PPT Slide
Basic Model Describing Cation Adsorption on a Hydrophilic Si Surface:
surface Si-O- as reactive sites interacting with H+ and/or Mn+ cations in aqueous solution
Si-O- (s) + H+ (aq) <=> Si-OH
Si-O- (s) + Mn+ (aq) <=> Si-OM(n-1)+
surface hydroxyl groups act as ion exchange centers
Lowenstein et al, Solid State Phenom. 65-66 (1999)