Use of Monodisperse Ion Exchangers for Arsenic/Antimony Removal

摘要

PURPOSE: Use of monodisperse amino/ammonium-functionalized ion exchangers or of monodisperse chelating resins for the selective removal of arsenic ions or of antimony ions from aqueous solutions. CONSTITUTION: The process for selective adsorption of arsenic ions and/or of antimony ions from aqueous solutions comprises the step of treating aqueous solutions containing SbF6ions or AsF6ions with monodisperse anion exchangers or monodisperse chelating resins(particularly monodisperse amino/ammonium-functionalized anion exchangers or monodisperse chelating resins). If the arsenic or antimony compounds are not already present in the oxidation state +5, the compounds are converted oxidatively in advance into AsF6ions or SbF6ions, which are adsorbed from aqueous solutions, particularly preferably from aqueous solutions for which the pH is neutral or weakly alkaline or else acid.