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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; 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.
2016
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume50Issue:3Pages:1393—1402
Subtype期刊文献
AbstractPolymer (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.
KeywordAtomic-force Microscopy Reverse-osmosis Membranes Microcystis-aeruginosa Inorganic Salts Spectroscopy Afm Polyacrylamide Solubility Behavior Removal
DOI10.1021/acs.est.5b04098
Indexed BySCI
Language英语
WOS IDWOS:000369471300037
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25776
Collection中科院上海应用物理研究所2011-2019年
Corresponding AuthorYu, 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.
Recommended Citation
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.,...&Hu, J .(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.
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