固化单宁大孔吸附树脂的制备及吸附性能研究

林产化学与工业 ›› 2007, Vol. 27 ›› Issue (5): 67-72.

固化单宁大孔吸附树脂的制备及吸附性能研究

张力平¹, 刘建¹, 陈国伟¹, 秦竹²

1. 北京林业大学材料科学与技术学院, 北京 100083;2. 清华大学理学院, 北京 100084

收稿日期:2006-11-30 修回日期:1900-01-01 出版日期:2007-10-30 发布日期:2007-10-30

Preparation of Macroporous Adsorption Resin of Immobilized Tannins and Its Adsorption Behavior

ZHANG Li-ping¹, LIU Jian¹, CHEN Guo-wei¹, QIN Zhu²

1. Chemical Processing of Forest Products, Beijing Forestry University, Beijing 100083, China;2. School of Science, Tsinghua University, Beijing 100084, China

Received:2006-11-30 Revised:1900-01-01 Online:2007-10-30 Published:2007-10-30

摘要/Abstract

摘要： 利用Mannich反应将黑荆树单宁固定在氯甲基化聚苯乙烯树脂表面,成功地制备出一种新型固化单宁大孔吸附树脂(MARIT),并通过正交试验得出适宜的合成条件.苯酚在MARIT上的平衡吸附数据符合Freundlich吸附等温方程.利用热力学函数关系计算了等量吸附焓、吸附自由能和吸附熵,等量吸附焓在8.95～13.41 kJ/mol之间,推测吸附过程为氢键吸附.比较MARIT对苯酚的水溶液和环己烷溶液中苯酚的吸附性能,及对溶液中苯酚、间苯二酚和邻硝基苯酚的吸附性能,进一步讨论了MARIT对苯酚吸附时的氢键作用.

关键词: 单宁, 大孔吸附树脂, 吸附热力学, 吸附机理

Abstract: Using chloromethyl polystyrene resin as matrix, a new macroporous adsorption resin of immobilized black wattle tannins(MARIT) was prepared through Mannich reaction. The condition of reaction was determined by means of orthognonal experiment. Equilibrium data for the adsorption of phenol from aqueous solution by macroporous adsorption resin as adsorbent had been obtained which were correlated with Freundlich isotherm equation. Isosteric adsorption enthalpy, adsorption free energy and adsorption entropy were calculated according to the relationship of thermodynamic function. Isosteric adsorption enthalpy was 8.95-13.41 kJ/mol, which reveals a hydrogen-bonding adsorption mechanism. Difference of adsorption properties of phenol onto MARIT from aqueous solution and cyclohexane solution, as well as difference of adsorptions of phenol, resorcinol and o-nitrophenol from aqueous solution were studied, and the results further demonstrated the hydrogen-bonding based adsorption for phenol from non-aqueous solution.

Key words: tannin, macroporous adsorption resins, equilibrium adsorption, adsorption mechanism

中图分类号:

张力平;刘建;陈国伟;秦竹. 固化单宁大孔吸附树脂的制备及吸附性能研究[J]. 林产化学与工业, 2007, 27(5): 67-72.

ZHANG Li-ping;LIU Jian;CHEN Guo-wei;QIN Zhu. Preparation of Macroporous Adsorption Resin of Immobilized Tannins and Its Adsorption Behavior[J]. , 2007, 27(5): 67-72.

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