食品工业科技2017，Vol.38Issue(5)：134-139,6.DOI:10.13386/j.issn1002-0306.2017.05.017
鸡蛋膜对苏丹红Ⅰ的吸附行为及机制研究
Adsorption behavior and mechanism of Sudan Ⅰ by eggshell membrane.
摘要
Abstract
Adsorption of Sudan Ⅰ by the eggshell membrane was investigated with respect to various parameters such as pH,amount of adsorbent and ionic strength.The Results showed that the best adsorption capacity was found at 10 g·L-1 eggshell membrane,pH6,1％ NaCl.The adsorption equilibrium time was 140 min and the adsorbing capacity was 1.25 mg·g-1.Models of Langmuir,Freundlich and Temkin were used to fit the adsorption isotherms,all of the three models provided good fitting to the adsorption process (R2 was 0.86～0.99),but Freundlich model showed relatively better correlation coefficient (R2 ＞ 0.97).The adsorption thermodynamic parameters showed that Gibbs free energy (△G) ＜ 0,enthalpy (△H) ＞ 0,and entropy (△S) ＞ 0,indicating that the adsorption of Sudan Ⅰ occured on heterogeneous sites with non-uniform distribution of energy levels and the adsorption process was spontaneous,endothermic and entropy increasing.On the other hands,Kinetics of the sorption process were also investigated and the adsorption kinetic process provided good fitting with the Lagergren pseudo-second order kinetic model.In conclusion,eggshell membrane have a good adsorption effect to Sudan Ⅰ.关键词
鸡蛋膜/苏丹红Ⅰ/吸附热力学/吸附动力学Key words
eggshell membrane/Sudan Ⅰ/adsorption thermodynamic/adsorption kinetic分类
轻工纺织引用本文复制引用
李莹,张沛,王安易,王世平..鸡蛋膜对苏丹红Ⅰ的吸附行为及机制研究[J].食品工业科技,2017,38(5):134-139,6.基金项目
朝阳区食品安全监管体系构建及关键技术研究课题(25012152). （25012152）
