Adsorption study of some derivatives of phenols on activatedalumina in aqueous solution

Abstract

The adsorption isotherms for five derivatives of phenol from aqueous solution onto a
surface of activated AL2O3 has been determined at 22°, 35° and 45°. The calculation showed
that these isotherms adopting langmuir equation rather than freundlich. Increasing
temperature lead to an effect on reducing amount of adsorbate without changing the pattern of
the isotherms.
This means that the mechanism is exothermic for all Investigated phenols. In this work
the values of +G was determined at 22°C and 35°C except for n-Nitro phenol at temperature
45° was used.