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Fouling Analysis and Filtration characteristics of nanofiltration membrane caused by DOM in Natural Raw Water

Authors： FENG Guizhen, FAN Shixiu, HUANG Lin

Units： School of Civil Engineering and Architecture, East China Jiaotong University,Nanchang, 330013,China

KeyWords： molecular weights distribution；hydrophilicity and hydrophobicity；nanofiltration；organic matters；membrane fouling

ClassificationCode：X52；X703

year,volume(issue):pagination： 2021,41(3):105-110

Abstract：

The effect of dissolved organic matters (DOM) in natural raw water on the fouling characteristics of nanofiltration membrane was studied. The hydrophilic and hydrophobic organic compounds with relative molecular weights less than 100KDa, less than 50KDa, less than 30KDa, less than 10KDa and less than 3KDa were separated from DOM in raw water, and the nanofiltration membrane filtration test was carried out. The results showed that the flux attenuation degree and attenuation rate of hydrophobic organic components to nanofiltration membrane were higher than those of hydrophilic organic components in the same molecular weights range. The substances whose hydrophilic organic components have great influence on membrane flux were small molecular organic compounds, and those whose hydrophobic organic components have great influence on membrane flux were macromolecular organic compounds. The hydrophilicity and molecular weights of organic matters would affect the rejection rate of organic matters by nanofiltration membrane.

Funds：

国家自然科学基金项目(51868019)

AuthorIntro：

丰桂珍（1977－），女，山东潍坊人，副教授，博士，主要从事水处理理论与技术研究

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