期刊
RADIOCHIMICA ACTA
卷 96, 期 2, 页码 93-97出版社
WALTER DE GRUYTER GMBH
DOI: 10.1524/ract.2008.1471
关键词
solvent extraction; thermodynamics; plutonium(IV); C(8)mimPF(6); RTIL; CMPO
Solvent extraction studies of Pu(IV) from aqueous nitric acid by carbamoyl methyl phosphine oxide (CMPO) in 1-octyl 3-methyl imidazolium hexa fluorophosphate (C(8)mimPF(6)) room temperature ionic liquid (RTIL) were carried out. It was inferred that the stoichiometry of the Pu(IV) species extracted into RTIL phase, through cation exchange mechanism, is [Pu(NO3)(CMPO)(x)](+3) where x varies from 1 to 2 under the experimental conditions used. Thermodynamic parameters showed the extraction to be favoured by negative enthalpy change, but counteracted by negative entropy change.
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