PROTON ADSORPTION AT THE FERRIC OXIDE/AQUEOUS SOLUTION INTERFACE. I. A KINETIC STUDY OF ADSORPTION.

Abstract

A kinetic study of the adsorption of potentialdetermining ions (H+) at the ferric oxide (AlphaFe2O3)/solution interface is reported. The experimental results obtained by potentiometric titrations of suspensions of the synthetically-prepared solid indicate that a two-step process operates at the interface. The observed results may be explained by a rapid adsorption (or desorption) of protons at the surface of the oxide, followed by the slow diffusion of the adsorbed proton into (or out of) a goethite-like interphase separating the bulk anhydrous oxide from the solution phase. Corroborative evidence for the proposed model and mechanism is supplied. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0467670

Entities

People

  • G. Y. Onoda Jr.

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Adsorption
  • Aqueous Solutions
  • Chemical Analysis
  • Desorption
  • Diffusion
  • Sorption
  • Titration

Readers

  • Analytical Chemistry
  • Nanoscale Plasmonic Nanotechnology
  • Systems Analysis and Design