Hydrothermal and thermal treatment of natural clinoptilolite zeolite from Bigadi double dagger, Turkey: An experimental study

BAL AKKOCA D., YILGIN M., Ural M., Akcin H., Mergen A.

GEOCHEMISTRY INTERNATIONAL, cilt.51, ss.495-504, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 51 Konu: 6
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1134/s0016702913040022
  • Sayfa Sayıları: ss.495-504


The clinoptilolite rich zeolite from Bigadi double dagger which was formed from alteration of volcanic glass were treated with acidic (HCl, H3BO3, H3PO4), alkaline (KOH, NaOH) solutions. Hydrothermally treated and untreated samples were heat treated at 400, 550 and 700A degrees C. XRD, ICP-MS and N-2 gas adsorption were used for physicochemical characterization of zeolites. Considering the Si/Al > 4 and Na+K/Ca+Mg < 1 ratios, zeolite sample is included to earth alkali clinoptilolite class (Heu II) which is also revealed by thermal treatments. Since zeolite structure contains low alkalies it was at collapsed 550A degrees C.