Sorption and Catalytic Activity of Adsorbent-Catalyst Based on Montmorillonite Modified with Cr(III) and Cu(II) Mixed Oxides

The sorption properties of mixed adsorbent-catalyst based on high-silica zeolite and montmorillonite modified with mixed oxides of Cr(III) and Cu(II) with respect to organic compounds of various classes were studied, and the optimal dynamic conditions of its operation were determined.     

Sorption Concentration of Radiocesium on NaX Zeolite Modified with Cu2[Fe(CN)6]

Sorption of ¹³⁷Cs on NaX zeolite modified with Cu₂[Fe(CN)₆] was studied under dynamic conditions.     

Adsorption and Structural Properties of Montmorillonite Pillared by Cr(III) and Cr(III)–Cu(II) Hydroxocomplexes

The sorption and structural parameters and thermal stability of montmorillonite pillared by Cr(III) polyhydroxocomplexes and heteronuclear Cr(III)–Cu(II) polyhydroxocomplexes were investigated. It was shown that the introduction of intercalating Cr(III) and Cr(III)–Cu(II) agents into the montmorillonite increased the value of the first basal reflection (d ₀₀₁) up to 1.85 nm in the first case and up to 1.98 nm, in the second. The dependence of the values of d ₀₀₁and specific surface area on the OH^–/Cr³⁺ratio was found, which is retained during the calcination of the samples up to 500–800°C. The sorption ability of the prepared samples with respect to acetone, ethanol, benzene, toluene, and water was investigated.     

Sorption Characteristics of Pillared Ferruginous Montmorillonite Modified with Cetylpyridinium Bromide

The sorption capacity of pillared ferruginous montmorillonite modified with cetylpyridinium bromide for iodine, methylene blue, and phenol was studied. Procedures for preparing a modified sorbent with the optimal sorption power for phenol were developed.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 6, 2005, pp. 901–904.Original Russian Text Copyright © 2005 by Panasyugin, Kitikova, Bondareva, Sivak.     

Adsorption and Structural Properties of Montmorillonite Pillared with Hydroxocomplexes of Iron and Rare-Earth Metals

The sorption and structural parameters and the thermal stability are studied for montmorillonite pillared with Fe(III) polyhydroxocomplexes and mixed Fe(III)–Me(III) hydroxocomplexes, where Me = Ce, La, Y, or Ln. The dependence of the first basal reflection value d ₀₀₁ on the Fe/Me ratio is found. The d ₀₀₁ value is shown to be determined by the nature of the metal.     

Adsorption of Ammonia and Sulfur Dioxide by Sorbents Based on Modified Montmorillonite

The sorption properties of montmorillonite modified with Fe(III) and Al(III) polyhydroxo complexes and with Fe(III)-Zr(IV), Fe(II)-Ni(II), and Fe(III)-Al(III) heteronuclear polyhydroxo complexes with respect to ammonia and sulfur dioxide were examined.