A surface precipitation model for the sorption of cations on metal oxides

Kevin J. Farley, David A. Dzombak, Francois M. M. Morel

Research output: Contribution to journalArticlepeer-review

433 Scopus citations

Abstract

A new model for the sorption of cations on metal oxides is formulated which allows for a continuum between surface reactions and precipitation. The model extends the surface complexation approach by considering precipitation on the solid to be described by the formation of a solid solution whose composition varies continuously between that of the original solid and a pure precipitate of the sorbing cation. The ability of the surface precipitation model to describe the equilibrium sorption of metal cations on amorphous iron hydroxide is demonstrated. The model can also be extended to describe cation competition and anion sorption.

Original languageEnglish (US)
Pages (from-to)226-242
Number of pages17
JournalJournal of Colloid And Interface Science
Volume106
Issue number1
DOIs
StatePublished - Jul 1985

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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