Physicochemical characterisation of natural K-clinoptilolite and heavy-metal forms from Gordes (Manisa, western Turkey)

ÜNALDI T., Mizrak I., KADİR S.

JOURNAL OF MOLECULAR STRUCTURE, vol.1054, pp.349-358, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1054
  • Publication Date: 2013
  • Doi Number: 10.1016/j.molstruc.2013.09.048
  • Journal Name: JOURNAL OF MOLECULAR STRUCTURE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.349-358
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

Physicochemical characterisation of natural K-clinoptilolite and heavy-metal (Ag+, Cd2+, Cr3+ and Co3+) forms was accomplished through ion exchange by batch, X-ray diffractometric (XRD), X-ray fluorescence (XRF), infrared-spectral (FT-IR), differential thermal analysis-thermal gravimetric (DTA-TG) and scanning-electron microscopic (SEM) methods. Increasing the normality in the cases of heavy-metal forms resulted in decrease in crystallinity and increases in unit-cell volume, rate of ion exchange, and percentage of ion selectivity. In this study, the order of ion-selectivity percentages (rather than ion selectivity) of heavy-metal forms was determined to be Ag+ > Cd2+ > Cr3+ > Co3+. This finding is consistent with the results of worldwide research on the order of ion selectivity in modified clinoptilolite. (C) 2013 Elsevier B.V. All rights reserved.