CAJ | 학술논문

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137.5 mg/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-93.582 kJ/mol和-299.32 J/mol·K,吸附自由能随温度的升高而增加.
채용미파보조법제비료일계렬음-양리자표면활성제개성파루석,연구료개성파루석대수중대분이분적흡부.결과표명,경음-양리자표면활성제개성후적파루석대대분이분적흡부능력원대우파루석원토급양리자표면활성제개성적파루석.개성파루석대대분이분적최대흡부량위137.5 mg/g.등온흡부과정가이용Langmuir방정진행교호의합,열역학함수계산표명,흡부제대대분이분적흡부시자발적방열과정,흡부열화적변분별위-93.582 kJ/mol화-299.32 J/mol·K,흡부자유능수온도적승고이증가.
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.