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

被引：7

作者：

Shichalin, O. O. ^{[1
]}

Yarusova, S. B. ^{[2
,3
]}

Ivanets, A. I. ^{[4
]}

Papynov, E. K. ^{[1
]}

Belov, A. A. ^{[1
]}

Azon, S. A. ^{[1
]}

Buravlev, I. Yu ^{[1
,2
]}

Panasenko, A. E. ^{[2
]}

Zadorozhny, P. A. ^{[2
]}

Mayorov, V. Yu ^{[1
,2
]}

Shlyk, D. Kh ^{[2
]}

Nepomnyushchaya, V. A. ^{[1
]}

Kapustina, O. V. ^{[1
]}

Ivanova, A. E. ^{[1
]}

Buravleva, A. A. ^{[1
]}

Merkulov, E. B. ^{[2
]}

Gordienko, P. S. ^{[2
]}

机构：

[1] Far Eastern Fed Univ, 10 Ajax Bay,Russky Isl, Vladivostok 690922, Russia

[2] Russian Acad Sci, Inst Chem, Far Eastern Branch, 159,Prosp 100 letiya, Vladivostoka 690022, Russia

[3] Vladivostok State Univ Econ Serv, Gogolya st 41, Vladivostok 690014, Russia

[4] Natl Acad Sci Belarus, Inst Gen & Inorgan Chem, Surganova st 9-1, Minsk 220072, BELARUS

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 912卷

关键词：

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

D O I：

10.1016/j.jallcom.2022.165233

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：12