期刊
JOURNAL OF MEMBRANE SCIENCE
卷 563, 期 -, 页码 592-601出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2018.06.030
关键词
Membrane fouling; Protein; Ionic strength; Electrical impedance spectroscopy (EIS); UV-vis absorbance; Salting-out dehydration
资金
- National Natural Science Foundation of China [51638011, 51578375]
- China Postdoctoral Science Foundation [2017M621081]
- program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China [IRT-17R80]
- China Scholarship Council [201606250111, 201709345009]
In this work, a filtration cell for synchronized UV-vis spectroscopic and electrochemical impedance investigation of the membrane fouling process has been designed. The setup achieves in situ monitoring of the interfacial region during filtration by fiber-optic UV-vis spectroscopy and electrochemical impedance spectroscopy. The influence of ionic strength on protein fouling of membrane was investigated in detail. Results indicate that the flux decline rate decreased slightly when the ionic strengths increased from 0 to 10 and 100 mM during initial filtration stage, however, membrane fouling at higher ionic strengths became more serious at longer fouling duration. This was mainly due to the generation of concentration polarization (CP) and electroosmotic back flow (EOBF) for longer duration, which caused elevated concentration of salt ions near the membrane surface and additional filtration resistance, and accompanied by salting-out dehydration of protein on membrane surface. This is the process that occurs in protein fouling during long-term run, the hydration forces experience from enhancement to disappearance. This study not only expends our knowledge of the effect of ionic strength on protein fouling behavior but also provides a method for the in situ and real time characterization of membrane-solution interface and filtration performance.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据