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Applied research of graphene oxide polypiperazine-amide composite nanofiltration in removal of dye wastewater

Authors： Wang Jin , Zhao Changwei 2, Wu zhen 3, Wang Tao 1, Li Xiang 1, Li Jiding 1*

Units： 1. The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China; 2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 3. Ordos Redbud Innovation Institute, Ordos 017000.

KeyWords： Graphene oxide; polyamide; nanofiltration membrane; interfacial polymerization; dye.

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(6):86-94

Abstract：

The anti-fouling graphene oxide modified polyamide composite nanofiltration membranes (GO-PA) were prepared through trimesoyl chloride (TMC) reacting with the GO dispersion in piperazine (PIP) aqueous solution via interfacial polymerization (IP) on the polyether sulfone (PES) UF substrates, and the prepared composite nanofiltration membrane was applied in removal of dye wastewater. The characterization results indicated that the negative charged membrane was successfully fabricated, and the mean effective pore size and the molecular weight cut-off (MWCO) were about 0.4 nm and 774 Da respectively. The pure water flux was 87.6 (L•m-2•h-1) under the operating pressure of 0.6 MPa, and the salt rejections of the membrane decrease in the order Na2SO4 (98.2%) > MgSO4 (96.5%)> NaCl (56.8%) > MgCl2 (50.5%). Fouling resistances of the membranes results revealed that the GO-PA membrane had improved the antifouling properties. The removal of the Silk Scarlet (GR GR), Direct Black 22 (DB), Sun Yellow (SY) was investigated in this study, the result suggested that the GO-PA membrane could effective remove the dyes and its rejection were above 98%.

Funds：

基金项目：江苏先进生物与化学制造协同创新中心项目，国家自然科学基金项目（21576150）；清华大学科学基金项目（20131089399）；国家科技部科研院所技术开发研究专项资金(2013EG111129)。

AuthorIntro：

作者简介：王进（1991-），男，北京，硕士研究生，从事纳滤膜材料以及过程等方向研究；电子邮箱：wangjinhnu@163.com。 ?联系作者：李继定（1954-），男，清华大学教授，从事膜分离与分离膜等方向研究，E-mail：lijiding@mail.tsinghua.edu.cn。

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