Fouling of ultrafiltration membranes. The role of protein adsorption and salt precipitation
Fouling of ultrafiltration membranes. The role of protein adsorption and salt precipitation
复制标题
超滤膜结垢。
DOI：
10.1016/0376-7388(89)89005-2
复制
发表时间：
1989
影响因子：
9.5
通讯作者：
J. Gunnink
中科院分区：
文献类型：
--
作者：
J. Hanemaaijer;T. Robbertsen;T. V. D. Boomgaard;J. Gunnink
在乳清的超滤过程中，膜/溶质的相互作用对膜的分离特性有很大的影响。这主要是由于在膜内部发生的难溶性盐的沉淀和/或乳清蛋白的吸附引起的，并影响孔径分布。通过测量沉淀的盐（使用放射性标记程序）和吸附的蛋白质的量，并通过比较具有膜样特征的模型表面上的蛋白质吸附与吸附量，来获得膜内沉淀和吸附的位置的证据。为了量化污染的影响，在孔变窄的UF膜的特征孔径定义，基于低分子量的截留率。膜的形态和表面性质似乎有相当大的影响吸附的蛋白质的量和类型，这表明通过修改膜性能控制膜污染的潜力。
During ultrafiltration (UF) of whey, membrane/solute interactions appear to have a considerable effect on the separation characteristics of the membrane. This is primarily caused by precipitation of poorly soluble salts and/or adsorption of whey proteins, taking place inside the membranes and affecting the pore size distribution. Evidence for location of precipitation and adsorption inside the membrane is obtained by measuring the amounts of salts precipitated (using radiolabelling procedures) and protein adsorbed, and by comparing the protein adsorption with the adsorbed amounts on model surfaces having membrane-like characteristics. To quantify the influence of fouling in terms of pore narrowing a characteristic pore size for UF membranes is defined, based on the retention of low-molecular-mass saccharides. Membrane morphology and surface properties appear to have a considerable influence on the amount and type of protein adsorbed, suggesting a potential for controlling membrane fouling by modification of membrane properties.