2種の酸化物,シリカとギブサイトに対する2価鉄,2価マンガンイオンの吸着

概要

論文の詳細を見る
Adsorptions of Fe(II) ion (Fe^2+) and Mn(II) ion (Mn^2+) on the variable charge materials, silica and gibbsite which have surface functional groups, Si-OH and Al-OH, were investigated as a function of the solution pH, in order to grasp behaviors of the two ions in soils. Adsorption of Fe^2+ on the both oxides occurred at lower solution pH range than that of Mn^2+ Thus, it showed that Fe^2+ had a stronger adsorptive affinity to the oxides than Mn^2+. Most of adsorbed Fe^2+ and Mn^2+ on the oxides could not be desorbed by an ion-exchange reaction with MgCl_2. Adsorption-pH curves of the both ions were apparently different from that of Ca^2+. The both ions were adsorbed on the oxides at higher pH range than Cu^2+. These results implied that these two ions, Fe^2+ and Mn^2+ were specifically sorbed on the oxides, forming inner-sphere complexes.
日本粘土学会の論文
2002-12-31