| 酚醛型吸附树脂吸附咖啡因的热力学研究 |
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| 引用本文： | 王重,史作清.酚醛型吸附树脂吸附咖啡因的热力学研究[J].离子交换与吸附,2003,19(1):23-30. |
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| 作者姓名： | 王重 史作清 |
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| 作者单位： | 1. 吸附与分离功能高分子材料国家重点实验室,南开大学高分子化学研究所,天津,300071;沈阳化工学院,沈阳,110021
2. 吸附与分离功能高分子材料国家重点实验室,南开大学高分子化学研究所,天津,300071 |
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| 基金项目： | 国家自然科学基金项目:(29974015) |
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| 摘 要： | 利用酚醛型吸附树脂JDW－2（自制）和DuoliteS-761对咖啡因的吸附进行了研究，在303－323K和研究的浓度范围内，JDW－2和DuoliteS-761对咖啡因吸附平衡数据符合Freundlich吸附等温方程。Freundlich吸附等温线和等量吸附焓表明：JDW－2和DuoliteS-761对咖啡因吸附是放热过程，我们对咖啡因在JDW－2和DuoliteS-761上的吸附焓，自由能，吸附熵也作了测试，并对吸附行为作了合理解释。
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| 关 键 词： | 酚醛型吸附树脂 吸附 咖啡因 |
| 文章编号： | 1001-5493(2003)01-0023-08 |
| 修稿时间： | 2002年10月14 |
THE THERMODYNAMIC STUDY OF ADSORPTION OF CAFFEINE ON PHENOLIC RESIN ADSORBENTS |
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| WANG Zhong, SHI Zuoqing State Key Laboratory of Functional Polymer Materials for Adsorption and Separation.THE THERMODYNAMIC STUDY OF ADSORPTION OF CAFFEINE ON PHENOLIC RESIN ADSORBENTS[J].Ion Exchange and Adsorption,2003,19(1):23-30. |
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| Authors: | WANG Zhong SHI Zuoqing State Key Laboratory of Functional Polymer Materials for Adsorption and Separation |
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| Institution: | WANG Zhong1,2 SHI Zuoqing2 1 State Key Laboratory of Functional Polymer Materials for Adsorption and Separation,Institute of Polymer Chemistry,Nankai University,Tianjin,300071 2 Shenyang College of Chemical Technology,Shenyang,110021 |
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| Abstract: | The present work studied the sorption of caffeine using phenolic resin adsorbents: JDW-2 made by myself and Duolite S-761. Equilibrium data for the adsorption of caffeine from aqueous solutions by JDW-2 and Duolite S-761 adsorbents within temperature range of 303-323K and investigative concentration range had been obtained and were correlated with a Freundlich-type of isotherm equation. Freundlich adsorption isotherms and isosteric enthalpy of adsorption indicate that the process of adsorption of caffeine from aqueous solutions by JDW-2 and Duolite S-761 is an exothermic process. Estimations of the isosteric enthalpy of adsorption, free energy, and entropy of adsorption are reported and, the adsorption behaviors are reasonably interpreted. |
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| Keywords: | Phenolic resin sorbent Adsorption Caffeine Equilibrium adsorption Adsorption thermodynamic |
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