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  • 1
    Electronic Resource
    Electronic Resource
    Recovery of neptunium from macroamounts of uranium by extraction with 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 143 (1990), S. 397-401 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Conditions for neptunium recovery from nitrate solution containing large amounts of uranium by extraction with 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (PMBP), and a mixture of PMBP with di-2-ethyl-hexylphosphoric acid (HDEHP) were studied. A two-stage technique, based on removal of uranium macroamounts at the first stage by means of extraction of uranium with PMBP and HDEHP mixture, and neptunium extraction by PMBP at the second stage, was suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039608
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Electrodeposition of actinide traces from aqueous alkaline solutions and tributyl phosphate (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 147 (1991), S. 51-58 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The electrodeposition of uranium and trace quantities of239Pu,234Th,144Ce on a stainless steel disk has been investigated from 0.5–2.0M NaOH and the two-phase system: extract of actinides in TBP-aqueous solution of NaOH. The electrodeposition yield of the above elements reaches 98–100% in 40 min of electrolysis with current density 0.4–0.5 A/cm2. The presence of 0.5M Na2CO3, 2.0M NaNO3, 2.0M NaNO2, 0.2M NaF in alkaline solutions does not decrease the electrodeposition yield. The electrodeposited films meet all the requirements of α-spectrometry. The uranium oxidation states (V) and (IV) have been determined in the electrodeposited films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039565
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Use of complex-forming agents for extraction separation of cerium group of rare-earth elements in systems with neutral organophosphorus extractants (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 125 (1988), S. 381-391 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The use of complexons: nitrilotriacetic (NTA) and diethylenetriaminepentaacetic (DTPA) acids have been studied in extraction systems with main classes of neutral organo phosphorus extractants: phosphates (tributyl phosphate-TBP), phosphonate (diisooctylmethyl phosphonate-DiOMP) and phosphine oxides (triisoamylphosphineoxide-TiAPO) to separate lanthanides of the Ce subgroup. Optimal conditions to use complexon have been determined (extractant and salting agent concentrations). The effect of the type of extractant on the lanthanide distribution coefficients' dependence on pH of equilibrium water solution have been studied in the presence of NTA and DTPA. Unextractable cation displacers have been used to regulate distribution coefficients. The values of lanthanide separation coefficients of Ce group have been determined in extraction systems with neutral phosphorus-containing extraction agents — complexon — salting agent compared with Nd macroconcentrations and for lanthanide microconcentrations in the presence of cation displacer. These systems have been shown to be suitable for lanthanide separation of the cerium group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041696
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    Paper (German National Licenses)
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