Molecular Mechanisms of Ultrafiltration Membrane Fouling in Polymer-Flooding Wastewater Treatment: Role of Ions in Polymeric Fouling

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	Molecular Mechanisms of Ultrafiltration Membrane Fouling in Polymer-Flooding Wastewater Treatment: Role of Ions in Polymeric Fouling
	Liu, GC; Yu, SL; Yang, HJ; Hu, J; Zhang, Y; He, B; Li, L; Liu, ZY
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2016
卷号	50 期号:3 页码:1393—1402
关键词	ATOMIC-FORCE MICROSCOPY REVERSE-OSMOSIS MEMBRANES MICROCYSTIS-AERUGINOSA INORGANIC SALTS SPECTROSCOPY AFM POLYACRYLAMIDE SOLUBILITY BEHAVIOR REMOVAL
ISSN号	0013-936X
通讯作者	Yu, SL (reprint author), Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China. ; Hu, J (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, POB 800-204, Shanghai 201800, Peoples R China.
英文摘要	Polymer (i.e., anionic polyacrylamide (APAM)) fouling of polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes and its relationships to intermolecular interactions were investigated using atomic force microscopy (AFM). Distinct relations were obtained between the AFM force spectroscopy measurements and calculated fouling resistance over the concentration polarization layer (CPL) and gel layer (GL). The measured maximum adhesion forces (F-ad,F-max) were closely correlated with the CPL resistance (R-p), and the proposed molecular packing property (largely based on the shape of AFM force spectroscopy curve) of the APAM chains was related to the GL resistance (R-g). Calcium ions (Ca2+) and sodium ions (Na+) caused more severe fouling. In the presence of Ca2+, the large R-p corresponded to high foulant-foulant F-ad,F-max) resulting in high flux loss. In addition, the R-g with Ca2+ was minor, but the flux recovery rate after chemical cleaning was the lowest, indicating that Ca2+ created more challenges in GL cleaning. With Na+, the fouling behavior was complicated and concentration-dependent. The GL structures with Na+, which might correspond to the proposed molecular packing states among APAM chains, played essential roles in membrane fouling and GL cleaning.
收录类别	SCI
语种	英语
WOS记录号	WOS:000369471300037
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/25776]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Liu, GC,Yu, SL,Yang, HJ,et al. Molecular Mechanisms of Ultrafiltration Membrane Fouling in Polymer-Flooding Wastewater Treatment: Role of Ions in Polymeric Fouling[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(3):1393—1402.
APA	Liu, GC.,Yu, SL.,Yang, HJ.,Hu, J.,Zhang, Y.,...&Liu, ZY.(2016).Molecular Mechanisms of Ultrafiltration Membrane Fouling in Polymer-Flooding Wastewater Treatment: Role of Ions in Polymeric Fouling.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(3),1393—1402.
MLA	Liu, GC,et al."Molecular Mechanisms of Ultrafiltration Membrane Fouling in Polymer-Flooding Wastewater Treatment: Role of Ions in Polymeric Fouling".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.3(2016):1393—1402.