Fig. 6. Equilibrium adsorption of phenol from water, onto: (a) T100, B100 and BP100, all at 296 K, and (b) BP100 at 281, 296, and 313 K. The isotherms (solid lines) represent non-linear curvefits using the Langmuir model (eqn (1)). (c) Van't Hoff plot for determination of adsorption enthalpy.