首页|Synthesis and spark plasma sintering of solid-state matrices based on calcium silicate for Co- 60 immobilization
Synthesis and spark plasma sintering of solid-state matrices based on calcium silicate for Co- 60 immobilization
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
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.
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.
NSTL
Elsevier
