Study on the effects of cations and anions on the removal of perfluorooctane sulphonate by nanofiltration membrane

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

	Study on the effects of cations and anions on the removal of perfluorooctane sulphonate by nanofiltration membrane
	Zhao, Ying; Zhao, Changwei; Hu, Guangshuo; Hou, Deyin; Yu, Ling; Wang, Jun; Cao, Aixin; Zhai, Yonghong
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2018-08-31
卷号	202 页码:385-396
关键词	Nanofiltration PFOS removal Ion effect DFT calculation
ISSN号	1383-5866
文献子类	Article
英文摘要	Previously, the nanofiltration (NF) membrane has been applied to remove perfluorooctane sulphonate (PFOS), a persistent pollutant from drinking water by our group. However, the effects of co-existence ions on the PFOS removal have not been systematically studied. For instance, cations such as Ca2+ and Fe3+ are found to coordinate with -SO3 groups of PFOS molecule and subsequently influence the rejection properties of NF membrane. In this study, a commercial NF membrane (ESNAl-K1) was utilized to separate PFOS compounds in the existence of three cations including Na+, Ca2+ and Fe3+, as well as three anions including Cl-, SO42- and PO43-. The PFOS rejection increased from 92.65% to 94.74%, 97.14%, and 97.94%, respectively, with 2 mM Na+, Ca2+ and Fe3+, respectively. As the concentrations of anions including SO42- and PO43- increased to 2 mM, the PFOS rejection increased to 94.74% and 97.60%, respectively. The density functional theory (DFT) was applied to analyze the interaction between three different cations with PFOS molecule. It indicated that one Na+ ion could only bind with one PFOS molecule, but every Ca2+ or Fe3+ ion preferred to coordinate with two PFOS molecules. Based on the analysis results of the NF membranes while using the atomic force microscopy (AFM), surface zeta potential (electro-osmosis) and X-ray photoelectron spectroscopy (XPS), the major separation mechanisms of PFOS in the existence of other cations and anions were the sieving effect, and the electrostatic repulsion, respectively.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41187]
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	Zhao, Ying,Zhao, Changwei,Hu, Guangshuo,et al. Study on the effects of cations and anions on the removal of perfluorooctane sulphonate by nanofiltration membrane[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2018,202:385-396.
APA	Zhao, Ying.,Zhao, Changwei.,Hu, Guangshuo.,Hou, Deyin.,Yu, Ling.,...&Zhai, Yonghong.(2018).Study on the effects of cations and anions on the removal of perfluorooctane sulphonate by nanofiltration membrane.SEPARATION AND PURIFICATION TECHNOLOGY,202,385-396.
MLA	Zhao, Ying,et al."Study on the effects of cations and anions on the removal of perfluorooctane sulphonate by nanofiltration membrane".SEPARATION AND PURIFICATION TECHNOLOGY 202(2018):385-396.