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天然原水中DOM对纳滤膜的污染分析及过滤特性研究

作者：丰桂珍，范师秀，黄林

单位：华东交通大学土木建筑学院，南昌 330013

关键词：分子量分布；亲疏水性；纳滤；有机物；膜污染

DOI号：

分类号： X52；X703

出版年,卷(期):页码： 2021,41(3):105-110

摘要：

试验研究天然原水中溶解性有机物（DOM）对纳滤膜污染特性的影响。原水中的DOM分离得到相对分子量小于100KDa、小于50KDa、小于30KDa、小于10KDa和小于3KDa的亲水性和疏水性有机物，对其进行纳滤膜过滤试验。结果表明，疏水性有机物组分对纳滤膜造成的通量衰减程度和衰减速率均高于相同分子量区间的亲水性有机物组分；亲水性有机物组分对膜通量影响较大的物质为小分子有机物，疏水性有机物组分对膜通量影响较大的物质为大分子有机物；有机物的亲疏水性和分子量大小均会影响纳滤膜对有机物的截留率。

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.

基金项目：

国家自然科学基金项目(51868019)

作者简介：

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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