Using tea stalk lignocellulose as an adsorbent for separating decaffeinated tea catechins

被引:54
作者
Ye, J. H. [1 ]
Jin, J. [1 ]
Liang, H. L. [1 ]
Lu, J. L. [1 ]
Du, Y. Y. [1 ]
Zheng, X. Q. [1 ]
Liang, Y. R. [1 ]
机构
[1] Zhejiang Univ, Tea Res Inst, Hangzhou 310029, Zhejiang, Peoples R China
关键词
Antioxidant; Caffeine; Pine sawdust; Bagasse; Macroporous resin; SUPERCRITICAL CARBON-DIOXIDE; GREEN TEA; CAFFEINE CONSUMPTION; LIGNIN; WATER; REMOVAL; POLYPHENOLS; CHEMISTRY; SAWDUST; FUTURE;
D O I
10.1016/j.biortech.2008.07.003
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Lignocelluloses prepared from woody tea stalk, pine sawdust and sugarcane bagasse were used as adsorbents to isolate decaffeinated catechins from tea extracts and compared with synthetic macroporous resin HPD 600. HPD 600 had the highest adsorption capacity to catechins, followed by tea stalk lignocellulose while lignocelluloses of pine sawdust and bagasse the least. Tea stalk lignocellulose absorbed preferentially tea catechins and showed a good selectivity. HPD 600 absorbed caffeine and tea catechins simultaneously. The kinetics data of tea stalk lignocellulose showed a good fit with the Langmuir isotherm model. It is considered that tea stalk lignocellulose is an alternative low-cost adsorbent for preparing decaffeinated tea catechins. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:622 / 628
页数:7
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