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Journal > Indonesian Journal of Chemistry > STUDY OF THERMAL AND ACID STABILITY OF BENTONITE CLAY

 

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Indonesian Journal of Chemistry
Vol 2, No 1 (2002)
STUDY OF THERMAL AND ACID STABILITY OF BENTONITE CLAY
Wijaya, Karna ( Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta)
Pratiwi, Ani Setyo ( Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta)
Sudiono, Sri ( Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta)
Nurahmi, Emi ( Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta)
Article Info   ABSTRACT
Published date:
05 Jun 2010
 
The thermal and acid stability of the bentonite clays (Na- and Ca-bentonite) have been tested. The thermal stability testing has been carried out by heating 5 gram of the clays  for five hours at 200, 300 and 500 °C respectively, meanwhile acid stability testing was performed by immersing 5 gram clays into 100 mL sulphuric acid 1M, 2M and 3M for 24 hours. The tested clays, then were characterized by means of X-Ray difractometry and IR-spectroscopy methods. The characterization results showed that upon heating, both Ca- and Na-bentonites indicated same thermal stability. However, upon acid treatment, Na-bentonite was found relatively stabiler and more resistance then Ca-bentonite.   Keywords: bentonite, clay, thermal stability, acid stability.
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