Conversion of South African clays into high quality zeolites

Nicholas M. Musyoka, Roland Missengue, Melissa Kusisakana, Leslie F. Petrik

Research output: Journal PublicationArticlepeer-review

47 Citations (Scopus)


Clays obtained from South Africa were used as feedstock materials for the synthesis of zeolites. The conventional alkaline hydrothermal treatment of the starting material (90. °C for 8. h) was preceded by a fusion step (550. °C for 1.5. h) to improve the solubility of aluminium and silicon. Various characterization techniques such as X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy were employed to probe the properties of the as-received clays as well as the resulting zeolitic phase. The synthesized zeolite X and hydroxy-sodalite were of high crystalline quality hence making clay materials a cheaper alternative for producing high quality zeolites.

Original languageEnglish
Pages (from-to)182-186
Number of pages5
JournalApplied Clay Science
Publication statusPublished - Aug 2014
Externally publishedYes


  • Bentonite
  • Hydrothermal
  • Recrystallization
  • White and red clay
  • Zeolite

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology


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