【摘要】 采用微波辅助法制备了一系列阴-阳离子表面活性剂改性坡缕石,研究了改性坡缕石对水中对苯二酚的吸附。结果表明,经阴-阳离子表面活性剂改性后的坡缕石对对苯二酚的吸附能力远大于坡缕石原土及阳离子表面活性剂改性的坡缕石。改性坡缕石对对苯二酚的最大吸附量为137.5mg/g。等温吸附过程可以用Langmuir方程进行较好拟合,热力学函数计算表明,吸附剂对对苯二酚的吸附是自发的放热过程,吸附热和熵变分别为-93.582kJ/mol和-299.32J/mol.K,吸附自由能随温度的升高而增加。更多还原

【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.更多还原