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

Bioresour Technol. 2009 Jan;100(2):622-8. doi: 10.1016/j.biortech.2008.07.003. Epub 2008 Aug 16.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Caffeine / isolation & purification*
  • Camellia sinensis / chemistry*
  • Catechin / isolation & purification*
  • Lignin / chemistry*
  • Plant Components, Aerial
  • Plant Extracts / chemistry*
  • Tea / chemistry*
  • Ultrafiltration / methods*

Substances

  • Plant Extracts
  • Tea
  • lignocellulose
  • Caffeine
  • Catechin
  • Lignin