Leaching stability of simulated waste forms for immobilizing An3+ by Gd2Zr2O7 with Nd3+

Xirui Lu, Mengjun Chen, Faqin Dong, Xiaoli Wang, Yanlin Wu, Zhengxue Xiao

研究成果: Article

抜粋

In order to investigate the anti-leaching capability of pyrochlore Gd2Zr2O7 immobilized An3+, trivalent neodymium was used as the simulacrums for radioactive wastes with trivalence, Gd2−xNdxZr2O7(0.0⩽x⩽2.0) series samples were successfully synthesized by high temperature solid reaction and using Gd2O3, ZrO2 powders as starting materials. The experiments of long-term chemical stability were conducted in synthetic seawater at 40 and 70 °C. The XRD diffractive data and extraction ratio of as-received samples were collected with the help of X-ray diffraction (XRD) instrument and inductively coupled plasma mass spectrometry (ICP-Mass). The results indicate that the phases of as-received compounds keep the single phase of pyrochlore. The extraction ratio of Gd3+, Zr4+ and Nd3+ in waste forms is increasing with the increase of immersion time in synthetic seawater. The extraction ratio of waste forms at 70 °C is higher than at 40 °C. The highest extraction ratio of Gd3+, Zr4+ and Nd3+ after 42 days is near 0.025 8, 0.003 8 and 0.045 2 μg·mL−1, respectively.

元の言語English
ページ(範囲)885-890
ページ数6
ジャーナルJournal Wuhan University of Technology, Materials Science Edition
29
発行部数5
DOI
出版物ステータスPublished - 2014 10 4
外部発表Yes

ASJC Scopus subject areas

  • Materials Science(all)

フィンガープリント Leaching stability of simulated waste forms for immobilizing An<sup>3+</sup> by Gd<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> with Nd<sup>3+</sup>' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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