Sorption of Zinc Ion on Montmorillonite

The Quantity of Zinc and Calcium Ions in the Process Zn2+/ Ca-Montmorillonite and the Equilibrium pH of the Solution, the Difference Between the Quantities of Zinc Entering and Calcium Ions Leaving the Montmorillonite Phase, and the Quantity of Dissolved Hydrogen Ions 

105 lnitial Zinc Ion Concentration 107 Quantity of Entering Zinc Ions 107 Quantity of Leaving Calcium Ions Equilibrium W (Lnir 107 Quantity of Dissolved Hydrogen 

The exchange of zinc and hydrogen ions the data in Table 2.5 show a low contribution. 

The exchange of monovalent complexes of zinc ions it can be excluded by thermodynamic calculations. At pH 6, an insignificant portion ( 0.1) of zinc ions is present as ZnOH+ complexes (Pourbaix 1966). Neither can other anionic complexes be present in the applied concentration ranges (Horne et al. 1957). 

The formation of zinc polycations no polycations are present in the solution (Matijevic et al. 1962). 

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