Novel organophosphorus extractants for the recycle of transuranium elements

Jun Ichiro Yamagawa, Masahiro Goto, Fumiyuki Nakashio

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    Novel extractants having two functional phosphonic groups in the molecular structure have been synthesized. The solvent extraction of six lanthanide group metals in nitric acid media has been investigated with a view to developing an extraction model suited to transuranium elements in a liquid-liquid extraction system. Results have shown that the novel extractants possess superior extraction characteristics and selectivity for lanthanides as compared to ordinary mono-phosphonic acid extractants. The enhanced extraction properties of the newly synthesized extractants are attributed to the presence in the molecular structure of a shorter alkyl chains linking the two constituted functional groups. In addition, the thermodynamic properties, entropy and enthalpy, have been evaluated from temperature dependent extraction profiles to elucidate the extraction mechanism.

    Original languageEnglish
    Pages (from-to)12-22
    Number of pages11
    JournalSolvent Extraction Research and Development, Japan
    Issue number4
    Publication statusPublished - 1997

    All Science Journal Classification (ASJC) codes

    • General Chemistry
    • General Chemical Engineering
    • Filtration and Separation


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