Characterization and pillaring of a Turkish bentonite (Resadiye)

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

JOURNAL OF COLLOID AND INTERFACE SCIENCE, cilt.313, sa.1, ss.5-11, 2007 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 313 Sayı: 1
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.jcis.2007.02.086
  • Dergi Adı: JOURNAL OF COLLOID AND INTERFACE SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5-11
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Hayır

Özet

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.