title: The separation of aluminum(III) ions from the aqueous solution on membrane filter using Alizarin Yellow R.
abstract: The membrane filtration was examined as an effective and selective method for collection of Al(III) ions from aqueous solutions using Alizarin Yellow R, one of a pH-indicator, as a precipitating reagent. For preparation of aqueous solutions without precipitate or turbidity, a non-ionic surfactant, Triton X-100, was used as a solubilizing reagent for insoluble materials. Three metal ions, Al(III), V(III) and Cu(II) ions, were able to be collected as yellow-orange precipitates from aqueous solutions controlled in a range of pH 4-7, pH 4-9, and pH 5.5-12, respectively, on a membrane filter by filtration under suction. Hydrogen peroxide and o-phenanthroline were found to be capable of masking V(III) and Cu(II) ions in a range of pH 5.5-8 in which Al(III) ions were collected. This membrane filtration was applied to selective separation and determination of Al(III) ions in tap water.
authors.affiliation: Department of Materials Science, Faculty of Engineering, Ibaraki University, Hitachi, Ibaraki 316-8511, Japan. edta@mail.goo.ne.jp
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Ihara
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Hasegawa
authors.forename: Kunishige
authors.initials: K
authors.lastname: Naito