Adsorption behaviour of polyelectrolytes on calcium fluoride. Part I: Influence of the pH and the ionic strength on the adsorption isotherms

C. H. De Vreugd, J. H. Ter Horst*, P. F.M. Durville, Geert-Jan Witkamp, G. M. Van Rosmalen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The adsorption behaviour of weak polyelectrolytes onto CaF2 crystals has been investigated to support the research on the mechanism of growth retardation. Adsorption isotherms and surface concentration plateau values of three kinds of poly(phosphino)acrylate, a polyacrylate and a polymaleate were determined at different pH values in pure water and at a higher ionic strength. It was found that the surface concentration plateau values decrease with decreasing pH. The addition of an indifferent salt makes the polyelectrolytes more flexible due to partial screening of the polyelectrolyte charge.

Original languageEnglish (US)
Pages (from-to)259-271
Number of pages13
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume154
Issue number3
DOIs
StatePublished - Aug 31 1999

Keywords

  • Adsorption
  • Adsorption isotherms
  • Calcium fluoride
  • Polyelectrolytes

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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