Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption Resin
The separation and preparation of theasinensins have been hot spots in the field of tea chemistry in recent years. However, information about the mechanism of efficient adsorption of tea theasinensins by resin has been limited. In this study, the adsorption equilibrium and thermodynamics of tea thea...
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MDPI AG
2021-12-01
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| Series: | Foods |
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| author | Jianyong Zhang Hongchun Cui Jinjin Xue Wei Wang Weiwei Wang Ting Le Lin Chen Ulrich H. Engelhardt Heyuan Jiang |
| author_facet | Jianyong Zhang Hongchun Cui Jinjin Xue Wei Wang Weiwei Wang Ting Le Lin Chen Ulrich H. Engelhardt Heyuan Jiang |
| author_sort | Jianyong Zhang |
| collection | DOAJ |
| description | The separation and preparation of theasinensins have been hot spots in the field of tea chemistry in recent years. However, information about the mechanism of efficient adsorption of tea theasinensins by resin has been limited. In this study, the adsorption equilibrium and thermodynamics of tea theasinensins by a high-efficiency macroporous adsorption HP20 resin were evaluated. The adsorption of theasinensin A, theasinensin B, and theasinensin C on HP20 resin were spontaneous physical reaction processes. Adsorption processes were exothermic processes, and lowering the temperature was beneficial to the adsorption. The Freundlich model was more suitable to describe the adsorption of tea theasinensins. The adsorption equilibrium constant and maximum adsorption capacity of theasinensin A were significantly higher than theasinensin B and theasinensin C, which indicated that the adsorption affinity of theasinensin A was stronger than that of theasinensin B and theasinensin C. The phenolic hydroxyl groups and intramolecular hydrogen bonds of theasinensin A were more than those of theasinensin B and theasinensin C, which might be the key to the resin’s higher adsorption capacity for theasinensin A. The HP20 resin was very suitable for efficient adsorption of theasinensin A. |
| first_indexed | 2024-03-10T04:08:11Z |
| format | Article |
| id | doaj.art-5bcb4bde7f15446ead0ba8a200e105c6 |
| institution | Directory Open Access Journal |
| issn | 2304-8158 |
| language | English |
| last_indexed | 2024-03-10T04:08:11Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Foods |
| spelling | doaj.art-5bcb4bde7f15446ead0ba8a200e105c62023-11-23T08:16:59ZengMDPI AGFoods2304-81582021-12-011012297110.3390/foods10122971Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption ResinJianyong Zhang0Hongchun Cui1Jinjin Xue2Wei Wang3Weiwei Wang4Ting Le5Lin Chen6Ulrich H. Engelhardt7Heyuan Jiang8Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, ChinaTea Research Institute, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, ChinaTea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, ChinaTea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, ChinaTea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, ChinaTea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, ChinaInstitute of Tea Science, Zhejiang University, Hangzhou 310058, ChinaInstitute of Food Chemistry, Technische Universität Braunschweig, 38106 Braunschweig, GermanyTea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, ChinaThe separation and preparation of theasinensins have been hot spots in the field of tea chemistry in recent years. However, information about the mechanism of efficient adsorption of tea theasinensins by resin has been limited. In this study, the adsorption equilibrium and thermodynamics of tea theasinensins by a high-efficiency macroporous adsorption HP20 resin were evaluated. The adsorption of theasinensin A, theasinensin B, and theasinensin C on HP20 resin were spontaneous physical reaction processes. Adsorption processes were exothermic processes, and lowering the temperature was beneficial to the adsorption. The Freundlich model was more suitable to describe the adsorption of tea theasinensins. The adsorption equilibrium constant and maximum adsorption capacity of theasinensin A were significantly higher than theasinensin B and theasinensin C, which indicated that the adsorption affinity of theasinensin A was stronger than that of theasinensin B and theasinensin C. The phenolic hydroxyl groups and intramolecular hydrogen bonds of theasinensin A were more than those of theasinensin B and theasinensin C, which might be the key to the resin’s higher adsorption capacity for theasinensin A. The HP20 resin was very suitable for efficient adsorption of theasinensin A.https://www.mdpi.com/2304-8158/10/12/2971theasinensinsadsorptionequilibriumthermodynamicsresin |
| spellingShingle | Jianyong Zhang Hongchun Cui Jinjin Xue Wei Wang Weiwei Wang Ting Le Lin Chen Ulrich H. Engelhardt Heyuan Jiang Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption Resin Foods theasinensins adsorption equilibrium thermodynamics resin |
| title | Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption Resin |
| title_full | Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption Resin |
| title_fullStr | Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption Resin |
| title_full_unstemmed | Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption Resin |
| title_short | Adsorption Equilibrium and Thermodynamics of Tea Theasinensins on HP20—A High-Efficiency Macroporous Adsorption Resin |
| title_sort | adsorption equilibrium and thermodynamics of tea theasinensins on hp20 a high efficiency macroporous adsorption resin |
| topic | theasinensins adsorption equilibrium thermodynamics resin |
| url | https://www.mdpi.com/2304-8158/10/12/2971 |
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