%0 Journal Article
%T Adsorption Kinetics and Thermodynamics of Theanine onto Anion Exchange Resins<br>阴离子交换树脂对茶氨酸的吸附动力学和热力学
%A TIAN Si-si
%A WANG Xia
%A WANG Hao-qi
%A YAO Zhong
%A ZHOU Zhi
%A SUN Yun
%A XIONG Qiang
%A XU Hong
%A <br>田思思
%A 王霞
%A 王浩绮
%A 姚忠
%A 周治
%A 孙芸
%A 熊强
%A 徐虹
%J 过程工程学报
%D 2012
%I 
%X To separate the synthesized theanine by enzymatic method,the adsorption of theanine onto anion exchange resins under alkaline condition was investigated.The results revealed that the adsorption properties of strongly basic resins were better than that of weakly basic resins.While the gel-type basic resin of HZ202 was used,its equilibrium adsorption capacity for theanine was 96.3 mg/g at pH 9.0.The experimental results showed that theanine was loaded on the HZ202 resin with a non-uniform distribution.The isotherm data well fit to Sips model.The △G change was all negative at different temperatures,indicating that the adsorption process was exothermic and spontaneous.Enthalpy change lied between 20.9～418.4 kJ/mol,suggesting that the adsorption process was chemical adsorption.The kinetic data of adsorption fit well to the pseudo-second-order model.It suggested that the adsorption rate was limited by chemical reaction.The adsorption rate would be improved with increasing of initial concentration of theanine.
%K theanine
%K anion exchange
%K adsorption
%K separation
%K thermodynamics
%K kinetics<br>茶氨酸
%K 离子交换
%K 吸附
%K 分离
%K 动力学
%K 热力学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=21CB0722CA48644FDACB3AFEF55675CD&yid=99E9153A83D4CB11&vid=59906B3B2830C2C5&iid=E158A972A605785F&sid=421C41B8FD4D3EBA&eid=E4BEEBB9A80BC67E&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=0