Adsorption of salicylate on alumina surfaces

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The adsorption of salicylic acid/salicylate on γ-A1OOH (brockmann alumina, boehmite) and γ-A1(OH)3 (alumina gel, bayerite) was investigated in aqueous electrolyte media. The results of the adsorption and electrokinetic experiments revealed that salicylate adsorption cannot be explained simply in terms of the electrostatic interactions: other contributions also have to be taken into account. Application of an electrostatic model of surface speciation equilibria calculated using the program MINTEQA2 allowed a qualitative description of the behaviour of the system. The deviation from the experimental data was larger for the soluble alumina gel. The observed trends were interpreted in that formation of inner-sphere surface complexes leads to disordering of the solid surface, newly-formed surfaces thereby becoming available for adsorption processes.

Original languageEnglish
Pages (from-to)319-325
Number of pages7
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume141
Issue number3
DOIs
Publication statusPublished - Nov 15 1998

Fingerprint

salicylates
Salicylates
Aluminum Oxide
Alumina
aluminum oxides
Adsorption
adsorption
Gels
gels
electrostatics
Salicylic acid
Salicylic Acid
electrokinetics
Coulomb interactions
solid surfaces
Electrolytes
Electrostatics
electrolytes
deviation
trends

Keywords

  • Adsorption
  • Alumina
  • Salicylate
  • Surface complex formation
  • Surface speciation equilibria
  • Weathering

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Adsorption of salicylate on alumina surfaces. / Szekeres, Márta; Tombácz, Etelka; Ferencz, Kinga; Dékány, Imre.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 141, No. 3, 15.11.1998, p. 319-325.

Research output: Contribution to journalArticle

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