Applying zeta potential measurements to characterize the adsorption on montmorillonite of organic cations as monomers, micelles, or polymers.

摘要: Abstract A systematic study was carried out to characterize the adsorption of organic cations as monomers, micelles, or polymers on montmorillonite by monitoring zeta potential ( ξ ) a function cation loading clay. In general, clay’s became less negative increased. fairly good linear correlation between clay, up exchange capacity (CEC) and composites fitted. However, when larger exceeded CEC, nonlinear increase in measured. The degree this corresponds size affinity clay (in order surfactant  reached zero at polycation loadings that were significantly lower than CEC. zeta-adsorption plot polycations well-defined plateau which correlates polycations. effect electrolytes crude monitored, expected, extent increased with valency (Na + 2+ 3+ intrinsic radius ); however, an unexpected anion observed.