Structural characterization of (Cu2+,Na+)-and Cu2+,NH+4)-Exchanged bentonites upon thermal treatment

Seiffarth, Torsten
Kaps, Christian

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Publication date

January 2009

DOI

10.1346/CCMN.2009.0570104

Publisher

Clay Minerals Society

Abstract

Bentonites are excellent materials for sequestering various metal cations because of the cation fixation ability of the constituent montmorillonite layers, but sometimes, such as in the case of Cu, the exact location of cation fixation with respect to the clay layers is difficult to determine. Namontmorillonite was prepared from the <2 μm fraction of the bentonite Calcigel (from Bavaria, Germany) and exchanged by Cu and Na or by Cu and NH cations. The resulting materials (bi-ionic Cu-Na and Cu-NH samples, respectively, as well as homo-ionic forms with Cu, Na and NH ) were heated for 24 h at temperatures of 300 and 450°C and the structural evolution characterized using X-ray diffraction (XRD) analysis, Fourier Transform Infrared (FTIR) spect...

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Structural characterization of (Cu2+,Na+)-and Cu2+,NH+4)-Exchanged bentonites upon thermal treatment

Abstract

Extracted data

Structural characterization of (Cu2+,Na+)-and Cu2+,NH+4)-Exchanged bentonites upon thermal treatment

Abstract

Extracted data

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