Extraction of Americium(III) and Europium(III) with Two Open-Chain Crown Ethers of Amide Type |
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Authors: | Yonghong Wen Zhi Qin Weisheng Liu |
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Institution: | (1) College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China;(2) Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China |
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Abstract: | The extraction of Am3+ and Eu3+ from aqueous picric acid solution by N, N-dinaphthyl-N, N-diphenyl-3,6-dioxaoctanediamide (LI) and 1, 1-(3, 6, 9-trioxaundecanedionyl)diphenothiazine (LII) was investigated by a radioactive tracer technique. Extraction distribution ratios of Am3+ and Eu3+ have been measured as a function of pH, picric acid concentration, extractant concentration, diluent and temperature. The extraction of Am3+ is preferred to that of Eu3+ for both LI and LII, and the latter gives larger separation factor than the former. The equilibrium constants and thermodynamic parameters of extraction reactions were also calculated. |
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