Behavior Adsorption Study of Phenol, Picric acid and p-Amino phenol By Powder Bentonite

Abstract

Adsorption studies for phenol , picric acid and p- Amino phenol removal from
aqueous solutions on bentonite 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 rang 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 with in 45 min of opration. 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.