One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment

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

	One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment
	Yu, Ling; Zhang, Yong; Xu, Lili; Liu, Qinyi; Borjigin, Baoleerhu; Hou, Deyin; Xiang, Jun; Wang, Jun
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2020-11-01
卷号	250 页码:1-14
关键词	Polyamine Low pH stable Curing treatment Dually charged surface
ISSN号	1383-5866
英文摘要	In order to enhance the membrane separation efficiency of multivalent metal ions and acid, high performance Janus acid-resistant nanofiltration membranes (NFMs) with opposite charge properties (selective layer) were fabricated by polyethyleneimine (PEI) and cyanuric chloride (CC) via interfacial polymerization. A novel and facile method (named LC-CT) was developed to obtain the Janus acid-resistant NFMs in one step, by controlling the organic phase (CC) concentration to be low followed by the curing treatment. It was found that CC concentration had a significant effect on the charge property of the membrane surface. Low CC concentration endowed a loose selective layer with many unreacted -NH2 on the flip side while curing treatment attributed to the less defective layer. Thus, LC-CT method endowed the membrane Janus property with high salt rejection and flux. The new generated Janus NFMs exhibited better acid stability than NFM-1 (commercial, polyamide), and higher MgCl2 rejection than NFM-1 and NFM-2 (commercial, acid-resistant) after soaking in 3 wt% HCl at 25 degrees C for 1800 h or 50 degrees C for 72 h. Also, the flux of this polyamine Janus NFM was 4.2 similar to 19 times higher than that of previous reported polyamine acid-resistant NFMs, which indicated a good application potential of this membrane in acidic wastewater treatment.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44970]
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	Yu, Ling,Zhang, Yong,Xu, Lili,et al. One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,250:1-14.
APA	Yu, Ling.,Zhang, Yong.,Xu, Lili.,Liu, Qinyi.,Borjigin, Baoleerhu.,...&Wang, Jun.(2020).One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment.SEPARATION AND PURIFICATION TECHNOLOGY,250,1-14.
MLA	Yu, Ling,et al."One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment".SEPARATION AND PURIFICATION TECHNOLOGY 250(2020):1-14.