阴离子交换树脂对米糠植酸的吸附解吸性能  

Adsorption and Desorption Properties of Phytic Acid from Rice Bran on Anion Exchange Resin

作　　者：王琳[1] 罗建平[1] 查学强[1] 张海林[1] 潘利华[1] 

机构地区：[1]合肥工业大学生物与食品工程学院,合肥230009

出　　处：《农业机械学报》2011年第5期160-165,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：安徽省"十一五"科技攻关项目(08010202143);安徽省教育厅自然科学研究重点项目(KJ2009A042)

摘　　要：通过静态和动态试验研究了6种阴离子交换树脂对植酸的吸附与解吸性能。结果表明,D201树脂对植酸的吸附交换作用较好,且在pH值为2.2时吸附能力最强,静态吸附量达到94.54 mg/g,1.5 mol/L的NaOH溶液利于植酸解吸;Freundlich吸附等温方程可以较好地描述D201树脂对植酸的等温吸附,表明吸附在常温下进行即可;D201树脂对植酸的吸附过程符合Lagergren一级速率方程,表观吸附速率常数k与植酸起始植酸浓度呈负相关关系,与温度呈正相关关系。在D201树脂对植酸的动态吸附与解吸过程中,层析柱管径、上样液浓度、上样液流速和洗脱剂流速对吸附与解吸效果影响较大。The absorption and desorption properties of phytic acid on anion exchange resin were investigated through static and dynamic experiments.The results showed that D201 resin had the best exchange adsorption performance among all tested resins.The static absorption capacity of D201 resin reached 94.54 mg/g when the pH value of phytic acid solution was adjusted to 2.2,and sodium hydroxide solution of 1.5 mol/L was beneficial to desorption.The absorption behavior of D201 resin for phytic acid obeyed the Freundlich adsorption isotherm equation,indicating that the absorption can be performed under normal temperature.The absorption kinetic data complied with Lagergren pseudo-first-order rate equation.The apparent adsorption rate k has a negative correlation with the initial concentration of phytic acid and has a positive correlation with temperature.As far as the dynamic absorption and desorption of phytic acid on D201 resin was concerned,the effects of chromatography column diameter,sample concentration,sample flowing velocity and eluant flowing velocity were notably observed.

关 键 词：植酸 脱脂米糠 阴离子交换树脂 吸附交换 解吸 动力学 

分 类 号：TQ914.1[化学工程] TQ028.15