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, cilt.33, ss.233-245, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 33 Konu: 4
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1080/08827508.2011.562952
  • Dergi Adı: MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
  • Sayfa Sayıları: ss.233-245

Özet

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.