Investigation of clinoptilolite rich natural zeolites from Turkey: a combined XRF, TG/DTG, DTA and DSC study

ERDOĞAN ALVER B., SAKIZCI M., YÖRÜKOĞULLARI E.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, vol.100, no.1, pp.19-26, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 100 Issue: 1
  • Publication Date: 2010
  • Doi Number: 10.1007/s10973-009-0118-0
  • Journal Name: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.19-26
  • Keywords: Clinoptilolite, Dehydration, Natural zeolites, Thermal analysis, Turkey, CRYSTAL X-RAY, EXCHANGED CLINOPTILOLITE, THERMAL-STABILITY, HEULANDITE, DEHYDRATION, ADSORPTION, MECHANISM, BEHAVIOR, 100-K, AREA
  • Anadolu University Affiliated: Yes

Abstract

Turkey clinoptilolite-rich tuffs from Gordes and Bigadi double dagger regions of western of Anatolia and their exchanged forms (K(+), Na(+), Mg(2+) and Ca(2+)) were characterized by TG/DTG-DTA, DSC and XRF methods and the surface areas were also determined for both tuffs. TG-DTG and DTA curves of all clinoptilolite samples were measured in the temperature range 30-1000 A degrees C. All clinoptilolite samples had major, rapid mass losses between 30 and 200 A degrees C, with slower and less significant mass losses at higher temperatures. The mass loss of the Natural-G is 9.54% while that of the Natural-B sample is 10.50%. Water content increases in the order of K < Na < Ca < Mg for Bigadi double dagger clinoptilolite samples and in the following sequence K < Na < Mg < Ca for Gordes clinoptilolite samples. One mass loss step for all clinoptilolite samples was observed using differential scanning calorimeter (DSC) in the range of 30-550 A degrees C.