Permeation of neodymium and praseodymium through supported liquid membranes containing di- (2-ethylhexyl) phosphoric acid as a carrier

Carlos Moreno, Aleš Hrdlička, Manuel Valiente

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)

Abstract

Transport of Pr (III) and Nd (III) cations between nitrate feed and 0.1 mol/l nitric acid strip solutions through a supported liquid membrane has been studied as a function of both the stirring rate and the chemical composition of the system. The liquid membrane consisted of di-(2-ethylhexyl)phosphoric acid (DEHPA) in kerosene immobilized on a porous di-fluoropolyvinylene laminar support. Reuse of the membrane has been investigated. However, good results were obtained only by reimpregnating of the support. Metal permerability increases sharply with carrier concentration up to 0.1 mol/1 DEHPA and thereafter becomes almost independent of carrier concentration. The dependence of permeability coefficient, P, vs feed pH, measured at low carrier concentration, exhibit maxima at a pH of ca. 3. The values for the membrane separation factor, α=PNd/PPr, of 1.25 and 1.5 have been determined at pH 2.7 and 2.5, respectively. © 1993.
Original languageEnglish
Pages (from-to)121-126
JournalJournal of Membrane Science
Volume81
Issue number1-2
DOIs
Publication statusPublished - 16 Jun 1993

Keywords

  • di-(2-ethylhexyl)phosphoric acid
  • fundamental study
  • neodymium
  • nitrate media
  • praseodymium
  • supported liquid membranes

Fingerprint Dive into the research topics of 'Permeation of neodymium and praseodymium through supported liquid membranes containing di- (2-ethylhexyl) phosphoric acid as a carrier'. Together they form a unique fingerprint.

Cite this