| 纳滤膜和低压反渗透膜去除水中氟的对比研究 |
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| 引用本文： | 汪清,李伟英.纳滤膜和低压反渗透膜去除水中氟的对比研究[J].给水排水,2009,35(7). |
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| 作者姓名： | 汪清 李伟英 |
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| 作者单位： | 1. 同济大学长江水环境教育部重点实验室,上海,200092;厦门市城市规划设计研究院,厦门,361012
2. 同济大学长江水环境教育部重点实验室,上海,200092 |
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| 摘 要： | 通过采用NF/RO膜技术去除水中氟离子的试验研究,探讨了膜回收率、操作压力、水的pH、进水含盐量以及运行时间等参数对NF/RO膜除氟效果的影响.试验中确定NF/RO膜的最佳回收率均为15%.结果表明:在相同操作条件下(0.16～0.21 MPa),RO的膜通量是NF的1/2左右,而其F-去除率比NF高2%～15%;水的pH影响NF/RO膜对氟的去除效果,pH越高,膜对氟的去除率越高;随着进水含盐量的增加,NF/RO膜对F-的去除率下降;随着运行时间的增加,RO膜等对F-的去除率基本保持不变,NF膜下降明显.建议RO膜除氟最低压力应高于0.2 MPa;膜法除氟应尽量在弱碱性环境中操作.
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| 关 键 词： | 饮用水 氟 膜分离 NF膜 RO膜 |
Comparative study on fluoride removal by NF and RO |
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| Wang Qing,Li Weiying.Comparative study on fluoride removal by NF and RO[J].Water & Wastewater Engineering,2009,35(7). |
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| Authors: | Wang Qing Li Weiying |
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| Affiliation: | 1.Key Laboratory of Yangtze River Water Environment;Ministry of Education;Tongji University;Shanghai 200092;China;2.Xiamen Urban Planning & Design Institute;Xiamen 361012;China |
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| Abstract: | In this paper,the removal of fluoride from water by nanofiltration(NF)and reverse osmosis(RO)membranes was investigated,the influence factors in which included the membrane recovering rate,applied pressure,pH,salt concentration and operation time.The optimized NF/RO recovering ratio determined in the experiment is about 15%.The results showed that:in the same operation conditions(0.16~0.21 MPa),the RO flux was half of that of NF and the F-removal rate of RO was about 2%~15% higher than NF;the pH of water wa... |
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| Keywords: | Drinking water Fluoride Membrane separation Nanofiltration Reverse osmosis membrane |
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