4种化学修饰的吸附树脂对水溶液中邻甲酚的吸附行为  

ADSORPTION OF o-CRESOL ON MODIFIED ADSORPTIVE RESINS

作　　者：吴秀红[1] 陶为华[1] 陈建[1] 费正皓[1] 

机构地区：[1]江苏省滩涂生物资源与环境保护重点建设实验室,盐城师范学院,盐城224002

出　　处：《离子交换与吸附》2014年第6期526-533,共8页Ion Exchange and Adsorption

基　　金：国家自然科学基金资助项目(21307103);江苏省自然科学基金项目(BK2012673);江苏省高校自然科学研究计划项(12KJB610006);江苏省滩涂生物资源与环境保护重点建设实验室开放项目(JLCBE12030);盐城师范学院自然科学研究项目(12YCKL004)

摘　　要：分别以脯氨酸、L-谷氨酸、乙酰苯胺和水杨酸修饰的吸附树脂为吸附剂,邻甲酚为吸附质,在288K,303K和318K下的水溶液中进行静态吸附实验和脱附实验,考察树脂的吸附性能及吸附行为。实验结果表明,在4种经化学修饰的吸附树脂对邻甲酚的吸附过程中,降低温度有利于吸附;4种化学修饰的树脂对邻甲酚的吸附等温线均符合Freundlich模型,脱附率均大于85%,循环使用效果较好;在相同条件下,脯氨酸修饰的树脂和L-谷氨酸修饰的树脂对邻甲酚吸附性能更优异。热力学研究表明,4种树脂对邻甲酚的吸附过程均为自发的放热过程。Adsorption of o-cresol with adsorptive resins, which were modified by proline, glutamic acid, antifebrin and salicylic acid, respectively, was studied by static equilibrium adsorption at different temperature （288K, 303K, 318K）, and then desorpfion at 288K. The results showed that the adsorption of o-cresol on the four types of resins was physical adsorption and lower temperature was favorable to the process. Among four types of resins, the resins modified with proline （ZHP02） and glutamic acid （ZHL02） had better adsorptive performance. The adsorption isotherms of o-cresol absorbed on resins could be well described with Freundlich model. The desorption efficiency was more than 85% with methanol as desorptive agent. The adsorbents could be effectively regenerated and reused for adsorption of o-cresol. The thermodynamic data （AG〈0, /xH〈0 and AS〈0） indicated that the adsorption of o-cresol with four types of modified resins was a spontaneously enthalpy-driven process with entropy decreasing.

关 键 词：吸附树脂 邻甲酚 物理吸附 吸附热力学 

分 类 号：O647.31[理学—物理化学]