Résumé:
The objective of this study is the removal of methylorange by commercial bentonite using
adsorption processus. The influence of certain parameters such as contact time, adsorbent
amount, pH of the medium, adsorbate initial concentration and temperature were studied. The
results obtained show that the maximum adsorbedamountwasaround90 mg/g. The
experimental kinetic data are well described by the pseudo-first order model and the
adsorption isotherms by the Freundlich model. The thermodynamic studies showed that the
adsorption processus is spontaneous, exothermic and physical.
