Synergism of crown ethers in the thenoyl trifluoroacetone extraction of americium(III) in benzene medium |
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Authors: | G M Nair D R Prabhu |
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Institution: | (1) Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085 Bombay, (India) |
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Abstract: | The synergism of the crown ethers (CE) dicyclohexano-18-crown-6 (DC18C6), dibenzo-18-crown-6 (DB18C6) and 18-crown-6 (18C6) has been investigated in the thenoyl trifluoroacetone (HTTA) extraction of americium(III) in benzene medium from an aqueous phase of ionic strength 0.5 and pH 3.50 at room temperature (23°C). The extracted synergistic species have the general formula Am(TTA)3 · CE except for DC18C6 in which case the species Am(TTA)3·2CE was also observed at high CE concentrations. The order of synergism was found to be DC18C6>DB18C6>18C6, which is the order of the basicity of CE as indicated by their ability to extract hydrogen ions from nitric acid solutions. |
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