Characterization and pillaring of a Turkish bentonite (Resadiye)


Tabak A., Afsin B., Caglar B., Koksal E.

JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol.313, no.1, pp.5-11, 2007 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 313 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.1016/j.jcis.2007.02.086
  • Title of Journal : JOURNAL OF COLLOID AND INTERFACE SCIENCE
  • Page Numbers: pp.5-11

Abstract

The shifts of the Si-O-Si stretching and the Si-O-Al and Si-O-Si bending modes, as well as the free silica peak in the IR spectra and the strengthening of the XRD reflections due to the quartz and alpha-cristobalite components of the Al-pillared bentonites (Wyoming and Resadiye), are ascribed to the formation of new Si-O-Al groups of covalent character. The mass losses in the temperature range 150-700 degrees C correspond to the dehydration and dehydroxylation processes. The total mass losses of the Al-pillared bentonites (Wyoming and Resadiye) are close to each other at an OH/Al ratio of 2.2, but calcination from 400 to 600 degrees C causes the surface area of the latter composite to decrease by 13%. (c) 2007 Elsevier Inc. All rights reserved.