SO2 adsorption on acid-treated bentonites from Turkey

Sakizci M., Alver B. E., Yorukogullari E.

CLAY MINERALS, vol.46, no.1, pp.73-83, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 1
  • Publication Date: 2011
  • Doi Number: 10.1180/claymin.2011.046.1.73
  • Journal Name: CLAY MINERALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.73-83
  • Keywords: adsorption, bentonite, SO2, thermal analysis, X-ray diffraction, ACTIVATED MONTMORILLONITE CLAY, CATALYTIC-ACTIVITY, SURFACE-AREAS, MINERALS, REMOVAL, GASES
  • Anadolu University Affiliated: Yes

Abstract

The adsorption of sulphur dioxide (SO2) on two bentonites from Unye, Turkey (Kavaktepe and Yemislitepe deposits - denoted below as BK and BY) and on forms treated with 1 and 2 M HCl solutions was investigated. The bentonite samples were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), thermogravimetry (TG-DTG), differential thermal analysis (DTA) and nitrogen adsorption methods. Adsorption capacities of SO2 were obtained using a standard volumetric apparatus at 293 K and 106 kPa. The SO2 adsorption capacity of the BY-2 (1.263 mmol g(-1)) sample was much greater than the BK-2 (1.126 mmol g(-1)) sample. As the concentration of acid increased, the specific surface areas and the uptakes of SO2 gas increased.