pH-Independent and pH-Dependent Surface Charges on Kaolinite

@article{Bolland1980pHIndependentAP,
  title={pH-Independent and pH-Dependent Surface Charges on Kaolinite},
  author={Michael D A Bolland and Alan M. Posner and J. p. Quirk},
  journal={Clays and Clay Minerals},
  year={1980},
  volume={28},
  pages={412-418}
}
Model cation-exchange curves are presented for an idealized kaolinite surface where the charge on the surface (1) has its origin in cation substitution in the structure, and hence, is pH independent; and (2) is produced by protonation/deprotonation reactions of oxide-like sites, and hence, depends on the acid and base strengths of the surface sites, as well as the ionic strength. Two pH-independent situations are considered: one where the exchanging ions have no selectivity for the surface and… 

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