Preparation of graphene oxide modified polyamide thin film composite membranes with improved hydrophilicity for natural organic matter removal
Preparation of graphene oxide modified polyamide thin film composite membranes with improved hydrophilicity for natural organic matter removal
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亲水性改善的氧化石墨烯改性聚酰胺薄膜复合膜的制备用于去除天然有机物
DOI：
10.1016/j.cej.2015.06.063
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发表时间：
2015-11-15
影响因子：
15.1
通讯作者：
Zheng, Yi
中科院分区：
文献类型：
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作者：
Xia, Shengji;Yao, Lijuan;Zheng, Yi
纳米材料在薄膜复合膜（TFC）中的引入为许多水处理过程中提高膜渗透和抗污染性能开辟了一个替代的机会。在这项研究中，氧化石墨烯（GO）被纳入到聚酰胺活性层的TFC膜通过界面聚合（IP）反应。通过FT-IR、FE-SEM和水接触角测试对膜的结构、组成和亲水性进行了表征。以真实的天然河水为水样，考察了GO改性TFC膜对天然有机物的分离性能和抗污染性能。通过紫外吸收光谱（UV）、溶解有机碳（DOC）、荧光激发-发射矩阵（FEEM）和分子量分布（MWD）分析了渗透水样品。结果表明，在本研究所考察的GO负载量范围内，GO的加入不仅提高了膜的水通量和NOM去除率，而且改善了膜的抗污染性能，这是由于适量GO的加入改善了膜的亲水性、表面形貌和表面电荷，显示了此类膜在水处理工业中的巨大潜力。(C)2015 Elsevier B. V.版权所有。
The incorporation of nano-materials in thin film composite (TFC) membrane has opened an alternative opportunity to enhance the membrane permeation and anti-fouling properties in many water treatment processes. In this study, graphene oxide (GO) was incorporated into the polyamide active layer of a TFC membrane via interfacial polymerization (IP) reaction. The structure, composition and hydrophilicity of the membranes were characterized by FT-IR, FE-SEM and water contact angle measurements. The separation performance for natural organic matter (NOM) and the anti-fouling properties of the GO modified TFC membranes were investigated with real natural water sampled from a local river. The permeate water samples were analyzed with ultraviolet absorbance (UV), dissolved organic carbon (DOC), fluorescence excitation-emission matrices (FEEMs) and molecular weight distribution (MWD). Within the range of GO loadings assessed in this study, it was found that the TFC membrane incorporated with GO offered not only higher water flux and NOM removal rate, but also better anti-fouling properties, which was ascribed to the favorable change in membrane hydrophilicity, surface morphology and surface charge by the addition of appropriate amount of GO, indicating great potential of such membranes in water industry. (C) 2015 Elsevier B.V. All rights reserved.