Adsorption of benzoic compounds onto stainless steel particles

Osamu Suzuki, Yoshinaru Shibata, Mikio Inoue

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Equilibrium experiment was conducted to investigate the factors determining the adsorption of benzoic acid (BA) and its derivatives, m- and p-hydroxy BA, onto SUS316L stainless steel particles of 8-10 μm diameter and under 100 mesh. Adsorption isotherms of these benzoic compounds were determined in the presence of 0.05 M NaCl at pH 4 and 30°C. The adsorptions of the these compounds were described well by a Langmuirian model for both adsorbents. When the maximum number of the benzoic compound adsorption sites was expressed on the basis of unit surface area (N, mol/m2), the N values were relatively constant, while the greatest value of the affinity (K, ml/μmol) was obtained for p-hydroxy BA, although its value was in the same range as that of the other two adsorbates. Diffuse-reflectance Fourier transform infrared spectra of the fine adsorbent (8-10 μm diameter) after equilibration suggest that the adsorption mainly takes place through the carboxyl group of the adsorbate-stainless steel surface interaction for all adsorbates, whereas concomitant interaction occurs in part with participation of the phenolic hydroxyl group for p-OH BA adsorbate, accounting for the difference in adsorption properties.

Original languageEnglish
Pages (from-to)234-241
Number of pages8
JournalJournal of Colloid And Interface Science
Volume193
Issue number2
DOIs
Publication statusPublished - 1997 Sep 15
Externally publishedYes

Keywords

  • Adsorption
  • Benzoic acid
  • Cleaning
  • Desorption
  • Fouling
  • Hydroxybenzoic acid
  • Stainless steel

ASJC Scopus subject areas

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

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