膜科学与技术

陶瓷膜-粉末活性炭组合工艺模拟处理污水过程中膜污染的介电监测

作者：杨曼¹，黄蓉蓉¹，赵孔双¹，宋佳²，张锡辉²

单位： 1 北京师范大学化学学院，北京 100875 2 清华大学深圳研究生院环境工程与管理研究中心, 深圳 518055

关键词：介电谱，陶瓷膜，活性炭，膜污染，实时监测

出版年,卷(期):页码： 2016,36(5):72-80

摘要：

利用介电弛豫谱（DRS）方法实施了对陶瓷膜-活性炭组合工艺处理污染饮用水过程的模拟研究，发现由介电参数表征的膜-“污水”之间的界面极化会强烈地受液相中活性炭浓度影响：随着活性炭浓度的增大，原本的膜-液间的界面极化向污垢层/污水形成的新的界面极化的转化—显示了膜污染的发生，活性炭浓度超过0.3g/L时，污染变得显著，而且，这个膜污染过程和膜运行时间的关联性可以被污垢层、膜、污染液三相电参数来表征。由此结果我们学到了：可以通过测量的介电参数和解析获得的污垢层相的电参数完成对模拟陶瓷膜污染过程进行实时监测；对于本研究的平板陶瓷膜-活性炭(腐植酸)悬浮液的体系，最佳运行时间为1h左右。本研究表明通过定量的模型化介电解析实施对组合工艺中陶瓷膜的污染监测是可行的。

The process of simulated treatment for polluted water by ceramic membrane-powdered activated carbon suspension was studied by dielectric relaxation spectroscopy (DRS). Dielectric parameters show that the interfacial polarization between membrane and polluted water is strongly influenced by the concentration of activated carbon: with the increase of activated carbon, the interfacial polarization between membrane and polluted water turns into the interfacial polarization between fouling layer and polluted water, suggesting the occurrence of membrane fouling; when the activated carbon concentration exceeds 0.3g/L, the fouling becomes significant. Besides, the relevance of membrane fouling and running time of the treatment process can be characterized by the electrical parameters of fouling layer, membrane and contaminating fluid. Thus we draw the conclusion that: the fouling process of ceramic membrane can be monitored in real time by the measured dielectric parameters and electrical parameters of fouling layer obtained by dielectric analysis; for the flat ceramic membrane-activated carbon (corrosive acid) suspension system in this work, the optimum operating time is about 1h. This study shows that the quantitative modeling dielectric analysis is feasible to monitor the fouling of ceramic membrane in combined process.

第一作者简介：杨曼，女，博士研究生，北京师范大学化学学院，研究方向为高分子凝胶和高分子膜的介电研究,Email: yangman0914@163.com, * 通讯作者Email:zhaoks@bnu.edu.cn

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