Study of ions exchanges during the adsorption of La3+ ions onto montmorillonite K10
Keywords:
montmorilloniteK10;, adsorption, on exchange, thermodynamic parametersAbstract
The kinetic of adsorption of La3+ ions onto montmorillonite K10 was carried out at 25°C. The adsorption isotherm and
the ion exchange with clay were studied to determine the adsorption mechanism. The effect of temperature on the
maximum adsorption capacity has been measured. We have used X-ray diffractograms to establish a relationship between
the structure of clay and the improvement of its adsorption capacity. The thermodynamic adsorption parameters (Δ
G, Δ
H
and Δ
S) were calculated from measurements of the quantities of La3+ ions adsorbed at different temperatures. These
parameters were calculated between 11 and 110°C to understand the effect of temperature on the adsorption process