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Dielectric monitoring of membrane fouling during simulated treatment for polluted water by ceramic membrane-powdered activated carbon suspension

Authors： YANG Man1, HUANG Rongrong1, ZHAO Kongshuang1, *, SONG Jia2, ZHANG Xihui2

Units： 1 College of Chemistry, Beijing Normal University, Beijing 100875, China 2 Research Center for Environmental Engineering and Management, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055

KeyWords： dielectric relaxation spectroscopy; ceramic membrane; activated carbon; membrane fouling; real-time monitoring

ClassificationCode：O63；TQ028

year,volume(issue):pagination： 2016,36(5):72-80

Abstract：

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.

Funds：

国家自然科学基金(No.21173025, 21473012)

AuthorIntro：

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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