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首页> 美国卫生研究院文献>Scientific Reports >Direct separation of minor actinides from high level liquid waste by Me2-CA-BTP/SiO2-P adsorbent
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Direct separation of minor actinides from high level liquid waste by Me2-CA-BTP/SiO2-P adsorbent

机译：通过Me2-CA-BTP / SiO2-P吸附剂直接从高含量废液中分离微量act系元素

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Directly separating minor actinides (MA: Am, Cm, etc.) from high level liquid waste (HLLW) containing lanthanides and other fission products is of great significance for the whole nuclear fuel cycle, especially in the aspects of reducing long-term radioactivity and simplifying the post-processing separation process. Herein, a novel silica-based adsorbent Me2-CA-BTP/SiO2-P was prepared by impregnating Me2-CA-BTP (2,6-bis(5,6,7,8-tetrahydro-5,8,9,9-tetramethyl-5,8-methano-1,2,4-benzotriazin-3-yl)pyridine) into porous silica/polymer support particles (SiO2-P) under reduced pressure. It was found Me2-CA-BTP/SiO2-P exhibited good adsorption selectivity towards 241Am(III) over 152Eu(III) in a wide nitric acid range, acceptable adsorption kinetic, adequate stability against γ irradiation in 1 and 3 M HNO3 solutions, and successfully separated 241Am(III) from simulated 3 M HNO3 HLLW. In sum, considering the good overall performance of Me2-CA-BTP/SiO2-P adsorbent, it has great application potential for directly separating MA from HLLW, and is expected to establish an advanced simplified MA separation process, which is very meaningful for the development of nuclear energy.
机译：从含有镧系元素和其他裂变产物的高放废液中直接分离出微量的act系元素（MA：Am，Cm等）对于整个核燃料循环具有重要意义，特别是在减少长期放射性和放射性方面。简化了后处理分离过程。本文中，通过浸渍Me2-CA-BTP（2,6-bis（5,6,7,8-tetrahydro-5,8,9,9,9,9,9）制备了新型的二氧化硅基吸附剂Me2-CA-BTP / SiO2-P -四甲基-5,8-甲基-1,2,4-苯并三嗪-3-基）吡啶在减压下进入多孔二氧化硅/聚合物载体颗粒（SiO2-P）。发现在宽硝酸范围内，Me2-CA-BTP / SiO2-P在 152 Eu（III）上对 241 Am（III）表现出良好的吸附选择性。吸附动力学，在1和3 M HNO3溶液中对γ辐射具有足够的稳定性，并成功从模拟的3 M HNO3 HLLW中分离出 241 Am（III）。综上所述，考虑到Me2-CA-BTP / SiO2-P吸附剂的良好综合性能，在直接从高岭土中分离MA方面具有巨大的应用潜力，有望建立一种先进的简化的MA分离工艺，这对吸附剂具有重要意义。发展核能。

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