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. (C) 2010 Elsevier Inc. All rights reserved.
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