Removal of high-molecular-weight hexose alkaline degradation products by rosin-based anion adsorbent: Kinetics, thermodynamics, and mechanisms
Removal of high-molecular-weight hexose alkaline degradation products by rosin-based anion adsorbent: Kinetics, thermodynamics, and mechanisms
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DOI：
10.1016/j.foodcont.2022.109410
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发表时间：
2022-09
期刊：
影响因子：
6
通讯作者：
Wei Wei-Wei;Li Jiao;Weiyuan Li;Xiaosong Tang;Wenbo Xie;Haiqing Yu;Wen Li;Fuhou Lei
中科院分区：
文献类型：
--
作者：
Wei Wei-Wei;Li Jiao;Weiyuan Li;Xiaosong Tang;Wenbo Xie;Haiqing Yu;Wen Li;Fuhou Lei
甜菜汁中的黑色素（主要是高分子量己糖碱性降解产物，HHADP）对白色糖的质量有负面影响，因此应在加工过程中去除，例如，通过吸附。本研究开发了一种高效、可再生、绿色的松香基阴离子吸附剂（RAA），用于甜菜汁中HHADP的吸附脱色，其平衡吸附容量为6.50 mg/g，去除率为89.36%.吸附动力学、吸附等温线、吸附热力学和吸附机理的研究表明，该吸附是一个自发的吸热多层过程，主要是由RAA的质子化叔胺基团与HHADP的羧酸基团之间的相互作用驱动的化学吸附.我们的研究结果为重要工业过程（即甜菜糖生产）开发具有成本效益且实用的吸附剂铺平了道路。
The dark pigments of beet juice (mainlyhigh-molecular-weight hexose alkaline degradation products, HHADPs) negatively affect the quality of white sugar and should therefore be removed during processing, e.g., through adsorption. Herein, we developed a rosin-based anion adsorbent (RAA) as an effective, regenerable, and green decolorization agent for the removal of HHADPs from beet juice, achieving an equilibrium HHADP adsorption capacity of 6.50 mg/g and a removal efficiency of 89.36%. The investigations of adsorption kinetics, isotherms, thermodynamics, and mechanisms revealed that the adsorption was a spontaneous endothermic multilayer process and mainly corresponded to chemisorption driven by the interactions between the positively charged protonated tertiary amine groups of RAA and the negatively charged carboxylate groups of HHADPs. Our results pave the way to the development of cost-effective and practical adsorbents for an important industrial process, namely beet sugar production.