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Structural analysis of zeolite NaA synthesized by a cost-effective hydrothermal method using kaolin and its use as water softener

Author:
Loiola, A.R., Andrade, J.C.R.A., Sasaki, J.M., da Silva, L.R.D.
Source:
Journal of colloid and interface science 2012 v.367 no.1 pp. 34-39
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy, X-ray diffraction, aluminum oxide, cost effectiveness, crystals, kaolin, particle size distribution, scanning electron microscopy, silica, zeolites
Abstract:
Zeolite 4A (LTA) has been successfully synthesized by a hydrothermal method, where kaolin was used as silica and alumina source. The synthesized zeolite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser granulometry, and FTIR spectroscopy. XRD data from the Rietveld refinement method confirmed only one crystallographic phase. Zeolite A morphology was observed by SEM analysis, and it showed well-defined crystals with slightly different sizes but with the same cubic shape. Particle size distribution of the crystals was confirmed by laser granulometry, whereas FTIR spectroscopy revealed significant structural differences between the starting material and the final zeolite product used as water softener.
Agid:
1007847