Thermodynamic and Kinetic studies for sorption 4,6- dihydroxy mercuppyrimidine by granular Aluminum oxide

Abstract

The Kinetic and thermodynamic practical parameter affected adsorption process such as
initial compound concentration acidity.
Thermodynamic parameters, such as (ΔHº, ΔGº, ΔSº) have been calculated by using the
thermodynamic equilibrium coefficient obtained at different temperatures and concentrations
were(13.164KJ.mol-1,7.295KJ.mol-1,0.019695KJ.mol-1 K-1respectively).
The langmuir and freundlich adsorption model were applied to describe the equilib- rium
isotherms.
The adsorption kinetics of organic compound (DHMP) on the surface(GAO) obeyed the
pseudo -first order equation and show that the adsorption is complex due to different factors
that control the rate of reaction. In this work , the adsorption average constant (Kad) increase
with the temperature increase when fixing concentration for the adsortion substance.
Activation energy was calculated using Arrhenius equation which depends on the nature of
the adsorbent surface.