文献类型：期刊文献

英文题名：Multiple interactions on macroporous adsorption resins modified with ionic liquid

作者：Wu, Xiaoyu[1,2,3];Liu, Yi[1,2,4];Huo, Ting[5];Chen, Zhenbin[5];Liu, Yongfeng[1,2,4];Di, Duolong[1,2,4];Guo, Mei[6];Zhao, Lei[7]

第一作者：Wu, Xiaoyu

通信作者：Di, DL[1]

机构：[1]Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China;[2]Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Nat Med Gansu Prov, Lanzhou 730000, Peoples R China;[3]Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China;[4]Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Resource Chem & New Mat, Qingdao 266100, Peoples R China;[5]Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China;[6]Gansu Coll Tradit Chinese Med, Dept Pharm, Lanzhou 730000, Peoples R China;[7]Gansu Coll Tradit Chinese Med, Coll Gansu Prov, Key Lab Chem & Qual Tradit Chinese Med, Lanzhou 730000, Peoples R China

第一机构：Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China

通信机构：[1]corresponding author), Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China.

年份：2015

卷号：487

起止页码：35

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20154101376925);Scopus(收录号：2-s2.0-84943552298);WOS:【SCI-EXPANDED(收录号:WOS:000365360000005)】；

基金：The authors express their thanks for the support of the National Natural Science Foundation of China (NSFC, no. 21374128) and the "Hundred Talents Program" of the Chinese Academy of Sciences.

语种：英文

外文关键词：Macroporous adsorption resins; Equilibrium isotherms; Kinetics; Dynamics; Multiple interactions

摘要：A comparative adsorption study was conducted on (-)-epigallocatechin gallate and (-)-epicatechin onto AB-8, chloromethyl/macroporous adsorption resin (chloromethyl/MAR), and ionic liquid/macroporous adsorption resin (ionic liquid/MAR) developed by our group. Equilibrium adsorption data showed that adsorption capacities of ionic liquid/MAR were superior to those of AB-8 and chloromethyl/MAR under the same conditions. Adsorption isotherms could be properly described by Langmuir isotherm, whereas adsorption kinetics curves obeyed pseudo-second-order model. Evaluated thermodynamic parameters revealed that adsorption was spontaneous and exothermic. The dynamic adsorption capacity of (-)-epigallocatechin gallate anionic liquid/MAR at 298 K was approximately 72.5 mg/g dry resin. The resin column can be effectively regenerated using methanol. Analysis of adsorption mechanism suggested that it's the large adsorption capacity was due to multiple adsorption interactions. Considering the excellent adsorption performance of ionic liquid/MAR, it has promising potential for the large-scale preliminary separation and purification of EGCG from tea extracts. (C) 2015 Elsevier B.V. All rights reserved.