Behavior adsorption study of phenol, picric acid and p-amino phenol by powder bentonite

الملخص EN

Adsorption studies for phenol, picric acid and p-Amino phenol removal from aqueous solutions on betonies were carried out.

Batch kinetic and isotherm studies were carried out under varying experimental conditions at contact time, initial phenol picric acid and p-Amino phenol concentration, adsorbent dose and pH.

The adsorption data fitted the Langmuir and Freundlich isotherms equations in the whole range of concentrations studied.

The adsorption capacity of compounds was higher (12.22-27.26 mg.g-1) with the lower values of the temperature (18-48Cº), higher values of the initial pH (3, 10) and agitation rate (180rpm).

The equilibrium in the solution was observed within 45 min of operation.

The equilibrium isotherm for each compound was determined to describe the adsorption processes.

The results obtained shows the isotherms were (S3, L3) according to Giles classification.

The thermodynamic parameters at compounds such as ΔG, ΔH, ΔS of adsorption were calculated.