硅藻土吸附梨果汁中棒曲霉素的动力学模型研究

Study on kinetic model of adsorption of patulin from pear juice by diatomite

中文关键词:  棒曲霉素  硅藻土  吸附  梨果汁

英文关键词:patulin  diatomite  adsorption  pear juice

中文摘要:

      目的 寻找一种有效去除梨果汁中棒曲霉素(patulin, PAT)的方法。方法 以硅藻土作为吸附剂对梨果汁中棒曲霉素进行吸附, 分析了吸附等温线, 吸附热力学和动力学特征。结果 在35 ℃下AG-3000#型硅藻土对梨果汁中棒曲霉素具有较好的吸附作用, 最高吸附量为1066.152 μg/g, 最大吸附率为88.8%, 且吸附为自发吸热过程。吸附等温线结果显示, 棒曲霉素的吸附量随着棒曲霉素初始浓度的增大而增大; 吸附热力学特征符合Langmiur吸附等温线模型。吸附动力学结果显示, 硅藻土对梨果汁中棒曲霉素的吸附符合准二级速率方程模型。结论 AG-3000#硅藻土适合梨果汁中棒曲霉素的吸附。

英文摘要:

      Objective To find a method to effectively remove patulin from pear juice. Methods Diatomite was used as adsorbent to adsorb patulin from pear juice, and the adsorption isotherms, adsorption kinetics and adsorption thermodynamics for patulin by diatomite were analyzed in this study. Results AG-3000# diatomite had a good adsorption effect on patulin from pear juice at 35 ℃, with a maximum adsorption capacity of 1066.152 μg/g and a maximum adsorption rate of 88.8%. And the reaction process is a spontaneous endothermicreaction.The adsorption isotherm results showed that the adsorption capacity increased with the increase of the original concentration of patulin, and the adsorption thermodynamic characteristics were fit with the langmiur adsorption isotherm model. The results of adsorption kinetics showed that the adsorption of patulin from pear juice by diatomite was in accordance with the quasi-second-order rate equation model. Conclusion AG-3000# diatomite is suitable for the adsorption of patulin from pear juice.