دراسة حركية و ثرموديناميكية لبعض الأمينات على سطح الزيولايت

الملخص EN

This study is concerned with the Kinetic and Thermodynamic of adsorption in solution of Aniline, P-Tolidine and P-Nitro aniline on surface Zeolite.

In this work a U.V-Visible spectrophotometric technique has been used to study the adsorption isotherms; the result obtained that the adsorption isotherms of type S2andS3 according to Giles classification with Freundlich equation at the range of concentration.

The effect of introducing electron with drawing groups and electron donating groups which substituted in the aromatic ring to Aniline Compound on the adsorption process; the result showed that the derivatives of substituted nitro groups is less in adsorption capacity than substituted alkyl groups.Also the effect of temperature ranges (298-328)K on the adsorption of amino compounds, the results showed that the adsorption of amino compounds on Zeolite surface decreased with the increase of temperature which means that the adsorption process exothermic.

The results indicated also that the adsorption capacity of the adsorbent for the compound used increase in the following order : P-Toluidine > Aniline > P-Nitro aniline.

The effect of the acid function was also studied showing that the amino compounds have different effects with PH values, as follows: pH : 7 > 9 > 4.

The Kinetic study of these amino compounds were studied , when using deferent concentration of amino compounds solution on constant weights of surface , the adsorption average constant Kad increase when the compounds solution concentration are decrease ,also Kad increase with temperature increasing for all compound solution on the surface , and the activation energy increased with the increase of equilibrium concentration.