Journal of Alloys and Compounds2022，Vol.91212.DOI:10.1016/j.jallcom.2022.165233

Synthesis and spark plasma sintering of solid-state matrices based on calcium silicate for Co- 60 immobilization

Papynov, E. K. Belov, A. A. Azon, S. A. Buravlev, I. Yu Panasenko, A. E. Zadorozhny, P. A. Mayorov, V. Yu Shlyk, D. Kh Nepomnyushchaya, V. A. Kapustina, O. V. Ivanova, A. E. Buravleva, A. A. Merkulov, E. B. Gordienko, P. S. Shichalin, O. O. Yarusova, S. B. Ivanets, A. I.
Journal of Alloys and Compounds2022，Vol.91212.DOI:10.1016/j.jallcom.2022.165233
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  • NSTL
  • Elsevier

Synthesis and spark plasma sintering of solid-state matrices based on calcium silicate for Co- 60 immobilization

Papynov, E. K. 1Belov, A. A. 1Azon, S. A. 1Buravlev, I. Yu 1Panasenko, A. E. 2Zadorozhny, P. A. 2Mayorov, V. Yu 1Shlyk, D. Kh 2Nepomnyushchaya, V. A. 1Kapustina, O. V. 1Ivanova, A. E. 1Buravleva, A. A. 1Merkulov, E. B. 2Gordienko, P. S. 2Shichalin, O. O. 1Yarusova, S. B. 2Ivanets, A. I.3
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作者信息

  • 1. Far Eastern Fed Univ
  • 2. Russian Acad Sci
  • 3. Natl Acad Sci Belarus
  • 折叠

Abstract

An effective sorption material for the immobilization of cobalt radionuclides into highly safe and reliable solid-state matrices is proposed. The resulting silicate sorbent CaSiO3 had an amorphous mesoporous structure (ABET 53 m2/g) and a sorption capacity Co ions of 3.32 mmol/g. The physico-chemical characteristics of the CaCoSi2O6 sample obtained after Co2+ ions sorption were studied using XRD, N2 and Ar adsorption-desorption, SEM-EDX and TG/DTA methods. Solid-state silicate matrices characterized by high density values (2.86-3.16 g/cm3), compressive strength (150-637 MPa) and Vickers microhardness (1.80-5.25 GPa) were obtained by spark plasma sintering (SPS). The sample obtained at 1000 degrees C had the lowest values of Co2+ ions leaching (RCo ~10-7 g/(cm2xday)) and diffusion coefficient (De 1.73 x10-17 cm2/s) from silicate matrices. Thus, the obtained CaCoSi2O6 silicate matrices saturated with Co ions comply with the regulatory requirements of GOST R 50926-96 and ANSI/ANS 16.1 for 60Co immobilization. (c) 2022 Elsevier B.V. All rights reserved.

Key words

Calcium silicate/Co2+&nbsp/adsorption/Spark plasma sintering/Silicate matrices/( 60)&nbsp/Co immobilization/AQUEOUS-SOLUTIONS/CERAMIC MATRICES/SORPTION/REMOVAL/TEMPERATURE/COBALT/ADSORPTION/POWDERS/CO(II)/IONS

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出版年

2022
Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
被引量1
参考文献量71
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