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目的:探讨不同“溶液环境”对中药模拟体系陶瓷膜微滤过程的影响。方法:以大豆蛋白、小檗碱二元体系为考察对象,以膜通量、小檗碱透过率、蛋白质截留率为指标,考察不同溶液环境对于膜过程的影响。结果:大豆蛋白在1 g.L-1的质量浓度下,膜通量最小,小檗碱的透过率随浓度增加略有降低;pH 4时膜通量最大,蛋白质截留率达99%,且小檗碱的透过率达到60%以上。结论:通过优化中药水提液的溶液环境,可以有效提高膜分离的效率,对于以蛋白质为主要膜污染物的溶液体系,调节pH至蛋白质的等电点附近时,膜分离效果较好。
Objective: To investigate the influence of different “solution environments” on the microfiltration process of ceramic membranes in Chinese herbal simulation system. Methods: Soybean protein and berberine binary system were used as the object of investigation. Membrane flux, berberine transmission rate and protein retention rate were used as indicators to investigate the effect of different solution environments on the membrane process. RESULTS: Soy protein had the smallest flux at the mass concentration of 1 gL-1. The transmission rate of berberine slightly decreased with the increase of concentration. At pH 4, the membrane flux was the highest, and the protein retention rate was 99%. The transmission rate of osmium base reaches more than 60%. Conclusion: By optimizing the solution environment of traditional Chinese medicine aqueous extract, the efficiency of membrane separation can be effectively improved. For the solution system with protein as the main membrane contaminant, the membrane separation effect is better when the pH is adjusted to the isoelectric point of the protein.