Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.15372/KhUR2021304
Ключевые слова: cenospheres, sorbents, Zirconium molybdates, zirconium silicates, radioactive waste
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 (SiO2/Al2O3)wt 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+ and Sr2+ removal from simulated wastewater was evaluated on the basis of parameters, such as the distribution coefficient K d (for low Cs+/Sr2+ concentrations) and the maximum sorption capacity a m (for high Cs+/Sr2+ concentrations) determined from the Langmuir sorption isotherms. It was established that the composites trap Cs+ and Sr2+ with K d of up to 104 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 137Cs and 90Sr bearing wastewater including aquatic environment and technological solutions.
Журнал: Химия в интересах устойчивого развития
Выпуск журнала: Т. 29, № 3
Номера страниц: 268-275
ISSN журнала: 08698538
Место издания: Новосибирск
Издатель: Сибирское отделение РАН, Институт химии твердого тела и механохимии СО РАН, Институт катализа им. Г.К. Борескова СО РАН, Новосибирский институт органической химии им. Н.Н. Ворожцова СО РАН, Федеральный исследовательский центр угля и углехимии СО РАН