Microsphere Sorbents Based on Cenosphere Supported Zirconium Molybdates and Zirconium Silicates for Cesium-137 and Strontium-90 Removal from Radioactive Waste Solutions : научное издание
Библиографическое описание:Microsphere Sorbents Based on Cenosphere Supported Zirconium Molybdates and Zirconium Silicates for Cesium-137 and Strontium-90 Removal from Radioactive Waste Solutions : научное издание / T. A. VERESHCHAGINA [et al.]. - Текст : непосредственный // Chemistry for Sustainable Development. - 2021. - Т. 29, № 3. - P. 261-268. - Cited Reference Count: 24. - This work was conducted within the framework of the budget project #0287-2021-0013 for the Institute of Chemistry and Chemical Technology SB RAS (Krasnoyarsk) using the equipment of the Krasnoyarsk Regional Research Equipment Centre of SB RAS for SEMEDS study and AAS analysis. The authors acknowledge Dr. E. V. Mazurova for SEM examination, V. V. Yumashev for surface area measurements, O. A. Levitskaya and V. R. Kuzik for AAS analysis, L. A. Solovyov for PXRD study., [0287-2021-0013]. - ISSN 1817-1818, DOI 10.15372/CSD2021304.
Аннотация:The microsphere composites were prepared by covering microsphere glass-crystalline supports with as-synthesized crystalline zirconium molybdate (Mo/Zr = 1.7) and pre-synthesized microporous sodium zirconium silicates of hilairite and gaidonnayite structural types. Narrow fractions of coal fly ash cenospheres with (SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub>)<sub>wt</sub> of 2.7 and 3.0 were used as precursors of the supports. The composites were studied by means of SEM, EDX and PXRD. The efficiency for Cs<sup>+</sup> and Sr<sup>2+ </sup>removal from simulated wastewater was evaluated on the basis of parameters, such as the distribution coefficient K <sub>d</sub> (for low Cs<sup>+</sup>/Sr<sup>2+ </sup>concentrations) and the maximum sorption capacity a <sub>m</sub> (for high Cs<sup>+</sup>/Sr<sup>2+ </sup>concentrations) determined from the Langmuir sorption isotherms. It was established that the composites trap Cs<sup>+</sup> and Sr<sup>2+ </sup>with K <sub>d</sub> of up to 10<sup>4 </sup>mL/g. The influence of zirconium molybdate and sodium zirconium silicate composition and structure on their sorption abilities was demonstrated. The proposed resource-saving approach to the preparation of composite sorbents along with their high sorption parameters favours their application for decontamination of <sup>137</sup>Cs and <sup>90</sup>Sr bearing wastewater including aquatic environment and technological solutions.
Издательство:Федеральный исследовательский центр угля и углехимии СО РАН, Институт химии твердого тела и механохимии СО РАН, Институт катализа им. Г.К. Борескова СО РАН, Сибирское отделение РАН, Новосибирский институт органической химии им. Н.Н. Ворожцова СО РАН, Novosibirsk
Источник:Chemistry for Sustainable Development
Выпуск:Т. 29, № 3
Номера страниц:261-268
Держатель оригинала документа:Department of Chemistry, Siberian Federal University, Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
Количество экземпляров:
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