INTERACTION OF SODIUM IONS WITH FELDSPAR SURFACES AND ITS EFFECT ON THE SELECTIVE SEPARATION OF Na- AND K-FELDSPARS

Gulgonul I., Karaguzel C., Cinar M., Çelik M. S.

MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, vol.33, no.4, pp.233-245, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 4
  • Publication Date: 2012
  • Doi Number: 10.1080/08827508.2011.562952
  • Journal Name: MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.233-245
  • Keywords: adsorption, froth flotation, Na-K feldspars, NaCl, selective separation, zeta potential, ALBITE DISSOLUTION KINETICS, AQUEOUS-SOLUTIONS, REACTION-RATES, FLOTATION SEPARATION, MONOVALENT SALTS, MINERALS, PH, 25-DEGREES-C, CONSTRAINTS, DEPENDENCE
  • Çanakkale Onsekiz Mart University Affiliated: No

Abstract

K-feldspar and Na-feldspar exhibit similar mineralogical, chemical and surface properties. Froth flotation is known to be the only technique to enable their separation. Our earlier studies revealed a good selectivity in the presence of K+ and to a larger extent with Na+ ions. In this context, in order to further identify the role of Na+ ions in the selective separation of these minerals, ion selective electrodes were employed to determine the released Na and K ions released from albite and microcline into the solution and those adsorbed ions onto the mineral surfaces. Adsorption isotherms in feldspars/inorganic systems were constructed and the regions representing ion exchange and ion adsorption isotherms delineated. The mechanism of selective separation was elaborated on the basis of micro-flotation, solubility, adsorption and zeta potential measurements.