Extraction of Am and Eu With iPr-BTP

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-isopropyl1,2,4-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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