Extraction of cadmium with trilaurylamine-kerosine through a fiat-sheet-supported liquid membrane

G. R.M. Breembroek, Geert-Jan Witkamp*, G. M. Van Rosmalen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Cadmium has been extracted as a chloride complex through a flat-sheet-supported liquid membrane (SLM), using the tertiary amine Alamine 304-1 (mainly trilaurylamine or TLA) in kerosine. The typical permeability of the membrane was 1.1 x 10-6 m s-1. The rate limiting step is diffusion through the membrane. The cadmium loading of the extractant at the feed-membrane interface is high. Trilaurylammonium chloride crystallizes at the surface of the membrane above 0.2 M TLA. This salt blocks the pores and lowers the extraction rate up to a factor of 3. Apart from this blocking effect, the permeability through the membrane is described well with the presented model, using physically realistic parameter values. When the precipitation can be minimized, the system has good potentials for the extraction of cadmium chloride complexes.

Original languageEnglish (US)
Pages (from-to)195-206
Number of pages12
JournalJournal of Membrane Science
Volume147
Issue number2
DOIs
StatePublished - Sep 2 1998

Keywords

  • Cadmium
  • Extraction
  • Supported liquid membrane
  • Transport rates
  • Trilaurylamine

ASJC Scopus subject areas

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

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