文献类型：期刊文献

英文题名：Adsorption behaviors and kinetics studies of chitooligosaccharides with specific degree of polymerization on a novel ion-exchange resin

作者：Hou, Yanying[1];Liu, Lujie[1];He, Qiaole[1];Zhang, Di[1];Jin, Jiayang[1,2];Jiang, Banghe[2];Zhao, Liming[1,2]

机构：[1]East China Univ Sci & Technol, Sch Biotechnol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Shanghai Collaborat Innovat Ctr Biomfg Technol SC, Shanghai 200237, Peoples R China

年份：2022

卷号：430

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20214111007398);WOS:【SCI-EXPANDED(收录号:WOS:000722563200003)】；

语种：英文

外文关键词：Chitooligosaccharides; Ion exchange resin; Adsorption

摘要：Physiological activities of chitooligosaccharides (COSs) are related to their intrinsic structure and purities of products. However, the efficient preparation method of COSs with a specific degree of polymerization (DP) is still lacking, which limits the in-depth research and application of COSs. This work focused on the adsorption characters of COSs on the ion-exchange resin. Static adsorption experiments were conducted to study the effects of initial solution pH and ionic strength on the adsorption behaviors of chitobiose, chitotriose, chitotetraose, chitopentaose, and chitohexaose (COS 2-6). The adsorption equilibrium, thermodynamics, and kinetics of adsorption were investigated, and the molecular dynamics method was used to calculate the interaction energy of COS 2-6 with the resin and the diffusion coefficients of COS 2-6 in solution. The results show that the adsorption equilibrium data of COS 2-6 are satisfied with the Langmuir model, while the adsorption equilibrium capacities decrease with the increase of COSs DP. The COS 2-6 adsorption kinetic data are well fitted to the pseudo-second-order kinetic model. Liquid-film diffusion and intra-practical diffusion are both the adsorption rate-limiting steps. Thermodynamic parameters show that the adsorptions of COS 2-6 on HX-7 resin are spontaneous and feasible. With the increase of DP, the diffusion coefficients of COS 2-6 in solution decrease while the interaction force with resin become stronger, thus leading to more favorable adsorption.