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Study of NOM fouling behaviour in forward osmosis process
Authors： YANG Ruilin, ZHANG Xinhuan, DONG Bingzhi, XIA Shengji
Units： State Key laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
KeyWords： forward osmosis, natural organic matter, membrane flux, membrane fouling.
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2015, 35(3):37-43

Abstract：

:Fouling of cellulose triacetate (CTA) forward osmosis (FO) membranes was studied by a cross-flow flat-sheet forward osmosis membrane system. Concentrated natural water was employed as the feed solution (FS), and a sodium chloride solution (3 mol/L) was used for the draw solution (DS). Various temperatures and cross-flow velocities were concerned. The membrane flux was calculated by recording the mass changing of the FO andthe substances absorbed on the membranes were extracted by ultrasonic oscillation. The extracted foulant was characterized by methodologies including fluorescence excitation-emission matrices (EEMs) and liquid chromatography with organic carbon detector (LC-OCD). The results showed that a higher cross-flow velocity and lower temperature benefits the anti-fouling capacity of the membrane significantly. Proteins and amino acids were the main foulants on the membrane, withthe molecular weight distributing in two levels: near 630000 Da and 800 Da. CTA membrane has a strong anti-fouling capability to humic acid substances in forward osmosis process.
 

Funds：
国家自然科学基金，钙离子对有机物形成正渗透膜污染的影响机制及调控（51378367）

AuthorIntro：
杨瑞林（1991-），男，安徽六安人，硕士，同济大学环境科学与工程学院，学生，从事正渗透水处理技术研究。

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