中文摘要：

以便调查 pyrochlore Gd 的沥滤反的能力<潜水艇class=“ a-plus-plus ”> 2 Zr <潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class=“ a-plus-plus ”>使不能调动的 7 一<啜class=“ a-plus-plus ”>3+,三价的钕被使用作为为有三价的放射性的浪费的像， Gd <潜水艇class=“ a-plus-plus ”> 2x Nd <潜水艇class=“ a-plus-plus ”> x Zr <潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class= a-plus-plus > 7 (0.0x2.0)系列样品被高 tem 成功地综合长期的化学稳定性的实验在 40 和 70 点在合成海水被进行 ? 桷敥獬慭吗？

英文摘要：

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 ℃. 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 ℃ is higher than at 40 ℃. 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.