0.2μmAl_2O_3陶瓷膜微滤桑菊饮水提液的污染机制研究  

Study on the Fouling Mechanism of the 0.2μm Al_2O_3 Ceramic Membrane in the Microfiltation of Extract of Sangjuyin

作　　者：林瑛[1] 樊文玲[1] 郭立玮[1] 

机构地区：[1]南京中医药大学中医药研究院,江苏南京210029

出　　处：《中国野生植物资源》2007年第4期57-59,共3页Chinese Wild Plant Resources

基　　金：国家自然科学基金项目(30171161);国家中医药管理局中医药科学技术研究专项(02-03ZP33)

摘　　要：目的:研究0.2μmAl2O3陶瓷膜微滤桑菊饮复方水提液过程中的膜污染机理。方法:以桑菊饮复方水提液为研究对象,根据Darcy-Poiseuille定律这一过滤模型确定过滤阻力分布情况,对污染膜表面沉积层的组成物质进行了傅立叶转换红外光谱分析及粒径分析,同时对污染膜表面和截面的进行高分辨扫描电镜观测。结果:①膜阻力主要集中在表面沉积层,浓差极化层阻力起了次要作用,膜本身的阻力及膜孔内部污染阻力所占比例最小。并且,这与通过对SEM图像的分析所得到的结论大致相吻合。②通过红外光谱对膜污染物进行定性分析可知膜污染物中分子主要具有肽键,羰基和羟基。③污染膜表面沉积层的组成物质的粒径分布情况为:占有较大体积百分数的粒子的半径集中在18.627μm左右,而占有较高数量的粒子的半径集中在0.424μm左右。结论:研究微滤过程中的膜污染机理对于采用减缓膜通量减少的措施及寻找有效的膜再生方法有重要指导作用。Objective：To discuss the fouling mechanism of ceramic membrane in the microfiltation of extract of Sangjuyin. Method ： The extract of Sangjuyin were microfihed. The substance of the deporsit on the surface of the membrane was analysed by Fourior transform infra-red spectrum. The characteristic of the surface and section of the polluted membrane was analysed by SEM. Result：①the fltration resistance is mainly decided by the deposit resistance, the concentration polarization resistance is less important ②The molecule of the fouling mainly contain peptid bond, carbonyl bond and hydroxy bond. ③The particle size distribution of the substance of the deposit on the surface of the polluted membrane ： The radius of the particle taking a larger percentage in volume concentrate in 18. 6271μm around, while the radius of the particle taking a larger percentage in quantity concentrate in 0. 4241μm around .

关 键 词：陶瓷膜 微滤 中药水提液 膜污染 

分 类 号：TQ461[化学工程—制药化工]