Application of the Radiotracer Technique for the Study of the Specific Anion Adsorption on Al(2)O(3) in Acidic Medium.
The specific adsorption of radiolabeled anions (sulfate, chloride) from perchlorate supporting electrolyte on gamma-Al(2)O(3) powder has been investigated. It was demonstrated that a measurable adsorption occurs only at pH values under pH 6. The adsorption capacity of a given amount of gamma-Al(2)O(3) powder tends to a limiting value with decreasing pH. A Langmuir-like adsorption isotherm describes the concentration dependence of the adsorption of sulfate species. It was found that the experimental results are very similar to those obtained in the case of hematite. Copyright 2000 Academic Press.
Horányi
G
Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Budapest, 1525, Hungary
Joó
P