Phenol Adsorption Mechanism of Organically Modified Bentonite and Its Microstructural Changes

Bentonite was modified with cetyltrimethylammonium bromide (CTAB). The organically bentonite (OMB) used to remove phenol from aqueous solution, the microstructural changes were characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM), adsorption kinetic obtained using batch test results. results indicated that rate of onto OMB positively correlated initial concentration, maximum capacity found be 10.1 mg/g at concentration 150 mg/L 25 °C pH 10. investigations kinetics models showed better reflected pseudo-second-order model. Furthermore, properties samples different times SEM XRD. statistic analysis revealed pore diameter decreased increasing time gradually reached equilibrium.