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Journal of Tea Science ›› 2016, Vol. 36 ›› Issue (6): 639-645.doi: 10.13305/j.cnki.jts.2016.06.011

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Adsorption of Basic Fuchsine by Modified Green Tea

LI Zhuoli, CAI Xiaomin, XU Yijie, YUAN Jingyue, ZHENG Qunxiong, XIONG Chunhua*   

  1. School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
  • Received:2016-06-12 Online:2016-12-15 Published:2019-08-26

Abstract: Green tea was modified by chemical reagents for preparing biosorbent to remove basic fuchsine in waste water. Effects of chemical reagents, relative concentration, initial concentration of basic fuchsine, adsorption time, temperature on the adsorption capacity and adsorption kinetics were investigated for optimum condition analysis. Results showed that the best chemical reagent was epichlorohydrin. The optimum concentration was 0.015 mol·L-1. The optimum initial concentration of basic fuchsine was 20 mg·L-1. The optimum temperature was 30℃. The optimum absorption time was 240 min. The maximum absorption capacity of the modified green tea reached 53.6 mg·g-1. The adsorption kinetics followed the pseudo-first-order kinetic model. According to the isothermal adsorption of fuchsin basic adsorption with modified green tea, the Langmuir model was suitable for application. The adsorption of fuchsin basic by modified green tea belongs to single molecule layer adsorption.

Key words: modified green tea, fuchsin basic, absorption, kinetics

CLC Number: