超滤(肾)
表面电荷
水溶液
纳滤
吸附
生物物理学
蛋白质吸附
作者
Rui Miao,Lei Wang,Miao Zhu,Deng Dongxu,Songshan Li,Jiaxuan Wang,Tingting Liu,Yongtao Lv
标识
DOI:10.1021/acs.est.6b03660
摘要
To investigate the influence of hydration forces on the protein fouling of membranes and the major influence factors of hydration forces during the ultrafiltration process, bovine serum albumin (BSA) was chosen as model foulant. For various pH levels and hydrated ion and membrane species, the membrane–BSA and BSA–BSA interaction forces, and fouling experiments with BSA, as a function of ionic strength, were measured. Results showed that hydration forces were a universal phenomenon during the membrane filtration process, when the levels of pH, ion species, and membrane performances were appropriate. First, for the BSA negatively charged or neutral, hydration forces caused a decrease in the membrane fouling. Conversely, for the BSA positively charged, the hydration forces were absent because the counterions were not hydrated, and membrane fouling was enhanced. For different hydrated ions, the smaller the radii of the ions were, the stronger the hydration forces that were produced, and the membrane fouling o...
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