Adsorption behavior of strontium on binary mineral mixtures of Montmorillonite and Kaolinite


Başçetin E., Atun G.

APPLIED RADIATION AND ISOTOPES, cilt.64, ss.957-964, 2006 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 64 Konu: 8
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.apradiso.2006.03.008
  • Dergi Adı: APPLIED RADIATION AND ISOTOPES
  • Sayfa Sayıları: ss.957-964

Özet

The adsorption behavior of kaolinite and montmorillonite minerals and their mixtures in respect of Sr ion were studied by means of a batch method using Sr-90 as a radio tracer. The effect of several parameters such as temperature, pH, Sr concentration and supporting electrolyte were investigated. Experimentally measured distribution coefficients showed a good agreement to within 98.5-99.7% with theoretically calculated values. The values of adsorption capacity of adsorbents and mean adsorption energy of adsorption were calculated by fitting the adsorption data to Dubinin-Radushkevich isotherm. The adsorption capacity of clay mixtures decreased as kaolinite fractions increased. The mean adsorption energy values of 8.0-9.5 kJ mol(-1) showed that adsorption was governed by ion exchange. The Freundlich parameters were used to characterize a site distribution function for binary exchange between Sr and Na. (c) 2006 Elsevier Ltd. All rights reserved.