Shielding membrane surface carboxyl groups by covalent-binding graphene oxide to improve anti-fouling property and the simultaneous promotion of flux

doi:10.1016/j.watres.2016.06.032

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院环境生物技术重点实验室

	Shielding membrane surface carboxyl groups by covalent-binding graphene oxide to improve anti-fouling property and the simultaneous promotion of flux
	Han, Jing-Long; Xia, Xue; Tao, Yu; Yun, Hui; Hou, Ya-Nan; Zhao, Chang-Wei; Luo, Qin; Cheng, Hao-Yi; Wang, Ai-Jie
刊名	WATER RESEARCH
	2016-10-01
卷号	102 期号:0 页码:619-628
关键词	Membrane Modification Combined Membrane Fouling Membrane Filtration Wastewater Secondary Effluent Treatment Volume Charge Density Zeta Potential
DOI	10.1016/j.watres.2016.06.032
英文摘要	Graphene oxide (GO) is an excellent material for membrane surface modification. However, little is known about how and to what extent surface functional groups change after GO modification influence membrane anti-fouling properties. Carboxyl is an inherent functional group on polyamide or other similar membranes. Multivalent cations in wastewater secondary effluent can bridge with carboxyls on membrane surfaces and organic foulants, resulting in serious membrane fouling. In this study, carboxyls of a polydopamine (pDA)/1,3,5-benzenetricarbonyl trichloride (TMC) active layer are shielded by covalently-bound GO. The process is mediated by N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide (EDC)/N-hydroxysuccinimide (NHS). For GO containing low quantities of carboxyls, X-ray photoelectron spectroscopy (XPS) and zeta potential analyzer test results reveal that the carboxyl density decreased by 52.3% compare to the pDA/TMC membrane after GO modification. Fouling experiments shows that the flux only slightly declines in the GO functionalized membrane (19.0%), compared with the pDA/TMC membrane (36.0%) after fouling. In addition, during GO modification process the pDA/TMC active layer also become harder and thinner with the aid of EDC/NHS. So the pure water permeability increases from 56.3 +/- 18.2 to 103.7 +/- 12.0 LMH/MPa. Our results provide new insights for membrane modification work in water treatment and other related fields. (C) 2016 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/36145]
专题	生态环境研究中心_中国科学院环境生物技术重点实验室
推荐引用方式 GB/T 7714	Han, Jing-Long,Xia, Xue,Tao, Yu,et al. Shielding membrane surface carboxyl groups by covalent-binding graphene oxide to improve anti-fouling property and the simultaneous promotion of flux[J]. WATER RESEARCH,2016,102(0):619-628.
APA	Han, Jing-Long.,Xia, Xue.,Tao, Yu.,Yun, Hui.,Hou, Ya-Nan.,...&Wang, Ai-Jie.(2016).Shielding membrane surface carboxyl groups by covalent-binding graphene oxide to improve anti-fouling property and the simultaneous promotion of flux.WATER RESEARCH,102(0),619-628.
MLA	Han, Jing-Long,et al."Shielding membrane surface carboxyl groups by covalent-binding graphene oxide to improve anti-fouling property and the simultaneous promotion of flux".WATER RESEARCH 102.0(2016):619-628.