Abstract: Anion-cation surfactant modified palygorskite were prepared by adopting microwave assistant. The sorption property of modified palygorskite for hydroquinone in water was studied. Comparing to natural palygorskite and cation surfactant modified palygorskite, ability of adsorption of anion-cation surfactant modified palygorskite is higher in the treatment of hydroquinone. The maximum sorption capacity was 137.50 mg/g.The adsorption equilibrium is in accordance with the Langmuir isothermal adsorption equations. Thermodynamic function calculated shows that the adsorption is a spontaneous and exothermic process. Enthalpy and entropy change of the adsorption of hydroquinone are -93.582 kJ/mol and -299.32 J/(mol·K), respectively. Free energy of the adsorption increases with the increase of temperature.

Key words: modified palygorskite%hydroquinone%adsorption%isothermal adsorption equation%thermodynamics