Fabrication of novel poly(m-phenylene isophthalamide) hollow fiber nanofiltration membrane for effective removal of trace amount perfluorooctane sulfonate from water

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Fabrication of novel poly(m-phenylene isophthalamide) hollow fiber nanofiltration membrane for effective removal of trace amount perfluorooctane sulfonate from water
	Wang, Tao; Zhao, Changwei; Li, Pei; Li, Ye; Wang, Jun
刊名	JOURNAL OF MEMBRANE SCIENCE
	2015-03-01
卷号	477 页码:74-85
关键词	Nanofiltration Hollow fiber membrane PFOS removal
英文摘要	This study investigated the separation performance of a hollow fiber nanofiltration membrane, which was fabricated from poly(m-phenylene isophthalamide) (PMIA) using a dry-jet wet spinning technology, for sustainable water recovery from water containing trace amount of perfluorooctane sulfonate (PFOS) that was a persistent organic pollutant commonly existed in water. SEM spectra indicated that the cross section of the hollow fiber membrane had an asymmetrical structure that consisted of a dense outer surface acting as a selectively layer, a spongy-like transition layer, and finger-like microvoids close to the inner surface. The average pore size and molecular weight cut-off, which were estimated using the solute rejection method, were 0.404 nm and 904 Da, respectively. The PFOS rejection experiments were carried out at the trans-membrane pressures ranging from 4 x 10(5) Pa to 1.0 x 10(6) Pa and PFOS concentrations from 50 mu g/L to 500 mu g/L. In all cases, the PFOS rejections were found to be increased as the PFOS concentration increased. The impact of the pH value and Ca2+ concentration of the feed solution on the PFOS rejections was studied in detail. The PFOS rejections improved from 91.17% to 97.49% with an increase in pH from 3.2 to 9.5 at 4 x 10(5) Pa. An increase of Ca2+ concentration from 0.1 mM to 2 mM enhanced PFOS rejection from 97.10% to 99.40% at a trans-membrane pressure of 4 x 10(5) Pa. The sorption/desorption experiments indicated that the amount of PFOS adsorbed on the membrane surface was five times higher in the presence of Ca2+ (2 mM). AFM experiments also demonstrated that the membrane surface was rough with the addition of Ca2+ Hence, the presence of Ca2+ enhanced the PFOS adsorption in the membrane surface and caused more pore blockage of the membrane. As such, the declination in the water flux and augmentation in the PFOS rejection were observed. (C) 2014 Elsevier B.V. All rights reserved.
研究领域[WOS]	Engineering, Chemical ; Polymer Science
WOS记录号	WOS:000349383100009
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32778]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Wang, Tao,Zhao, Changwei,Li, Pei,et al. Fabrication of novel poly(m-phenylene isophthalamide) hollow fiber nanofiltration membrane for effective removal of trace amount perfluorooctane sulfonate from water[J]. JOURNAL OF MEMBRANE SCIENCE,2015,477:74-85.
APA	Wang, Tao,Zhao, Changwei,Li, Pei,Li, Ye,&Wang, Jun.(2015).Fabrication of novel poly(m-phenylene isophthalamide) hollow fiber nanofiltration membrane for effective removal of trace amount perfluorooctane sulfonate from water.JOURNAL OF MEMBRANE SCIENCE,477,74-85.
MLA	Wang, Tao,et al."Fabrication of novel poly(m-phenylene isophthalamide) hollow fiber nanofiltration membrane for effective removal of trace amount perfluorooctane sulfonate from water".JOURNAL OF MEMBRANE SCIENCE 477(2015):74-85.