Synergistic extraction of uranium(VI) with tri-n-butyl phosphate and i-butyldodecylsulfoxide |
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| Authors: | Li Lin Yang Yan-Zhao Zeng Shan Zhu Tao Sun Si-Xiu |
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| Institution: | (1) School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.R. China;(2) Department of Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.R. China;(3) School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.R. China;(4) School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.R. China;(5) Department of Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.R. China |
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| Abstract: | Summary The synergistic extraction of uranium(VI) from aqueous nitric acid solution with a mixture of tri-n-butyl phosphate (TBP)
and i-butyldodecylsulfoxide (BDSO) in toluene was investigated. The effects of the concentrations of extractant, nitric acid,
sodium nitrate and sodium oxalate on the distribution ratios of uranium(VI) have been studied. The values of enthalpy change
for the extraction reactions with BDSO, TBP and a mixture of TBP and BDSO in toluene were -23.2±0.8 kJ/mol, -29.2±1.4 kJ/mol
and -30.6±0.6 kJ/mol, respectively. It has been found that the maximum synergistic extraction effect occurs when the molar
ratio of TBP to BDSO is close to 1. The composition of the complex of the synergistic extraction is UO2(NO3)2 . BDSO . TBP. |
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