The adsorption of Na+ and Cl- ions from a mixed ethanol-water (1:1) solutio
n of NaCl at the hematite-electrolyte interface was studied. The presence o
f ethanol in alpha-Fe2O3-NaCl solution system has no significant effect on
the surface charge density versus pH relationship. On the other hand an inf
luence of ethanol on the zeta potential is greater and provokes the shift o
f iep from pH=8 in water solution to pH=9 in the mixed system. The adsorpti
on of Cl- ions from ethanol-aqueous solutions is greater and the adsorption
of Na+ ions is smaller than that from water solutions. (C) 1999 Elsevier S
cience B.V. All rights reserved.