Coal fly ash cenospheres and their application for immobilization of liquid radioactive waste

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: International Conference on Environmental Remediation and Radioactive Waste Management, ICEM'05

Год издания: 2005

Ключевые слова: Cenospheres, Encapsulated sorbents, Radioactive waste, Aluminum compounds, Coal, Composite materials, Encapsulation, Mossbauer spectroscopy, Porous materials, Radioactive waste vitrification, Radioactive wastes, Silicates, Cenospheres, Encapsulated sorbents, Liquid radioactive waste (LRW), Triisobutylphosphine sulfide, Fly ash

Аннотация: The detailed study of composition, morphology and properties of coal fly ash hollow aluminosilicate microspheres (cenospheres) resulted from combustion of Kuznetskii coal was carried out by methods of Mossbauer spectroscopy, optical and scanning electron microscopies, thermodynamic analysis of phase composition for multicomponent aluminosilicate systems. The process to isolate cenospheres of constant composition including magnetic separation, grain size and gravity classification was developed. About 30 microspherical products of different composition with an iron content in the range of 2-15 wt.% were obtained. Cenosphere-derived porous materials and sorbents for immobilization of liquid radioactive waste (LRW) were developed in this work. The peculiarities of cenosphere modification by treatment with mineral acids resulting in the different porosity of the cenosphere shell are discussed. The possibility to produce composite inorganic ion exchangers (ammonium molybdophosphate - AMP; copper, nickel and iron ferrocyanides - Cu-FOC, Ni-FOC and Fe-FOC; zirconium phosphate - ZrP) and solid extradants (triisobutylphosphine sulfide - TIBPS, trioctylphosphine oxide - TOPO) by their encapsulation inside perforated porous cenospheres has been demonstrated. Characteristics of the sorbents in sorption of 137Cs and stable palladium isotope were determined using model solutions and simulants of actual radioactive waste. Copyright © 2005 by ASME.

Ссылки на полный текст

Издание

Журнал: Proceedings - 10th International Conference on Environmental Remediation and Radioactive Waste Management, ICEM'05

Выпуск журнала: Vol. 2005

Номера страниц: 1124-1131

Авторы

  • Anshits N.N. (Institute of Chemistry and Chemical Technology SB RAS)
  • Vereshchagina T.A. (Institute of Chemistry and Chemical Technology SB RAS)
  • Fomenko E.V. (Institute of Chemistry and Chemical Technology SB RAS)
  • Kruchek D.M. (Mining Chemical Combine)
  • Paretskov E.N. (Mining Chemical Combine)
  • Bajukov O.A. (Institute of Physics SB RAS)
  • Kyrenskii L.V. (Institute of Physics SB RAS)
  • Zykova I.D. (Krasnoyarsk State Technical University)
  • Anshits A.G. (Institute of Chemistry and Chemical Technology SB RAS)

Вхождение в базы данных

Информация о публикациях загружается с сайта службы поддержки публикационной активности СФУ. Сообщите, если заметили неточности.

Вы можете отметить интересные фрагменты текста, которые будут доступны по уникальной ссылке в адресной строке браузера.