Acid-base properties of bentonite rocks with different origins

Noémi M. Nagy, József Kónya

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Five bentonite samples (35-47% montmorillonite) from a Sarmatian sediment series with bentonite sites around Sajóbábony (Hungary) is studied. Some of these samples were tuffogenic bentonite (sedimentary), the others were bentonitized tuff with volcano sedimentary origin. The acid-base properties of the edge sites were studied by potentiometric titrations and surface complexation modeling. It was found that the number and the ratio of silanol and aluminol sites as well as the intrinsic stability constants are different for the sedimentary bentonite and bentonitized tuff. The characteristic properties of the edges sites depend on the origins. The acid-base properties are compared to other commercial and standard bentonites.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalJournal of colloid and interface science
Volume295
Issue number1
DOIs
Publication statusPublished - Mar 1 2006

Keywords

  • Acid-base properties
  • Bentonite
  • Montmorillonite
  • Surface complexation

ASJC Scopus subject areas

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

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