Selective recovery of palladium from a simulated industrial waste water by liquid surfactant membrane process

Takahiko Kakoi, Naoki Horinouchi, Masahiro Goto, Fumiyuki Nakashio

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    Abstract

    The selective recovery of palladium from an acidic solution of high iron concentration with liquid surfactant membranes (LSMs) containing di-2-ethylhexyl monothiophosphoric acid (commercial name MSP-8) as a carrier has been conducted in a batch and a continuous system using a mixer-settler. In the batch operation, the effects of several chemical species and their concentrations on the recovery of palladium were discussed. Using a relatively low concentration of PX100, stable emulsions were obtained and a high degree of palladium recovery was performed by a LSM technique. The concentration of thiourea employed as a stripping agent greatly affected the efficiency of palladium recovery. Under optimum conditions, palladium ions were separated from a large amount of iron ions and they were concentrated from the external feed aqueous solution into the inner receiving phase of W/O emulsions. Furthermore, an effective recovery of palladium could be achieved in a continuous operation using a mixer-settler under the optimum conditions for the batch system.

    Original languageEnglish
    Pages (from-to)63-71
    Number of pages9
    JournalJournal of Membrane Science
    Volume118
    Issue number1
    DOIs
    Publication statusPublished - Sep 4 1996

    All Science Journal Classification (ASJC) codes

    • Biochemistry
    • Materials Science(all)
    • Physical and Theoretical Chemistry
    • Filtration and Separation

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