シリカ・アルミナ吸着剤の陰イオン吸着特性

シリカ・アルミナ吸着剤の利用に関する研究(第2報)

抄録

The adsorption of fourteen kinds of anions on a silica-alumina adsorbant(containing 2.70% aluminum and treated at 500°C) was studied by a batch method.
The adsorption capacity was decreased in the following sequence; Cr₂O₇^2-> EDTA^2- > Fe(CN)₆^3- >Fe(CN)₆^4- >SO₄^2- >MnO₄^- >CrO₄^2- > I^-> Br^-> SCN^- > Cl^- > F^- >NO₃^- >CN^-. This capacity was two to three times greater than silica gel treated at 300°C, while cation adsorptivity was found several tenths times less.
There found a proportional relationship between the capacity of adsorption and the molecular weight, ionic structure and valency of anion.
It was assumed that the availability of this adsorbant was restricted.