文献类型：期刊文献

英文题名：Different ionic liquid modified hypercrosslinked polystyrene resin for purification of catechins from aqueous solution

作者：Pei, Dong[1,2,3];Wu, Xiaoyu[1,2];Liu, Yi[1,2,3];Huo, Ting[1,2];Di, Duolong[1,2,3];Guo, Mei[4];Zhao, Lei[4];Wang, Bingpeng[4]

第一作者：Pei, Dong

通信作者：Di, DL[1];Di, DL[2]

机构：[1]Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China;[2]Chinese Acad Sci, Key Lab Nat Med Gansu Prov, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China;[3]Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Resource Chem & New Mat, Qingdao 266100, Peoples R China;[4]Gansu Univ Chinese Med, Key Lab Chem & Qual Tradit Chinese Med Coll Gansu, 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;[2]corresponding author), Chinese Acad Sci, Key Lab Nat Med Gansu Prov, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China.

年份：2016

卷号：509

起止页码：158

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

收录：;EI(收录号：20164102883688);Scopus(收录号：2-s2.0-84989830142);WOS:【SCI-EXPANDED(收录号:WOS:000385472000020)】；

基金：The author gratefully acknowledges the support of the National Natural Science Foundation of China (NSFC, no. 21374128 and 21544013) and the National High Technol-ogy Research and Development Program of China (863 No. 2014AA022203).

语种：英文

外文关键词：Hypercrosslinked; Ionic liquid; Adsorption mechanism; Catechin

摘要：A series of different ionic liquid modified hypercrosslinked polystyrene resins were prepared and evaluated for their adsorption properties where benzimidazole modified hypercrosslinked polystyrene resins exhibited best selectivity against catechins comparison with others ionic liquid modified hypercrosslinked resins and commercial resins. The maximum adsorption capacity of Benzimidazole/Hyper are up to 75.3 mg/g for (-)-epigallocatechin gallate and 101.7 mg/g for (-)-epicatechin. The pseudo second-order kinetic equation and intra-particle diffusion model could describe the entire adsorption process of (-)-epigallocatechin gallate and (-)-epicatechin onto ionic liquid modified hypercrosslinked resins. Isothermal equilibrium curves showed a good fitness with the Langmuir and Freundlich models. Evaluated thermodynamic parameters revealed that adsorption was spontaneous and endothermic. The results from the sequential adsorption-desorption cycles showed that Benzimidazole/Hyper resins held good desorption and reusability. The adsorption mechanism was indicated to be the synergistic effect of molecular sieving effect, multiple adsorption interactions and specific surface area. In addition, the steric hindrance of ionic liquid functional group in the hypercrosslinked polymeric resins was a crucial factor for the order of the adsorption capacity. (C) 2016 Elsevier B.V. All rights reserved.