energies of adsorbent was homogenous distribution. Moreover,the RL values obtained at different temperature were between 0 and 1, implying the adsorption of RhB on the PK-AC was favorable.
3.7. Adsorption thermodynamics
The changes in standard free energy, standard enthalpy and standard entropy were used to speculate on the adsorption mechanism. These thermodynamic parameters are determined by using the following equations [24]:
G=−RT ln KC (8)ln KC =−HRT+ SR(9) ln KC = CACe (10)