributor, 137Cs. Crystalline silicotitanate ion exchanger is currently used to remove 137Cs from the aqueous phase of Hanford tank wastes in preparation for vitrification at the Waste Treatment and Immobilization Plant (WTP). Improving the understanding of potassium impacts on ion exchange behavior of Cs will help in the operation of a crit

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4

Nyman, May, James L. Krumhansl, Carlos Jove-Colon, et al. "Chemical Interactions of UOP IONSIV IE-911 (CST) with SRS Waste Simulants." MRS Proceedings 713 (2002). http://dx.doi.org/10.1557/proc-713-jj12.4.

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ABSTRACTIE-911 is a bound form of cystalline silicotitanate (CST) that was extensively tested for removing 137Cs from the Savannah River Site (SRS) tank wastes. In some simulant tests, column plugging incidents were observed, which led to thorough investigations to determine the causes and to develop protocols to avoid future plugging incidents. A related problem was the apparent decrease in Cs scavenging capability in some long-term tests. Our studies revealed that the interaction of IE-911 with the highly basic, high ionic strength, SRS average salt simulant could result in precipitation of;

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5

Gu, B. X., L. M. Wang, S. X. Wang, and R. C. Ewing. "Radiation Effects on Materials in the Near-Field of a Nuclear Waste Repository." MRS Proceedings 663 (2000). http://dx.doi.org/10.1557/proc-663-883.

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ABSTRACTThe long-term radiation effects on materials in the near-field of a nuclear waste repository have been evaluated using accelerated laboratory experiments with energetic electron or ion beam irradiation. The materials studied include: zeolites, layered silicates (smectite clay and mica), as well as crystalline silicotitanate (CST) which is an important ion exchange material for the chemical separation of high-level liquid radioactive wastes.In situ transmission electron microscopy (TEM) during irradiation by energetic electrons and ions has shown that all of the studied materials are su

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6

Campbell, Emily L., Amy M. Westesen, and Reid A. Peterson. "Investigation into Na and Cs activity coefficients in high salt solutions to support Cs removal in Hanford tank waste." Radiochimica Acta, September 8, 2023. http://dx.doi.org/10.1515/ract-2023-0134.

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Abstract The treatment of Hanford tank waste is one of the most technically challenging environmental cleanup activities for the U.S. Department of Energy to date. To expedite the processing of liquid waste stored in underground tanks in southeastern Washington state, it is necessary to remove the significant dose contributor, 137Cs. Toward this effort, ion exchange with crystalline silicotitanate (CST) has been employed as part of the Tank Side Cesium Removal system. The model used to predict Cs exchange onto CST was developed using activity coefficients calculated from the Bromley equation.

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Tesi sul tema "Crystalline silicotitanates (CST)"

1

Milcent, Théo. "Mise en place d'une nouvelle méthodologie d'évaluation d'un échangeur d'ions minéral du point de vue de sa sélectivité : Cas particulier de l'optimisation structurale et microstructurale d'un silicotitanate cristallin (CST), appliqué à la décontamination d'effluents simultanément contaminés en Sr2+ et Cs+." Electronic Thesis or Diss., Montpellier, Ecole nationale supérieure de chimie, 2022. http://www.theses.fr/2022ENCM0010.

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Les alumino, titano et zircono-silicates zéolithiques sont des matériaux présentant des propriétés intéressantes pour de nombreuses applications dans la pétrochimie, l'agriculture, le médical, le stockage d'énergie ainsi que la décontamination d'effluents. Dans le domaine du traitement des effluents radioactifs, leurs propriété d'échange d'ions font de ces matériaux des extractants de radionucléides efficaces avec de bonnes sélectivités (e.g. césium ou strontium). Leurs compositions (le ratio Al/Si, Ti/Si, Zr/Si… ; la nature et la charge des métaux ; la nature, la charge, la concentration et l

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2

Kim, Sung Hyun. "Ion exchange kinetics of cesium for various reaction designs using crystalline silicotitanate, UOP IONSIV IE-911." Texas A&M University, 2003. http://hdl.handle.net/1969.1/282.

