Interaction of Montmorillonite Clay and Trace Element Cations.  Dissociation of Co2+, Ni2+ and Mn2+ Ions from the Respective  Clays at Different Degrees of Saturation

A significant correlation has been shown to exist between the pH of the medium and the amounts of 'free' Co²⁺ and Ni²⁺ ions in Co-H- and Ni-H-clay suspensions. The regression analysis yields the equation .Y^,=.14.232-2.797 X, where Y is the amount of Co²⁺ or Ni²⁺ in m.e./100g. and X is the pH with a correlation coefficient of 0.7602, signifleant at 0.1% level.