Adsorption of Anion and Cation Dyes onto Pillared Montmorillonite

作者：Butman M F^*; Ovchinnikov N L; Karasev N S; Kapinos A N; Belozerov A G; Kochkina N E

来源：Protection of Metals and Physical Chemistry of Surfaces, 2017, 53(4): 632-638.

DOI：10.1134/S2070205117020083

Al2O3- and Al(Ce)(2)O-3-pillared montmorillonite materials were synthesized using the intercalation of large-sized polyhydroxocomplexes of aluminum and aluminum/cerium in order to obtain adsorbents for removing the water-soluble anionic (acid red, AR) and cationic (methylene blue, MB) dyes. It was shown that the adsorption of dyes heavily depended upon the pH of the medium reaching a maximal adsorption capacity for AR at low pH and for MB at high pH. The distinction between the adsorption efficiencies for dyes observed in the materials with a different pillar structure was interpreted in the light of both the charge states (the.-potential) of tactoids in suspensions and texture properties of adsorbents investigated by small-angle X-ray diffraction and porosimetry. We used the classic models to describe adsorption: the kinetic pseudo-first-order and pseudo-second-order models and the equilibrium Langmuir and Freundlich equations.

• 出版日期2017-7