Thermodynamic and Kinetic studies for sorption 4,6- dihydroxy mercuppyrimidine

Abstract EN

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.