This study was concerned with the adsorption of Toluene ,0·
nitro Toluene and 2,4.dinitro Toluene on The surface of kaolin clay.
The adsorption isotherms were of types( S3,S4 ) according to Giles classification and were in a good correlation with Freundlich equation in the range of cuncenlraliuns studied. The re5ult indicated that adsorption capacity increase with the increase of equilibrium concentration. The effect of the nwnber of substituted nitro groups in the adsorption extent of toluene was found to decrease in the following order:·
Toluene > 2,4-dinitro toluene > 0-nitro toluene
Adsorption on kaolin surface were examined as afunction of temperature in the range (298·328K) .1he extent of adsorption was found to increase with the increase in temperature (Endothennic).
Adsorption studies of Toluene on kaolin at different pH values
showed the following sequence:- pH 4 > 11 > 7
While for O·nitro toluene and 2,4-dinitro toluene showed the
following order:- pH 11 > 4> 7
