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Membrane Water Treatment
  Volume 9, Number 4, July 2018 , pages 211-220

Preparation of graphene oxide incorporated polyamide thin-film composite membranes for PPCPs removal
Xiaoping Wang, Nana Li, Yu Zhao and Shengji Xia

    Incorporating nano-materials in thin-film composite (TFC) membranes has been considered to be an approach to achieve higher membrane performance in various water treatment processes. This study investigated the rejection efficiency of three target compounds, i.e., reserpine, norfloxacin and tetracycline hydrochloride, by TFC membranes with different graphene oxide proportions. Graphene oxide (GO) was incorporated into the polyamide active layer of a TFC membrane via an interfacial polymerization (IP) reaction. The TFC membranes were characterized with FTIR, FE-SEM, AFM; in addition, the water contact angle measurements as well as the permeation and separation performance were evaluated. The prepared GO-TFC membranes exhibited a much higher flux (3.11+-0.04 L/m2 h bar) than the pristine TFC membranes (2.12+-0.05L/m2 h bar) without sacrificing their foulant rejection abilities. At the same time, the GO-modified membrane appeared to be less sensitive to pH changes than the pure TFC membrane. A significant improvement in the anti-fouling property of the membrane was observed, which was ascribed to the favorable change in the membrane\'s hydrophilicity, surface morphology and surface charge through the addition of an appropriate amount of GO. This study predominantly improved the understanding of the different PA/GO membranes and outlined improved industrial applications of such membranes in the future.
Key Words
    graphene oxide; polyamide membrane; thin-film composite; interfacial polymerization; PPCPs
1. State Key laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
2. Key laboratory of Yangtze River Water Environment, Ministry of education, Tongji University, Shanghai, 200092, China

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