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原水中有机物特性对纳滤膜污染的影响

丰桂珍,  黄林,  范师秀

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文章导航 > 环境工程  > 2023 >  41(2): 1-6,42
赵晓佳, 王少坡, 于贺, 邱春生, 孙力平, 王晨晨, 赵乐军, 宋现财. 天津中心城区典型下垫面降雨径流污染冲刷特征分析[J]. 环境工程, 2019, 37(7): 34-38. doi: 10.13205/j.hjgc.201907007
引用本文: 丰桂珍, 黄林, 范师秀. 原水中有机物特性对纳滤膜污染的影响[J]. 环境工程, 2023, 41(2): 1-6,42. doi: 10.13205/j.hjgc.202302001
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FENG Guizhen, HUANG Lin, FAN Shixiu. EFFECT OF ORGANIC MATTER CHARACTERISTICS IN RAW WATER ON NANOFILTRATION MEMBRANE FOULING[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 1-6,42. doi: 10.13205/j.hjgc.202302001
Citation: FENG Guizhen, HUANG Lin, FAN Shixiu. EFFECT OF ORGANIC MATTER CHARACTERISTICS IN RAW WATER ON NANOFILTRATION MEMBRANE FOULING[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 1-6,42. doi: 10.13205/j.hjgc.202302001
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原水中有机物特性对纳滤膜污染的影响

doi: 10.13205/j.hjgc.202302001

  • 华东交通大学 土木建筑学院, 南昌 330013

基金项目: 

国家自然科学基金项目(51868019)

详细信息
    作者简介:

    丰桂珍(1977-),女,博士,副教授,研究方向为水处理理论与技术。1491914560@qq.com

    通讯作者:

    丰桂珍(1977-),女,博士,副教授,研究方向为水处理理论与技术。1491914560@qq.com

EFFECT OF ORGANIC MATTER CHARACTERISTICS IN RAW WATER ON NANOFILTRATION MEMBRANE FOULING

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

摘要

    摘要
  • 摘要: 通过XDLVO理论分析了赣江原水中亲疏水性有机污染物对纳滤(NF)膜的污染状况,对选取的不同分子量区间(<100 kDa、<50 kDa、<3 kDa)的6种亲、疏水性有机物及NF膜的界面自由能进行定量分析,分析了膜污染性能,并通过纳滤试验验证通量衰减与界面自由能的对应关系。结果表明:6种不同分子量的亲/疏水性有机污染物对膜造成污染严重程度与XDLVO理论分析结果相符。不同分子量的有机污染物对NF膜污染程度由大到小顺序为小于100 kDa(疏水性)>小于50 kDa(疏水性)>小于3 kDa(疏水性)>小于3 kDa(亲水性)>小于50 kDa(亲水性)>小于100 kDa(亲水性)。分子量<100 kDa的疏水性有机物与膜之间排斥作用最小,污染最为严重。膜表面的污染物主要是多糖、蛋白质和苯环烯烃类,且在过滤初期有机物堵塞膜孔,膜比通量下降速度较快,而在过滤后期滤饼层形成,膜比通量下降速度减缓。
    Abstract: In this research, the XDLVO (extended Derjaguin-Landau-Verwey-Overbeek) theory was employed to analyze the fouling status of nanofiltration (NF) membrane caused by hydrophilic and hydrophobic organic matters. Quantitative analysis was conducted on six types of hydrophilic and hydrophobic organic matters with different molecular weight ranges (less than 100 kDa, less than 50 kDa, and less than 3 kDa, respectively) and the interfacial free energy of NF membrane was analyzed, in a bid to figure out the performance of the membrane fouling. Furthermore, the corresponding relationship between flux decay and interfacial free energy was verified by the NF experiment. The results showed that the degree of membrane fouling caused by the above-mentioned six hydrophilic or hydrophobic organic matters with different molecular weights in this study was consistent with the XDLVO theoretical analysis, in which the hydrophobic ones with a molecular weight less than 100 kDa showed the slightest repulsive interaction against the membrane and led to the most serious fouling. Besides, the degree of NF membrane fouling by different organic matters was ordered in a descending way as follows:(hydrophobic, molecular weight less than 100 kDa)>(hydrophobic, molecular weight less than 50 kDa)>(hydrophobic, molecular weight less than 3 kDa)>(hydrophilic, molecular weight less than 3 kDa)>(hydrophilic, molecular weight less than 50 kDa)>(hydrophilic, molecular weight less than 100 kDa). The main contaminants on the membrane surface were polysaccharides, proteins and phencyclic olefins, the organic matter clogged the membrane pores in the early stages of filtration, resulting in a rapid decrease in the specific flux of the membrane, while the formation of a cake layer in the later stages of filtration slowed the decrease in the specific flux of the membrane.
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  • 收稿日期:  2021-09-09
  • 网络出版日期:  2023-05-25
  • 刊出日期:  2023-02-01

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