Porosity and surface area of anionic resins: limitations in the employment of model substrates for the colloidal iron reaction.
Quantitative evaluations of the uptake of an acid ferric hydroxide sol revealed the iron binding of model substrates unrelated to their ion binding capacity. Electron microscopy showed iron particles bound exclusively or mainly to the surfaces of model substrates. Morphometric estimations resulted in a good agreement of the surface/volume ratio with the amount of bound iron. The results are discussed with regard to the steric hindrance of the colloidal iron reaction resulting in a nonstoichiometric interaction.
Anion Exchange Resins↗