Characterization of Hematite and its Interaction with Humic Material Using Flow Field-Flow Fractionation

Mark P. Petteys, Martin E. Schimpf

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The ability of flow field-flow fractionation (FlFFF) to characterize the interaction of organic matter with mineral colloids is demonstrated. Colloidal hematite is first prepared and the size distribution is characterized by scanning electron microscopy, FlFFF, and multi-angle light scattering (MALS). Next, the interaction of well-characterized humic and fulvic acids with the colloidal hematite is studied by separating and quantifying the adsorbed and free acids using FlFFF. Both kinetic and thermodynamic information is obtained, including adsorption isotherms. The adsorptive capacity of hematite is greater for humic acid compared to fulvic acid, probably due to the formation of multiple adsorption layers.

Original languageAmerican English
Pages (from-to)145-158
Number of pages14
JournalChemistry and Biochemistry Faculty Publications and Presentations
Volume816
Issue number2
DOIs
StatePublished - 14 Aug 1998

Keywords

  • Adsorption isotherms
  • Field-field fractionation
  • Flow field-flow fractination
  • Fulvic acid
  • Hematite
  • Humic acid

EGS Disciplines

  • Chemistry

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