Mechanochemical adsorption of phenol by TOT swelling clay minerals. II. Simultaneous DTA and TG study

Dalia Ovadyahu*, S. Yariv, I. Lapides, Y. Deutsch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The mechanochemical adsorption of phenol by laponite, saponite, montmorillonite, beidellite and vermiculite was studied by simultaneous DTA and TG analysis. Fitting of the DTA curves showed four endothermic peaks in the r.t. -250 °C temperature range. The first peak represents the melting of the excess crystalline phenol. The second peak represents the evolution of water. The third peak represents the boiling of the free phenol. The fourth peak represents the evolution of adsorbed phenol. In the DTA curves of montmorillonite the fourth peak is not observed as a separate peak but as part of the third peak. Laponite, saponite and montmorillonite show a very small exothermic effect which follows the endothermic events. Laponite adsorbs the greatest amounts of phenol and shows a strong exothermic peak at 390 °C. None of the other clays show this exothermic effect at this temperature.

Original languageEnglish
Pages (from-to)431-447
Number of pages17
JournalJournal of Thermal Analysis and Calorimetry
Volume51
Issue number2
DOIs
StatePublished - 1998

Fingerprint

Dive into the research topics of 'Mechanochemical adsorption of phenol by TOT swelling clay minerals. II. Simultaneous DTA and TG study'. Together they form a unique fingerprint.

Cite this