Thermodynamics Study of Adsorption of Oil Hydrocarbons from aqueous solutions onto the Porcelanite Surface

Abstract

    This work describes removal of hydrocarbons from aqueous solution using porcelanite as an adsorbent surface with investigation of  some factors that affect on adsorption process of the hydrocarbons such as  contact time, primary hydrocarbons concentration in the solution, adsorbent particle size and temperature of the solution. Removal of hydrocarbons was conducted using  the batch method. From the obtained results, it was found that, the quantity of adsorbed  hydrocarbons was  increased with   increase in adsorption temperature .Equilibrium time was attained at 30min for efficient removal of hydrocarbons. Removal percentage of  hydrocarbons over  porcelanite powder was found to be 41.61% and the amount of adsorbed hydrocarbons over porcelanite was  83.22(mg/g). The results of    adsorption processes were more fitted   with   Friendlich model rather  than   Langmuir adsorption model. Thermodynamic study showed that,  ΔH was endothermic, ΔG at the values were negative at lower concentrations and then turned positive when concentrations increased and  ΔS was found to be positive.