In this study, a Ca-montmorillonite was tested for its CIP adsorption
properties under ambient and controlled pH conditions. Cation
desorption from the montmorillonite during CIP uptake was quantified
to confirm the contribution of cation exchange interaction
on adsorption, which has been rarely reported in the literature. In
addition, the bonding between CIP and montmorillonite and the
effect of cation exchange interaction on the structure of montmorillonite
were examined through Fourier transform infrared (FTIR)
and X-ray diffraction (XRD) analyses, respectively.Apossible model
for the conformation of the exchanged CIP in montmorillonite was
thus proposed.