Immobilization of simulated radioactive soil waste containing cerium by self-propagating high-temperature synthesis

Mao, Xianhe; Zhi-gui, Qin; Yuan, Xiao; Wang, Chunming; Cai, Xun; Zhao, Weixia; Zhao, Kang; Yang, Ping; Fan, X.

doi:10.1016/j.jnucmat.2013.07.031

Cited by 12 publications

(2 citation statements)

References 10 publications

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“…Compared with conventional solid‐state reaction processes, SHS is characterized as high temperature and reaction speed, low energy consumption, low cost, simplified equipment requirement, and process simplicity . Because of these advantages, SHS technique has been proposed as a candidate approach for environmental protection, such as immobilization of radioactive and toxic wastes …”

Section: Introductionmentioning

confidence: 99%

SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO₃ as the Oxidant

et al. 2016

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In this study, zirconolite (CaZrTi 2 O 7 )/Mo composite was rapidly synthesized by self-propagating high-temperature plus quick pressing (SHS/QP) technique using MoO 3 as the oxidant. As the surrogate of tetravalent actinide nuclides, up to 50 at.% CeO 2 (about 17.5 wt% of the raw material) was introduced to substitute the Zr site of zirconolite. Perovskite (CaTiO 3 ) and rutile TiO 2 were inevitably produced after the incorporation of CeO 2 . The raw CeO 2 was partially reduced to trivalent state, which promotes the substitution of Ce into the Ca sites of perovskite and zirconolite. The aqueous durability of Ce-bearing waste form was investigated with normalized leaching rates (42 d) of Ce in moderate value of about 10 -2 g m -2 d -1 .

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Section: Introductionmentioning

confidence: 99%

SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO₃ as the Oxidant

et al. 2016

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“…The radioactive nuclides in HLW, such as 137 Cs, 90 Sr, 239 Pu, 235 U, etc., possess the characteristics of long half-life, high toxicity, and high heat generation [2,3]. When these radionuclides enter the soil, the situation becomes more complicated because the presence of soil will increase the cost of disposal [4,5]. Furthermore, soil contaminated by highly radioactive nuclides may pose a long-term threat to organisms due to ecological cycling [6,7].…”

Section: Introductionmentioning

confidence: 99%

Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd2Ti2O7 Pyrochlore Matrix

Xue

Zhang

et al. 2019

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A rapid and effective method is necessary in the disposal of severely radioactive contaminated soil waste. Simulated Ce-bearing radioactive soil waste was immobilized by self-propagating high-temperature synthesis (SHS) within 5 min in this study. The main work includes the rapid synthesis of soil waste forms, the analysis of phase composition, microstructure and chemical durability. These results show that the simulated nuclide Ce was successfully immobilized into the pyrochlore-rich waste matrice, whose main phases are SiO2, pyrochlore (Gd2Ti2O7) and Cu. The normalized leaching rates of Si and Na on the 42nd day are 1.86 × 10−3 and 1.63 × 10−2 g·m−2·d−1, respectively. And the normalized leaching rate of Ce also remains at low level (10−5–10−6 g·m−2·d−1) within 42 days.

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Self-propagating High-temperature Synthesis of Sm and Zr Co-doped Gd2Ti2O7 Pyrochlore Ceramics as Nuclear Waste Forms

Xie

Zhang

et al. 2021

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Immobilization of simulated radioactive soil waste containing cerium by self-propagating high-temperature synthesis

Cited by 12 publications

References 10 publications

SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO₃ as the Oxidant

SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO₃ as the Oxidant

Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd2Ti2O7 Pyrochlore Matrix

Self-propagating High-temperature Synthesis of Sm and Zr Co-doped Gd2Ti2O7 Pyrochlore Ceramics as Nuclear Waste Forms

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Immobilization of simulated radioactive soil waste containing cerium by self-propagating high-temperature synthesis

Cited by 12 publications

References 10 publications

SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO3 as the Oxidant

SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO3 as the Oxidant

Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd2Ti2O7 Pyrochlore Matrix

Self-propagating High-temperature Synthesis of Sm and Zr Co-doped Gd2Ti2O7 Pyrochlore Ceramics as Nuclear Waste Forms

Contact Info

Product

Resources

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SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO₃ as the Oxidant

SHS/QP Synthesis and Characterization of Ce‐Bearing Zirconolite‐Rich Waste Forms Using MoO₃ as the Oxidant