AB-8树脂吸附反式1,2-环己二醇热力学和动力学

CIESC Journal ›› 2012, Vol. 20 ›› Issue (2): 277-283.

AB-8树脂吸附反式1,2-环己二醇热力学和动力学

谢艳新¹, 侯丽丽², 杨倩³, 蒋登高¹

¹ College of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China ² Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China ³ Committee of Baoshan Circular Economy Industrial Agglomeration, Hebi 458030, China

收稿日期:2011-11-03 出版日期:2012-04-28 发布日期:2012-03-15

Adsorptive thermodynamic properties and kinetics of trans-1,2-cyclohexandiol onto AB-8 resin

XIE Yan-Xin¹, HOU Li-Li², YANG Qian³, JIANG Deng-Gao¹

¹ College of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China ² Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China ³ Committee of Baoshan Circular Economy Industrial Agglomeration, Hebi 458030, China

Received:2011-11-03 Online:2012-04-28 Published:2012-03-15

摘要/Abstract

摘要： AB-8 resin was used as an adsorbent for the removal of trans-1,2-cyclohexandiol (CHD) from aqueous solutions. Batch experiments were carried out to investigate the effect of contact time and temperature on sorption efficiency. The adsorptive thermodynamic properties and kinetics of CHD from water onto AB-8 resin were studied. The Langmuir and Freundlich isotherm models were employed to discuss the adsorption behavior. Thermodynamic parameters such as ΔG?, ΔH? and ΔS? were calculated. The results indicate that the equilibrium data are perfectly represented by Langmuir isotherm model. Thermodynamic study reveals that it is an exothermic process in nature and mainly physical adsorption enhanced by chemisorption with a decrease of entropy process. The kinetics of CHD adsorption is well described by the pseudo second-order model. The adsorbed CHD can be eluted from AB-8 resin by 5% ethanol aqueous solution with 100% elution percentage.

关键词: AB-8 resin, trans-1,2-cyclohexandiol, adsorption, isotherm, thermodynamics, kinetics

Abstract: AB-8 resin was used as an adsorbent for the removal of trans-1,2-cyclohexandiol (CHD) from aqueous solutions. Batch experiments were carried out to investigate the effect of contact time and temperature on sorption efficiency. The adsorptive thermodynamic properties and kinetics of CHD from water onto AB-8 resin were studied. The Langmuir and Freundlich isotherm models were employed to discuss the adsorption behavior. Thermodynamic parameters such as ΔG?, ΔH? and ΔS? were calculated. The results indicate that the equilibrium data are perfectly represented by Langmuir isotherm model. Thermodynamic study reveals that it is an exothermic process in nature and mainly physical adsorption enhanced by chemisorption with a decrease of entropy process. The kinetics of CHD adsorption is well described by the pseudo second-order model. The adsorbed CHD can be eluted from AB-8 resin by 5% ethanol aqueous solution with 100% elution percentage.

Key words: AB-8 resin, trans-1,2-cyclohexandiol, adsorption, isotherm, thermodynamics, kinetics

谢艳新, 侯丽丽, 杨倩, 蒋登高. AB-8树脂吸附反式1,2-环己二醇热力学和动力学[J]. CIESC Journal, 2012, 20(2): 277-283.

XIE Yan-Xin, HOU Li-Li, YANG Qian, JIANG Deng-Gao. Adsorptive thermodynamic properties and kinetics of trans-1,2-cyclohexandiol onto AB-8 resin[J]. , 2012, 20(2): 277-283.

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