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 journalArticle

26 Citations (Scopus)


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
Issue number1
Publication statusPublished - Sep 4 1996


All Science Journal Classification (ASJC) codes

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

Cite this