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Through collaborative efforts at Texas A&M University and Sandia National Laboratories, a crystalline silicotitanate (CST), which shows extremely high selectivity for radioactive cesium removal in highly concentrated sodium solutions, was synthesized. The effect of hydrogen peroxide on a CST under cesium ion exchange conditions has been investigated. The experimental results with hydrogen peroxide showed that the distribution coefficient of cesium decreased and the tetragonal phase, the major component of CST, slowly dissolved at hydrogen peroxide concentrations greater than 1 M. A simple

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Capitoli di libri sul tema "Crystalline silicotitanates (CST)"

1

Miller, James E., Norman E. Brown, James L. Krumhansl, Daniel E. Trudell, Rayford G. Anthony, and C. V. Philip. "Development and Properties of Cesium Selective Crystalline Silicotitanate (CST) Ion Exchangers for Radioactive Waste Applications." In Science and Technology for Disposal of Radioactive Tank Wastes. Springer US, 1998. http://dx.doi.org/10.1007/978-1-4899-1543-6_21.

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Atti di convegni sul tema "Crystalline silicotitanates (CST)"

1

Mimura, Hitoshi, Minoru Matsukura, Tomoya Kitagawa, et al. "Evaluation of Adsorption Properties of U(VI) for Various Inorganic Adsorbents." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81338.

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Large amounts of highly contaminated water over 800,000 m3 accumulated in the reactor, turbine building and the trench in the facility were generated from the nuclear accident of Fukushima NPS (BWR) caused by the Great East Japan Earthquake. At present, the cold shutdown is completed stably by the circulating injection cooling system (SARRY, KURION) for the decontamination of radioactive nuclides such as 134Cs and 137Cs using zeolites and crystalline silicotitanate (CST). Further, the Advanced Liquid Processing System (ALPS) is under operation for the decontamination of 62 nuclides such as 90S

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2

Denton, Mark S., and Mercouri G. Kanatzidis. "Innovative Highly Selective Removal of Cesium and Strontium Utilizing a Newly Developed Class of Inorganic Ion Specific Media." In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16221.

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Highly selective removal of Cesium and Strontium is critical for waste treatment and environmental remediation. Cesium-137 is a beta-gamma emitter and Strontium-90 is a beta emitter with respective half-lives of 30 and 29 years. Both elements are present at many nuclear sites. Cesium and Strontium can be found in wastewaters at Washington State’s Hanford Site, as well as in wastestreams of many Magnox reactor sites. Cesium and Strontium are found in the Reactor Coolant System of light water reactors at nuclear power plants. Both elements are also found in spent nuclear fuel and in high-level w

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Rapporti di organizzazioni sul tema "Crystalline silicotitanates (CST)"

1

Andrews, M. K., and J. R. Harbour. Glass formulation requirements for Hanford coupled operations using crystalline silicotitanates (CST). Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/554132.

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DARREL, WALKER. Digestion of Crystalline Silicotitanate (CST). Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/837905.

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Jacobs, R. A. Powdered Crystalline Silicotitanate (CST) Isotherms for SRS Wastes. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/4821.

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Gauglitz, Phillip A., Courtney LH Bottenus, Gregory K. Boeringa, Carolyn AM Burns, and Philip P. Schonewill. Drying of Crystalline Silicotitanate (CST) Beds by Air Flow. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1545578.

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5

Andrews, M., T. Fellinger, D. Ferrara, J. Harbour, and D. Herman. Vitrification of cesium-loaded crystalline silicotitanate (CST) in the shielded cells melter. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/352918.

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Miller, J. E., and N. E. Brown. Development and properties of crystalline silicotitanate (CST) ion exchangers for radioactive waste applications. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/469131.

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7

WILLIAM, WILMARTH. Reactivity of Crystalline Silicotitanate (CST) and Hazardous Metal/Actinide Loading During Low Curie Salt Use. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/837909.

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8

HANG, THONG, and DANIEL MCCABE. CRYSTALLINE SILICOTITANATE (CST) ION EXCHANGE MEDIA PERFORMANCE EVALUATIONS TO SUPPORT TSCR DSA IX MEDIA EQUILIBRIUM CONTACTS. Office of Scientific and Technical Information (OSTI), 2021. http://dx.doi.org/10.2172/1822676.

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9

Andrews, M. K., and P. J. Workman. Glass formulation development and testing for the vitrification of DWPF HLW sludge coupled with crystalline silicotitanate (CST). Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/564994.

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10

Taylor-Pashow, K. M. L., T. B. Edwards, and C. A. Nash. Pretreatment of Crystalline Silicotitanate (CST) and development of a digestion standard to support Tank Closure Cesium Removal (TCCR). Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1501827.

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