| 不同pH值下腐殖酸反渗透膜污染中的界面相互作用解析 |
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| 引用本文： | 彭茜,冉德钦,王平,殷永泉,梁爽.不同pH值下腐殖酸反渗透膜污染中的界面相互作用解析[J].中国环境科学,2011,31(4):616-621. |
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| 作者姓名： | 彭茜 冉德钦 王平 殷永泉 梁爽 |
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| 作者单位： | 山东大学环境科学与工程学院,山东,济南,250100 |
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| 基金项目： | 50908133)，留学回国人员科研启动基金(教外司留[2010]1561号 |
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| 摘 要： | 应用extended derjaguin-landau-verwey-overbeek (扩展DLVO) 理论评价不同pH值下范德华力、静电力、疏水性力3种界面相互作用对腐殖酸反渗透(reverse osmosis, RO)膜污染的贡献,探究pH值影响腐殖酸RO膜污染的主控机制.对3种常规RO膜的理论分析结果表明,静电力对腐殖酸RO膜污染的贡献很小,范德华力使膜污染加剧;疏水性力会减缓膜污染.与前期粘附阶段相比,后期粘聚阶段中范德华力的贡献有所增大,疏水性力在2个污染阶段中均起主导作用.膜污染随pH值的降低而加重,疏水性力作用能的改变是pH值影响系统界面自由能的主控机制.相应pH值下3种RO膜过滤实验数据及其相关性分析结果表明,扩展DLVO理论能定量评价3种界面相互作用的贡献,界面自由能和膜污染之间有很好的相关关系,RO膜纯水接触角的数值不宜作为评价膜污染的指标.
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| 关 键 词： | 反渗透膜 腐殖酸 膜污染 界面自由能 扩展DLVO理论 |
| 收稿时间： | 2010-09-02; |
Analysis of interfacial interactions in reverse osmosis membrane fouling by humic acid Effect of solution pH |
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| PENG Qian,RAN De-qin,WANG Ping,YIN Yong-quan,LIANG Shuang.Analysis of interfacial interactions in reverse osmosis membrane fouling by humic acid Effect of solution pH[J].China Environmental Science,2011,31(4):616-621. |
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| Authors: | PENG Qian RAN De-qin WANG Ping YIN Yong-quan LIANG Shuang |
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| Institution: | PENG Qian,RAN De-qin,WANG Ping,YIN Yong-quan,LIANG Shuang(School of Environmental Science and Engineering,Shandong University,Jinan 250100,China) |
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| Abstract: | The extended Derjaguin-Landau-Verwey-Overbeek(XDLVO) approach was applied for better understanding of the basic interfacial interactions(i.e.van der Waals interaction,electrostatic interaction and acid-base interaction) involved in reverse osmosis(RO)membrane fouling by humic acid at different pHs.Based on the theoretical calculations with three representative RO membranes,the electrostatic interaction was found to be negeligible in membrane fouling.The van der Waals interaction favored fouling,whereas acid... |
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| Keywords: | reverse osmosis(RO) membrane humic acid membrane fouling surface free energy extended Derjaguin-Landau-Verwey-Overbeek(XDLVO) approach |
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