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摘要: 为了解2,6-双(5,6-二异丙基-1,2,4-三唑-3)吡啶（iPr-BTP）在硝酸介质中对镅和铕的萃取行为，以30%辛醇/正十二烷溶液为稀释剂，考察了稀释剂的组成、萃取时间、硝酸浓度、萃取剂浓度及硝酸钠浓度对iPr-BTP萃取Am(Ⅲ)和Eu(Ⅲ)的影响，确定了萃合物组成和萃取反应方程式。实验结果表明，该萃取剂对镅的萃取能力较强，而对铕的萃取能力较弱。iPr-BTP对Am(Ⅲ)和Eu(Ⅲ)的萃取反应方程式可表示为：
M3++3NO-3+3(iPr-BTP)(o)→M(NO3)3·3(iPr-BTP)(o)。
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关键词:
- 2,6-双(5,6-二异丙基-1,2,4-三唑-3)吡啶(iPr-BTP) /
- 萃取 /
- 镅 /
- 铕
Abstract: Using 30% n-octanol/n-dodecane as diluent, the extraction behavior of Am(Ⅲ) and Eu(Ⅲ) from nitric acid solution was studied with 2,6-bis-(5,6-di-isopropyl1,2,4-triazin-3-yl)pyridine (iPr-BTP). By investigating the influences of the concentration of nitric acid, the concentration of iPr-BTP, diluent composition and the contact time and the concentration of NaNO3 on the distribution ratio of Am(Ⅲ) and Eu(Ⅲ), the composition of the extraction complexes and the extraction reaction equation were deduced. The extraction reaction equation may be expressed as follows:
M3++3NO-3+3(iPr-BTP)(o)→M(NO3)3·3(iPr-BTP)(o).The results show that the capability of extracting americium by iPr-BTP is higher than that of extracting europium.
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